Problems with 2004 Nissan Altima ENGINE AND ENGINE COOLING

Tl*the contact owns a 2004 nissan altima. while driving approximately 40 mph on normal road conditions, the engine stalled without warning. the engine restarted after several attempts. the check engine warning indicator remained illuminated until the engine was turned off. the vehicle was taken to an authorized dealer and they stated that the failure was related to the crank shaft sensor. the vehicle was repaired. on three separate occasions, the failure recurred. the vin was excluded from the recall, although the failures were identical. the failure mileage was 69,266 and current mileage was 79,400. updated 11/17/08 *cn

Tl*the contact owns a 2004 nissan altima. the contact stated that the electronic control module was reprogrammed according to nhtsa campaign id number 06v242000 (engine and engine cooling). after the repair, the engine warning indicator illuminated on the instrument control panel. she took the vehicle to a local repair shop and they stated that error codes appeared for the crankshaft position sensor. the technician further stated that there was possibly a miscommunication between the vehicle's computer and engine. the failure has not yet been properly remedied. the manufacturer did not assist. the failure mileage was 65,447 and current mileage was 79,666.

Tl*the contact owns a 2004 nissan altima. while driving approximately 60 mph, the engine light illuminated. the contact took her vehicle to a mechanic shop and a diagnostic was performed. she was informed that the camshaft sensor needed to be replaced. the mechanic also stated that there was a recall on the defect, but her vin was not included. the contact stated that her vehicle would stall while driving and should be included in the recall. the vehicle has not yet been repaired. the recall number was unknown. the failure and current mileages were 84,000.

Car shut down while driving. there was a recall to reset the ecm that was causing this problem. i was unaware of this recall but now learn that if i had brought my car in to have the system reset i would not have been out any money. but now that the problem has arisen and the car shut down on me, this caused the "check engine light" to come on. now i must pay to have the sensor replaced not just reset. *tr

2004 nissan altima 2.5 shuts off on me while i'm driving or parked at a stop light. i had the car taken last year for a ecm reprogram recall last year. now i've heard that certain years models are having the same problem 2005, 2006, possibly a crankshaft sensor. i searched for a recall for my particular car and i have not find one. any suggestions? *tr

I was driving my girlfriends 2004 nissan altima 2.5 down the highway on 2/15/2008 when the transmission down shifted and then directly upshifted hard. i got to my destination and tried to restart the car when i left it cranked longer than usually, in fact unusually long but it did start up. i got back on the highway to go home and while getting on the on ramp to the highway the car shut off and the steering wheel locked up and the service engine soon light came on. i did what i could to get the car to the shoulder and waiting a couple of minutes and tried to restart the car. i did get it restarted and took city streets to autozone to have the codes read from the service engine soon light. i had 2 codes, one being p0725 and p0355. i once again took city streets home to avoid the same thing happening going 70mph. i got it home that friday the 15th and put it in the garage. i got online and went to nissanclub.com and researched the problem. i found out that the p0335 is the crank position sensor malfunction and that caused my code of p0725 being the engine speed sensor. through researching this is a very big problems with the 2002-2006 altimas, mainly the 2.5 4cylinders. nissan issued a recall for the 2002-2005 and 2006 altimas but failed to include the 2003 and 2004 in it. now why would they not put the same faulty sensors in the 2003's and 2004's and skip ahead and put them in the 05's and 06's. i went to the dealership on monday the 18th to verify her car was not included in the recall and it wasn't. this is nissans deliberate attempt to not take full responsibility for the faulty crankshaft position sensors put in the 2002-2006 altimas. i paid for the $30.00 sensor, also another $30 sensor that is recommended replaced with the crankshaft sensor and spent 3 1/2 hours outta my day to replace the hard to get sensor. it is my belief that nissan needs to include the 2003 and 2004 altimas in the recall with the 2002-05, 06. *tr

On 2/5/08 we started our 2004 nissan altima and had no power steering. upon observation the serpentine belt was not turning. we had the car towed to the mechanic and found that the bolt on the main pulley on the crankshaft had fallen out and the pulley had fallen off of the crankshaft. had this occurred while driving down the interstate at 65mph, the results could have been horrific possibly leading to fatalities. *tr

Tl*the contact owns a 2004 nissan altima. the vehicle would not start and the check engine warning light illuminated. the vehicle finally started after 2 or 3 attempts. the dealer stated that the crank angle sensor failed and they reprogrammed the ecm. the manufacturer stated that the vin was not included in nhtsa campaign id number 06v242000 (engine and engine cooling). the current and failure mileages were 77,750.

Tl*the contact owns a 2004 nissan altima. while driving 65 mph or lower, the vehicle acts as if it will shut off. sometimes the vehicle stalls and will not even start. when the accelerator pedal is depressed, the vehicle will not pick up speed. the vehicle will not exceed 30 mph. also, when driving, the vehicle jerks back as if it will shut off. the dealer stated that the crank position sensor needed to be replaced; however, the contact stated that it was replaced last year. the dealer also stated that the speed sensor failed. nhtsa campaign id number 06v242000 (engine and engine cooling) was referenced. the current mileage was 74,000 and failure mileage was 69,000.

Tl*the contact owns a 2004 nissan altima. on a few occasions, while driving at any speed, the gears slipped and jolted when shifting between first and second gears. while idling at a traffic light, the vehicle shut off. the check engine light illuminated, dimmed briefly, and has remained illuminated ever since. her vin was not included in nhtsa campaign id number 06v242000 (engine and engine cooling). the failure mileage was 44,000.

Tl*the contact owns a 2004 nissan altima. while driving 35-40 mph or idling at a traffic light, the vehicle stalls. the contact has had to stand on the brake pedal in order to stop the vehicle. he currently drives as slow as possible because he does not know when the failure will recur. the dealer stated that when and if he receives a safety recall notice, they will make the repair. until then, the contact is responsible. nhtsa campaign id number 06v242000 (engine and engine cooling) was referenced. the current and failure mileages were 79,488. updated 01/17/08 *bf updated 01/14/07 *tr

Nissan altima 2004. has around 91,000 miles. transmission jerk a little, like it was jumping into gear. car shut off with no warning while going down a hill. i was able to put the car in neutral while coasting and restart the car. three days later the engine shuts off again. the vehicle was at a light. this time it took several tries to start the vehicle. at a busy intersection it stopped again the same day but was able to restart. i took the car to a dealership (car is in germany due to military). they told me they would call me back. i have not received a call. i called nissan north america and i was told that the car falls under 2 recalls. both the valve screws and the sensor. i may end up having to pay for it all even though nna says they "should" handle it here. *tr

Tl*the contact owns a 2004 nissan altima. the contact stated that although the engine module was reprogrammed, the vehicle still stalls. the crank position sensor was faulty. while driving 35 mph, the vehicle stalled in the middle of the road. the failure also occurs when the brake pedal is depressed. the vehicle must reprogram itself before it can be restarted. the contact received a recall notice from nissan and took the vehicle to the dealer for repair; however, the failure still persists. the recall number was unknown. the current and failure mileages were 60,000.

One month ago i was driving on the expressway when my car, that had never given me anything but usual minor problems, suddenly stopped while running at low speed. i panicked, but managed to pull over before it completely stopped running. i managed to turned it on once more but it was not running the same. it appeared it was going to shut off when slowing down again. it did. fortunately no one was hurt. i immediately took it to the dealer who explained there was a problem with the sensor. they could only recap a sensor but would need more extensive and expensive work to see if there was anything wrong with the computer. two days later, i learned of a manufacture?s recall for my make of car. it was a sensor problem that made the engine shut off when driving at low speeds. i concluded my car had to among those recalled. now i learned, the year of my car is not included, but the years surrounding are. *tr

Engine stalls while driving, engine hard to start, service light on with diagnostic test shows crankshaft position sensor and vehicle speed sensor bad. *tr

Car began stalling at idle and also sometimes on acceleration from a stop - i had cleaned the air filter and tried 2 tanks of premium gas but to no avail. *tr

Tl*the contact owns a 2004 nissan altima. while driving 35 mph, the check engine light illuminated three different times. the vehicle was taken to the dealer and they stated that the crankshaft and camshaft sensors needed to be replaced. the dealer replaced the sensors. on march 14, 2008, the check engine soon light illuminated again. the dealer stated that there was exhaust failure. nhtsa campaign id number 06v242000 (engine and engine cooling) was referenced. the vin, engine size, purchase date, and powertrain were unknown. the current and failure mileages were 67,000.

Tl*the contact owns a 2004 nissan altima. while making a turn, the vehicle completely shut off without warning and had to be restarted. in november of 2007, the contact received a recall notice for nhtsa campaign id number 06v242000 (engine and engine cooling) to reprogram the ecm. in december of 2007, the vehicle was still experiencing the same failure. the contact was informed that the crankshaft position sensor needed to be replaced. currently, the vehicle is still shutting off. on june 21, 2008, the ecm was replaced. the speed was unknown. the current mileage was 94,613 and failure mileage was 79,000.

Tl*the contact owns a 2004 nissan altima. on october 9, 2008, while stopped at a traffic light, the engine shut down without warning. the contact noticed that the engine normally shuts down when the vehicle is driven for several hours. the vehicle was taken to a repair shop for a diagnosis, which indicated that the electronic control module failed. the manufacturer took a report and stated that his vin was not included in nhtsa campaign id number 06v242000 (engine and engine cooling). the failure mileage was 84,000 and current mileage was 85,000.

Tl*the contact owns a 2004 nissan altima. the contact received a recall notice regarding the ecm, which causes the vehicle to shut off. the failure occurred while driving approximately 40 mph. she took the vehicle to the dealer and they informed her that the notice was sent out mistakenly. she notified nissan, but has not received a response. the recall number was unknown. the current and failure mileages were 70,000. updated 12/12/2007 *bf the consumer stated nissan refused to repair the vehicle, however the vehicle was repaired through carmax using the extended warranty. updated 12/12/07 *tr

On 10/9/2007 i took the vehicle into sheehy nissan to have it repaired for the known recalls. on 10/11/2007 i retrieved my vehicle for sheehy nissan and was told by alan shurkin the issue with the ecm reprogramming had been corrected. about 20 mins after leaving sheehy nissan lot my car again stalled and stopped running. on 10/14/2007 i called alan shurkin @ sheehy nissan and told him that my vehicle was having the same problem and i thought that it was due to the recall i was told by alan that it would be a service charge to repair it again. i have been driving this vehicle for about three weeks now with the consist stop and go routine. i was advised by a friend to call nissan north america back letting them know what my problem was. on 11/6/2007 i placed a call to nissan north america. i expressed my concerns with the rep who took my call she did a little research and stated to me that it seemed the issue i was still having was pertaining to the recall for the ecm and that she need to forward me to a regional research rep. i was forwarding to the regional research rep who stated to me that they had to look in to the problem further and that someone would be in contact with me within 24 hours. *tr

Tl*the contact owns a 2004 nissan altima. while driving approximately 65 mph, the engine suddenly shut off. the contact waited five minutes to restart the vehicle, but nothing happened. he tried again fifteen minutes later and the engine turned on and everything worked normally. two weeks later, he received a recall notice regarding the crank shaft sensor and ecu module. the dealer reprogrammed the ecu module and replaced the crank shaft sensor. the contact was charged for the crank shaft sensor replacement. the recall number was unknown. the current mileage was 35,000 and failure mileage was 33,000.

My vehicle started to have a hard shift while i was riding down the beltway. the car would shift so hard that it felt like someone had hit my car from behind. approximately two weeks later the "service engine soon" light came on. i took it to sheehy nissan of waldorf and had the car repaired. that cost me around $170.00. about two weeks later the hard shifts were back. one and a half months later my "service engine light" comes back on and this time my car will not start. i was literally stuck until i was informed that eventually the computer will click and let the car start. i eventually got the car to start and took it to the nissan dealer. i was informed that the crankshaft position sensor was bad. i have to pay another $230.00. to get my car back. the problem is that they have recalled this same problem on the 2002 and the 2003 nissan altima but not on the 2004. *jb

2004 nissan altima 2.5 had severe missing issue and dealer advised that it was an issue with the screws of the power ring on the intake manifold. the screw had came loose and damaged the intake manifold. nissan has voluntary service campaign qr25de power valve ( p5202) for this issue. my car has the exact issue and the year and engine size is the same. the vin number of my car is within the posted vin's of this campaign - however they now say the "campaign" is vin specific, and you guessed it - my vin isn't on their list. $700.00 later the dealer won't pay, nissan america refuses to honor the fix listed in their own campaign this is a known design flaw issue, same car, same engine size, within the vin numbers listed. no relief. they also replaced all the screws with "upgraded screws" and lock each screw. the internet is filled with this issue and others with no assistance. please make this a recall !*jb

Tl*the contact owns a 2004 nissan altima. while driving 35 mph, the vehicle stalled four times. the dealer stated that the crank sensor failed. the powertrain was unknown. the current and failure mileages were 48,727.

In the summer of 2007 my car was stalling when coming to a complete stop or when slowing down. i brought my car into nissan dealership and they advised the problem i was having is part of a recall and reprogrammed the ecm. the night i picked my car up i was still having the stalling issue. i brought the car back into the dealer and they replaced the camshaft sensor. i would like to make the complaint that 1) i never received a recall notice for the ecm. 2) my car stalled in oncoming traffic luckily not involved in a crash. 3)why was this problem not found when i originally brought the car in to be fixed 4) knowing this is an ongoing issue with both the crankshaft and camshaft sensor in nissans why is the camshaft not covered under a recall campaign. 5) it cost me almost $300 to replace a part that cost less than $40. *tr

Tl*the contact owns a 2004 nissan altima. the contact took her vehicle to the dealer to reprogram the ecm system. the dealer stated that the engine light illuminated after the repair was performed. the contact stated that she received safety recall # 03v455000 for engine and engine cooling. the dealer stated that the only safety recall on her vehicle was for the ecm system. the engine size was unknown. the current and failure mileages were 38,700.

This is the second time the diagnostic test has reported the crankshaft sensor is bad. this causes the car to hesitate, quit going down the road & not to start. we replaced the sensor & within 2 days the ses light was back on. the car ran fine for about 6 months then back to the same thing! *tr

2004 nissan altima. consumer states vehicle stalled while driving*tgw the consumer stated there is still a major problem regarding the recall for the crank angle sensor and the reprogramming of the ecm. the consumer stated the crank sensor had to be replaced for the second time and the check engine light had illuminated on six separate occasions. the radiator was cracked and was leaking coolant. the passenger side mirror was loose, the sun roof had a rattle and the drivers side window would go up, but at times it would come back down on its own. the dealer replaced the regulator motor. also, the alternator was replaced. *jb

I have a 2004 nissa altima and i have been feeling big jerks in the car while driving and now i am having trouble starting my car. the check engine light is on and i had it checked and was told that my crank sensor is shut down and will eventually make my car not start at all and can leave me stranded. i was also told that this is something that should not be happening to a car that is a 2004 and that this is a major malfunction that will cost a lot of money. *jb

2004 nissan altima with a recall for the intake manifold. consumer states that he did not receive the recall notice. his vehicle began shaking violently and the check engine light illuminated due to the defect of the intake manifold. *kb the consumer took the vehicle to his mechanic, who discovered that the flap from the intake manifold had worked its way loose and fallen inside the engine. the flap was unable to be re-attached independently and the entire intake manifold had to be replaced. *jb

Tl*the contact owns a 2004 nissan altima. while driving 10 mph on a clear day, the vehicle failed on three occasions. after each occasion, the vehicle restarted momentarily. the contact stated that the crank angle sensors needed to be replaced. the engine size was unknown. the current mileage is 67,000 and failure mileage was 65,856.

I own a 2004 nissan altima, in april 07 i experienced the service engine light coming on and i took it to a dealer and paid to have the crank sensor replaced. i subsequently received a recall letter for the same problem and contacted nissan where i was told that i was eligible for a reimbursement. after faxing all the relevant information, i was told after waiting 3 months that i was denied a reimbursement because the recall time had lapsed. i don't think i was treated fairly as nowhere in the recall letter it stated any expiration date. i do believe i am due a reimbursement. i would appreciate your looking into this matter. thanks much yvette buckland *tr

Tl*the contact owns a 2004 nissan altima. the contact received recall notice # 06v242000 (engine and engine cooling). however, she had the repair work performed prior to receiving the notice. she has contacted the manufacturer about reimbursement and they have yet to respond. the engine size was unknown. the current and failure mileages were 70,000. returned usps, 2nd attempt made 06/08/07 failed. *lj

Tl*the contact owns a 2004 nissan altima. the contact stated that the vehicle's crank shaft position sensor was replaced because the engine sensor light illuminated on the instrument panel. as noted in recall # 06v242000 (engine and engine cooling), a repair was performed to reprogram the engine computer on march 28, 2007. the vehicle continued to shut off due to failure between the crank and the engine computer. when the contact had it replaced, the dealer stated that she was unable to get reimbursed for the recall repair. the manufacturer told her to contact nhtsa due to the difficulty of being able to reimburse those affected by the recall. the current mileage is 60,500 and failure mileage was 59,000. the consumer has provided a copy of the invoice of service and a copy of the recall letter. update 05/22/07*tr

Tl*the contact owns a 2004 nissan altima. while driving the vehicle at any speed it would shut off without warning. the vehicle would sometimes restart immediately and sometimes she would have to wait approximately fifteen minutes to restart. there is a recall for the electronic control module (recall #06v242000). the dealer reprogrammed the ecm sensor however, that did not solve the problem. the vehicle continued to shut off without warning. the dealer stated that the crank and cam angle sensor should be replaced. the replacement has not been made. the failure mileage was unknown and the current mileage was 66,700.

To whom it may concern at nhtsa: i own a 2004 nissan altima with a 2.5l engine. i recently received an owner notification letter from nissan north america for a safety recall due to the potential that the engine might stop running while being driven due to an electrical problem between the crank angle sensor and the electronic control module (ecm). this could result in a crash without warning. *ak the notice further advised that my nissan dealer would reprogram the ecm, free of charge. this service should take about 1 hour to complete. i made arrangements with my dealer to have this service performed on my altima. while in for this service, i was called by the dealer and notified that several unrelated service items were found. they did not force them on me but did they did take the opportunity to 'sell' them....better gas mileage (clean throttles) and brake performance (replace brake fluid). well, the free service to 'reprogram' the ecm, turned into a service bill in the $450.00 range. the list cost to reprogram the ecm was $58.00. so, i avoided a $58 charge but was 'sold' additional services so nissan actually generated close to $400 in revenue on a 'free' recall. the nhtsa recall number is 06v-242. it occurred to me that if 100,000 other concerned altima owners responded to the recall, were 'sold' similar 'needed' service, nissan would collect $40,000,000 in service fees.....a minor reprogramming recall could turn into a large profit generating machine. i wanted to share my situation with you because this simple scheme, if indeed employed, would take advantage of the public and make publicly-owned corporations like nissan a profit windfall. i can be reached at [xxx]or [xxx] if you would like to contact me or discuss this situation further. thank you for your careful consideration. sincerely, [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6). *tr

2004 nissan altima, 43k miles. had recall on a similar sounding situation (car can stall at low speeds due to a temperature sensor malfunction, but dealer claimed that the cam and crank sensors needed to be replaced...car stalled in the parking lot and middle of the road, 2 times each. extremely dangerous and unacceptable. *jb

Tl*- the contact has a 2004 nissan altima and stated that she took the vehicle to get a recall work performed on the crank shaft position at the dealer. on march 20, 2007 the vehicle stalled out while driving at 35 mph. the contact had the vehicle towed into the dealership and they replaced the crankshaft. the contact felt that she shouldn't have to pay for the repair since the recall repair should fix the failure with the crankshaft. the current and failure mileage were both 67,812 miles.

Tl* the contact owns a 2004 nissan altima. the contact stated that the vehicle has a safety recall for the crank positioning sensor. the contact at the scheduled appointment, was denied the service because he would not pay for the diagnostic test. *ak

Car wouldn't start on several occasions in early 2007 (february timeframe). i brought the vehicle into a nissan dealership. they said there was a recall and the ecm needed to be reprogrammed. after that was done, i brought it back in 2 days later and they said the crankshaft position sensor needed to be replaced. i paid them to replace it ($152.07) and the issue of not starting has not since reappeared. i have since found that recalls for this make/model have been issued for model years 2003, 2005 and 2006 of the altima to have their crankshaft position censors replaced, but not for 2004 altima. *tr

Tl*- the contact owns a 2004 nissan altima with an odometer reading of 130000 miles. the contact received recall 06v242000. when he went to the dealer they charged him for checking the catalytic converter. the contact took the vehicle to another nissan dealer, and they told him that the catalytic converter was fine. the contact called the manufacturer, but they had not returned the call. there had been no failures to date.*ak

Tl* - the contact owns a 2004 nissan altima. the contact stated that the vehicle ha 2 safety recalls the contact stated that one week ago while dring 65 mph the vehicle stalled ,stopped on the freeway with no notice, and afterwards the check engine light turned on. the contact stated that the safety recall repair was free. however, the dealer tried to charge him for diagnosing the vehicle. the contact was told two weeks prior that the engine had been reprogrammed. the contact had been waiting for nissan to call, has not been driving the vehicle for one week, and still has not heard from nissan. the contact was afraid to drive the vehicle now. the weather was not a factor in the failure. the current and failure mileage were both 32000.*ak

Car stalls and stops running on a day basis while being driven and servic engine soon light is on. nissan dealer reprogrammed ecm, car still stalls, service engine light soon still on. i have almost been in several accidents due to car quitting and power brakes and steering shutting down while driving. nissan not taking care of problem. *jb

I am the owner of a 2004 nissan altima. presently the engine needs repairing. i took my car to crown nissan in greensboro,nc to be serviced. after a diagnostic test, the servicemen informed me that my power valve screw came loose falling in the engine causing it harm. i asked about the recall on this vehicle i was informed there was none at the present time. this occurred on nov 16th, 2006. he informed me that the price to fix it was between 500-4000 depending on the extent of the damage. after some research i came across other nissan altima owners experiencing the same problems on nissanhelp.com. i recovered a past recall on this vehicle with the stated problem. i called nissan and they told me my car was not included even though my vin number is stated in the report. i am trying to reinstate this recall due to the false statements i have received from nissan. thanks. tiajuana bennett greensboro,nc 336-334-2951. *nm

I received a recall notice regarding the crank angle sensor that was defective. i had previously had the vehicle repaired at nissan and paid $284.60 for the repair. i contacted nissan and faxed the requested documentation to the manufacturer. after 3 faxes, 2 dealership repair documentation and numerous hours spent with india nissan customer service i have not received a refund from nissan as promised by several representatives and managers. *tr

Engine service soon light came on and took car to the shop on 10/31/06. at the time it came on there were no running problems. nissan dealer replaced rear 02 sensor and diagnoses and reprogrammed engine control module. on 11/20/06 (less than three weeks later) the "engine service soon light" came on again. prior to taking the car there were no running problems. nissan dealer checked vehicle and called me and said that they need to run another diagnostic test for another fee. when i went to the dealership the vehicle was idling up an down and would accelerate on its own without touching the accelerator. p2135 throttle position sensor found, replaced sensor and cleared codes. i was charged on both occasions for a total of $668. *jb

Dt*: the contact stated while driving 40 mph, the vehicle stalled without warning. it was maneuvered off the road and restarted. the vehicle was driven to the dealer who could not duplicate the problem.

My husband and i were driving when the car started to jerk and run very rough. not long after that the check engine light came on and it just shut off right in the middle of traffic. aaa towed the car to cerritos nissan. the next day they looked it over and said it was a chamber and a mass air filter and injector a. they gave us the total of $1384. we had no choice i needed my car, so we told them to fix it. when we went to pick the car up,we paid our bill, i drove off and it started doing the same exact thing. we took the car back and the head of service was there. my husband tried to explain to him but he was not understanding. my husband ask if he would go on a test drive with him. my husband asked him to drive. when they came back, my husband said not only was it doing the same thing but it cut off on them as well. the service manager said he would write a note about what it was still doing. we had just begrudgingly forked out nearly $1400 and the car was doing the same exact thing. we were upset and wanted to know what did they fix? he assured us that they would fix it. he asked us what we wanted him to do. my husband said that we just needed a rental. he agreed and set us up with one. finally we were able to pick the car up and while it still ran a bit rough it didn't jerk and it didn't cut off. we ask what was wrong with it and they said it was something with the engine 9500 int and enterprise inv d907447 po 151165. so we asked why we were charged for all that other stuff. he said cause it still needed it. and at this time we also had asked about recalls. they said there were none. ironically in going through our old a few months later mail we found a safety recall notice that talk about everything that my car did. we notified our lawyer and ask if we should proceed and he told us to first report it and see what happens. although i really like my altima i have had to ...

Dt*: the contact stated the vehicle's engine power valve screws located in the intake manifold came loose and cut into the catalytic converter. the check engine light illuminated and the engine began to idle roughly. due to this, the bolt damaged one of the piston valves causing the need for a new engine. updated 10/25/2006 - *nm