How To Protect Subaru Forester’s Catalytic Converter From Being Stolen?

By Nick Marchenko, PhD

The Subaru Forester, with its iconic boxer engine rumble, houses a silent hero beneath its rugged exterior—the catalyst. This little-known component serves as the gatekeeper for the environment, ensuring toxic exhaust gases are tamed before they can cause harm.

Environmental regulations aren't just a tick in a box; the catalyst ensures your Forester runs with the grace and efficiency Subaru intended. Without it, you're looking at increased fuel consumption, a juddery engine, and a reduced lifespan of the vehicle.

The Forester’s catalytic converter might seem like an obscure part, but its importance isn’t lost on some. It’s packed with precious metals, making it a tantalising target for would-be thieves.

While its design is pure function, Subaru hasn’t given it an iron-clad defense against theft. Easily accessible, thieves have a field day unless you take precautions. It's gut-wrenching to think a few minutes could land you with a hefty repair bill.

This piece will steer you through the twists and turns of safeguarding your Subaru Forester's catalytic converter, ensuring you don't get taken for a ride.

Heads up! Pinching a catalyst isn't just cheeky; it's illegal, attracting fines and possibly a stint behind bars.

Which cars are prime targets for catalytic converter theft?

Anyone with a post-1975 vehicle should be on guard, but thieves particularly fancy the newer, tech-loaded models.

The cleaner and greener your car, the juicier and richer its catalyst. Newer Subaru Foresters are particularly at risk, especially those boasting multiple catalytic converters.

Recent stats aren’t comforting. Catalytic converter thefts skyrocketed to 64,000 in 2022 in the US, a shocking leap from 16,000 in 2020. Thieves are out there, and they're hungry.

Subaru Foresters aren’t alone; these vehicles have also been hit hard:

• 1985-2021 Ford F-Series;
• 1989-2020 Honda Accord;
• 2007-2017 Jeep Patriot;
• 1990-2022 Ford Econoline;
• 1997-2018 Ford Explorer;
• 1999-2021 Chevrolet Silverado;
• 2005-2021 Chevrolet Equinox;
• 1997-2020 Honda CR-V;
• 1987-2019 Toyota Camry;
• 2011-2017 Chrysler 200;
• 2001-2021 Toyota Prius.

Guarding your Subaru Forester's catalytic converter from thieves

Replacing the catalyst can rev up costs between $1,000 and $3,000. Then there’s potential damage to your Forester and the hassle of downtime. Prevention, as they say in the rally stages, is better than cure. Don't let thieves take the shine off your Subaru.

Shield that catalyst

While Subaru has crafted the Forester with precision, the catalyst's defenses aren’t impregnable. It's on you to fortify it. Consider an iron frame to keep the catalyst snug and secure.

Opt for a frame that’s steadfast, capable of resisting cuts or bends. Sure, it’s an investment between 400 to 800 dollars, but it’s a drop in the ocean compared to potential repair costs.

Drench the catalyst in a can't-miss hue

Give that catalyst of your Forester a vibrant makeover with some heat-resistant paint. It'll stand out like a flamboyant rally car, potentially deterring would-be thieves from swiping it for resale.

It's not a golden ticket to safety, mind you, but it's better than letting your catalyst go incognito.

Stamp the Subaru Forester's plate & VIN on the catalyst

Engrave your Forester's number plate and VIN deeply onto the catalyst. Think of it as the car's tattoo—a unique identifier. Not only will it stand out like a sore thumb at a resale point, but it could also be a beacon for the police in a sea of generic parts.

Just like tuning your Forester for a bit more oomph, this method isn't a total theft deterrent, but it could very well throw a spanner in a thief's works. Go deep, make it big, and keep it clear.

Fuse the catalytic converter to the Subaru's underbelly

While the Forester's catalyst might be snugly bolted on, that's hardly Fort Knox levels of security. Consider welding it onto the car’s frame. Crafty fasteners, hidden from prying eyes, are the way to go.

But, a word of caution—don't overcommit. That catalyst might need replacing someday, and you wouldn't want to be wrestling it off the Forester after welding it on. Think of it as setting up the car's suspension: it's all about the right balance.

Rig an alarm on the Subaru Forester

Most Foresters come factory-fitted with an alarm, but when it comes to catalyst security, it's worth going the extra mile.

Install an alarm with a tilt sensor. Before any catalyst heist can take place, the Forester needs to be elevated. An ultra-sensitive alarm system will catch even the slightest incline, sounding off and ideally sending alerts straight to your pocket.

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Forester Parking 101

Visibility is your friend. Park that Subaru Forester where the world can see—busy places, under the gaze of security cameras, or guarded parking lots. And when the sun dips, find a cozy garage spot for the night.

Insurance: Not just a box to tick

But here's the rub: Even with all these tricks up your sleeve, there's no foolproof way to keep your catalyst safe. So, have a backup plan.

Check that insurance paperwork. Chat with the folks at the insurance company. Does your policy cover catalyst theft? If not, might be worth coughing up a bit more now to save a lot more later.

While the above stratagems can act as barriers, always be ready for the unexpected. After all, the open road is full of surprises, and not all of them are the fun kind.

How to spot if your Forester’s catalytic converter has been swiped:

When your catalyst gets the old heave-ho, believe me, you'll notice. Here's hoping you never have to use this intel, but if you do, here are the telltale signs of a missing catalyst.

The Roar of the Boxer:

Without the catalytic converter, your Forester will sound like it's got ambitions of tearing up a rally stage. The engine gets vocal, and the distinct Subaru Boxer rumble becomes even more pronounced.

Dashboard Alarms:

With the catalytic converter AWOL, don't be surprised if your Forester's dashboard throws a fit—flashing warnings and all. Modern Foresters have nifty sensors keeping tabs on the catalyst's performance. If it goes missing, the car's going to let you know about it.

Whiff of Exhaust Inside:

If suddenly your Forester smells more like a '70s rally pit than a modern car, that's a sign. With a compromised catalyst, exhaust emissions can sneak their way into the cabin—and trust me, that's not a scent you want to be inhaling.

Power Drop:

Ever felt your Forester's spirit take a hit? The catalytic converter is key to maintaining exhaust backpressure—a must for that punchy engine performance. Without it, you might feel like you're driving with the handbrake on—a distinct loss of oomph.

Thirsty Engine:

With the catalyst gone, your Forester's engine could start guzzling fuel like a thirsty rally car after a long stage. More fuel, same power—it's like pouring your money straight down the exhaust. Watch that fuel gauge—if it's racing towards "E", the catalyst might just be the culprit.

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Final Thoughts

The catalytic converter isn't just another part of the Subaru Forester—it's a guardian, working tirelessly to keep our air cleaner and our conscience clearer.

But with precious metals inside, it's also catnip for thieves. So, if you love your Forester—and I know you do—heed the advice in this piece. Let's keep those converters right where they belong.

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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