Mazda 3 Typical Problems - Skyactiv Engine Issues

By Nick Marchenko, PhD

The third generation of the Mazda 3 (BM, BN) was produced from 2013 to 2019 and was offered as both a hatchback and a sedan. This model is positioned in Mazda's lineup between the Mazda 2 and Mazda 6. A facelift was introduced in 2017, and its successor is the Mazda 3 BP.

Mazda 3 Engine Problems - Petrol

The "Skyactiv-G" engine range for the Mazda 3 III includes three variants with 100, 120, and 165 horsepower. These engines are four-cylinder units with either 1.4-liter (G 100) or 2.0-liter (G 120, G 165) displacements, and they are absolutely reliable when maintenance intervals are adhered to.

However, it's important to keep an eye on the oil level, as there have been occasional reports of increased oil consumption. According to the manufacturer, up to 0.8 liters per 1,000 kilometers (approximately 0.21 gallons per 621 miles) is still within the acceptable range, but this should not be ignored – especially at low mileage.

Mazda 3 Engine Problems - Diesel

Two diesel models were also offered: the Skyactiv-D 105 and Skyactiv-D 150.

A common weak point in all Mazda diesel engines is the diesel particulate filter (DPF), which can quickly reach its capacity limit due to frequent short trips. Successful regeneration of the DPF requires longer trips, which rarely occur in city driving.

Turning off the engine subsequently leads to the interruption of the regeneration phase, causing unburned fuel in the combustion chamber to mix with the engine oil. This results in gradual oil dilution and impending engine damage.

Regardless of the engine type, it's important to pay attention to recall actions (see below) and to keep an eye on typical diesel weak points at high mileage. These include:

• Dual-mass flywheel (DMF)
• Turbocharger
• EGR valve
• Injectors

Other Weak Points

• Crackling gear shifts
• Creaking suspension springs
• Jerking when starting to move
• Squeaking seats
• Slow infotainment system

Mazda 3 Recalls

The Mazda 3 III has been recalled multiple times. The following recalls affect a large number of vehicles:

• Due to micro-cracks in the impeller of the fuel pump, fuel can enter and cause the component to swell or deform. In the worst case, this can lead to the engine being starved of fuel and suddenly shutting down. Affected are BM/BN models from the production month of October 2017 onwards.
• For models produced until July 4, 2018, incorrectly programmed control software can lead to soot accumulation around the intake closing flap, potentially causing the engine to shut down suddenly. During the recall-related workshop visit, the control software is checked and updated if necessary.
• According to the KBA, the plastic connection between the tank and the filling and ventilation nozzle can break, leading to fuel leakage. Vehicles from the 2015 model year are affected.
• In models from 2015 to 2017, pressing the accelerator pedal to the floor in neutral or park can lead to abnormal combustion due to additional oil and fuel entering the combustion chambers, potentially causing engine damage. Affected models are specified by their VINs. A software update is the remedy.
• Due to metal deposits, power supply to the windshield wiper motor can be interrupted. Models from the production period July 20, 2015, to July 18, 2017, are affected.

Tip: Detailed information about the recalls can be obtained using the Vehicle Identification Number (VIN).

Mazda 3 Buyer's Guide: Petrol Over Diesel

The third generation of the Mazda 3 is once again a success. Compared to its predecessor, the Japanese have improved on reliability, applicable to both diesel and the already solid petrol engines. Prices in the common used car markets start at around $7,500.

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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