# Mazda 3 check engine light: complaints, recalls and what to do **Verdict:** Drive to a shop this week - **Owner complaints:** 26 - **Most complaints:** 2018 (7) - **Related recalls:** 4 - **Verdict:** This week ## Quick answer NHTSA has 26 owner complaints about the check engine light on the Mazda 3 (2015-2026 models), most for the **2018** model year (7). There are **4 recalls** for related parts; check yours by VIN. Drive to a shop this week: With a steady light and a car that drives normally, yes, it is usually safe to keep driving for a few days while you get the code read. ## Mazda 3 check engine light complaints by model year | Model year | Complaints mentioning the check engine light | All complaints that year | Share | | --- | --- | --- | --- | | 2015 | 5 | 129 | 4% | | 2016 | 5 | 103 | 5% | | 2017 | 2 | 84 | 2% | | 2018 | 7 | 110 | 6% | | 2019 | 6 | 74 | 8% | | 2021 | 1 | 54 | 2% | Counts are complaints filed with NHTSA whose description mentions this light. They show where owners have had trouble, not a failure rate: popular years collect more complaints simply because more cars are on the road. ## Mazda 3 recalls related to the check engine light **[21V875000](https://www.nhtsa.gov/recalls?nhtsaId=21V875000)** (2018 models, reported 2021-11-12): Fuel pump failure may cause an engine stall, increasing the risk of a crash. **Remedy:** Dealers will replace the fuel pumps, free of charge. Owner notification letters were mailed July 18, 2022. **[16V685000](https://www.nhtsa.gov/recalls?nhtsaId=16V685000)** (2016 models, reported 2016-09-23): A fuel leak in the presence of an ignition source increases the risk of a fire. **Remedy:** Mazda will notify owners, and depending on the tank lot number, dealers will inspect the recirculation pipe weld, replacing the fuel tank, as necessary, free of charge. The recall began November 1, 2016. **[16V684000](https://www.nhtsa.gov/recalls?nhtsaId=16V684000)** (2015-2016 models, reported 2016-09-22): A fuel leak in the presence of an ignition source increases the risk of a fire. **Remedy:** Mazda will notify owners, and depending on the tank lot number, dealers will inspect the ICV weld, replacing the fuel tank, as necessary, free of charge. The recall began November 1, 2016. **[15V621000](https://www.nhtsa.gov/recalls?nhtsaId=15V621000)** (2015-2016 models, reported 2015-10-02, **park outside / do not drive advisory**): A fuel leak in the presence of an ignition source increases the risk of a fire. An engine that stalls increases the risk of a crash. **Remedy:** Mazda will notify owners, and dealers will inspect the vehicle's fuel shut-off valve. As needed, the fuel shut-off valve and the affected fuel tank emissions system components will be replaced, free of charge. The recall began on October 20, 2015. Owners are advised not to drive their vehicle until the repairs have... Recall repairs are free at any Mazda dealer. Enter your 17-character VIN at [nhtsa.gov/recalls](https://www.nhtsa.gov/recalls) to see whether yours is still open. ## What Mazda 3 owners report - "Check engine light came on. Speed limited by car. Continues to vibrate especially at idle from cold start. Code P0304 intermittently popping up." -- owner of a 2021 Mazda 3, complaint filed 2025 - "I've had to jump the car to start it and then the check engine light and engine malfunction warning messages appear on the panel. I've had the battery tested and told it wasn't the battery." -- owner of a 2019 Mazda 3, complaint filed 2022 - "The contact stated that while driving uphill at 45 MPH, the vehicle sputtered, hesitated to accelerate, and the check engine warning light illuminated. When the contact firmly depressed the accelerator pedal, the engine made a knocking noise, and the vehicle stalled. Diagnostic testing at AutoZone retrieved DTC..." -- owner of a 2018 Mazda 3, complaint filed 2026 Excerpts from complaints filed with NHTSA, lightly cleaned for reading. They are owners' own accounts and have not been verified. ## What the check engine light means The check engine light means the engine computer has stored a diagnostic trouble code for an emissions, engine or transmission fault. Common causes include a loose gas cap, a failing oxygen sensor, a worn catalytic converter, and misfires from plugs or coils. A steady light is usually not an emergency, but a flashing light means a severe misfire and you should reduce speed and get it checked right away. The most common causes, on any make: 1. **Loose gas cap or EVAP system leak** (common) 2. **Failing oxygen sensor** (common) 3. **Catalytic converter efficiency below threshold** (common) 4. **Misfire from worn spark plugs or ignition coils** (common) Full causes, what to do and how to reset it: [Check engine light](/warning-lights/check-engine). ## Frequently asked questions ### Is there a recall for the Mazda 3 check engine light? Yes. NHTSA lists 4 related recalls (21V875000, 16V685000, 16V684000, 15V621000) covering 2015-2018 models. Recall repairs are free; check your VIN at nhtsa.gov/recalls to see if yours is open. ### Which Mazda 3 years have the most check engine light complaints? In NHTSA's database the 2015, 2018 and 2019 3 model years have the most complaints mentioning the check engine light, with 7 for 2018. Complaint counts reflect how many cars were sold as well as how often problems happen. ### Is it safe to drive a Mazda 3 with the check engine light on? Drive to a shop this week. With a steady light and a car that drives normally, yes, it is usually safe to keep driving for a few days while you get the code read. If the light is flashing, the engine runs very rough, or the temperature or oil light also comes on, stop driving and have it checked. ### How do I check if my Mazda 3 has an open recall? Enter the 17-character VIN from your dashboard or registration at nhtsa.gov/recalls, or ask any Mazda dealer. Open recalls are fixed free of charge, even if you are not the first owner. ## Sources - [NHTSA: Vehicle safety complaints and recalls (api.nhtsa.gov)](https://www.nhtsa.gov/nhtsa-datasets-and-apis) - [NHTSA: Check for recalls by VIN](https://www.nhtsa.gov/recalls) ## Other Mazda 3 warning lights - [Airbag (SRS) warning light](https://diagxcar.com/warning-lights/airbag/mazda-3): 13 complaints - [Brake warning light](https://diagxcar.com/warning-lights/brake/mazda-3): 22 complaints - [Coolant temperature warning light](https://diagxcar.com/warning-lights/coolant-temperature/mazda-3): 6 complaints - [Oil pressure warning light](https://diagxcar.com/warning-lights/oil-pressure/mazda-3): 10 complaints ## Check engine light on other models - [Ford Escape](https://diagxcar.com/warning-lights/check-engine/ford-escape): 2245 complaints - [Ford Edge](https://diagxcar.com/warning-lights/check-engine/ford-edge): 1380 complaints - [Chevrolet Silverado](https://diagxcar.com/warning-lights/check-engine/chevrolet-silverado): 911 complaints - [Kia Soul](https://diagxcar.com/warning-lights/check-engine/kia-soul): 785 complaints - [Hyundai Sonata](https://diagxcar.com/warning-lights/check-engine/hyundai-sonata): 731 complaints - [Hyundai Tucson](https://diagxcar.com/warning-lights/check-engine/hyundai-tucson): 705 complaints - [Chevrolet Malibu](https://diagxcar.com/warning-lights/check-engine/chevrolet-malibu): 666 complaints - [Chrysler Pacifica](https://diagxcar.com/warning-lights/check-engine/chrysler-pacifica): 630 complaints - [Hyundai Santa Fe](https://diagxcar.com/warning-lights/check-engine/hyundai-santa-fe): 602 complaints - [Jeep Cherokee](https://diagxcar.com/warning-lights/check-engine/jeep-cherokee): 587 complaints ## Mazda 3 - [Mazda 3 specs and mpg by year](https://diagxcar.com/vehicles/mazda-3) --- Source page: https://diagxcar.com/warning-lights/check-engine/mazda-3 Updated: 2026-11-04 General information, not a substitute for a qualified mechanic.