Pre-purchase inspection checklist — 2018 Mazda Mazda6
The 2018 Mazda6 is a solid used car option, though it faces possible fuel pump and engine issues. Owners have reported stalling engines due to software errors, and fuel pump failures have led to recalls. Checking for proper updates and repairs on these components is crucial.
Known issues to inspect
Engine stalling
How to check: Ensure engine software has been updated to fix the stalling issue.
Fuel pump failure
How to check: Examine maintenance records for fuel pump replacement.
Powertrain problems
How to check: Check for unusual sounds or shifting issues when driving.
General electrical faults
How to check: Test all electronics, including lights and infotainment.
Test-drive walkthrough
- 01
Cold start
What to check: Check for long crank or stalling when starting.
Red flag: Difficult or failing start-up.
- 02
First minute idling
What to check: Listen for unusual engine noises or rough idling.
Red flag: Rough idle or knocking sounds.
- 03
Low-speed driving
What to check: Notice any hesitations or jerking when accelerating.
Red flag: Hesitation or jerking in response.
- 04
Highway acceleration
What to check: Ensure smooth and consistent engine power and response.
Red flag: Loss of power or surging issues.
- 05
Braking
What to check: Feel for vibrations or unusual sounds when braking.
Red flag: Vibration or grinding sound.
Questions for the seller
Use this exact phrasing.
- Has the fuel pump been replaced?
- Were any engine repairs made?
- Are there software updates on the PCM?
- Were there any transmission issues?
- Have all recalls been addressed?
Documents to request
Don't sign anything until you have these.
- Recall repair records
- Maintenance logs
- Engine software update logs
- Fuel pump replacement receipt
- PCM update documentation
Generated by gpt-4o on 8/24/2026. Grounded in the NHTSA recall corpus and owner-complaint patterns for the 2018 Mazda Mazda6.