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Transmission and drivetrainPart report

2018 Mazda MAZDA6 Transmission and drivetrain Problems

Complaints
9about this part
Share
15%of 59 total for the year
Median mileage
8,600miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 9 complaints about the transmission and drivetrain of the 2018 Mazda MAZDA6, 15% of the 59 complaints for this model year. Where a mileage was given, the median is 8,600 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I got this car in may of 2019 so the car is still new and ever since I purchased the vehicle I've been having issues with it first were the calipers sticking and Mazda gave me a hard time to repair the issue after the fact knowing that it was a manufacturing isssue and still tried to charge me I took my vehicle there more then 15 times just to deal things going bad in my car. …”

NHTSA complaint #11311402, filed 2020-02, 11,000 miles

“Vehixle has open recall #3719f. Took vehicle in for service on july 15 and according to NHTSA recall has even out since june 27.2019. To this day I have not gotten any letter or anything stating car has open recall when the car can turn of randomly. Will be taking car in on 08/26/19 but I'm concerned as to why this has not been addressed in any letters or emails”

NHTSA complaint #11246313, filed 2019-08, 7,200 miles

“The front and rear suspension pops, clunks, the vehicle shakes, vibration also happens, it also causing tires to be replaced faster than normal they go bold in the center its causing now the axles to shake at night time you can see the reflection from headlights bouncing, they have TSB's on this suspension issue however not for 2018 only 14-16 Mazda 6s I believe and supposedly the issue was corrected well they lied because mine is a 18 and it is a disaster, my transmission is now shifting very hard from 1st to second gear, turn wheel it makes a loud clunk sound or popping sound, go over a…”

NHTSA complaint #11405090, filed 2021-03, 400 miles

“Noticed slight coolant leak, took car to mechanic, he stated cylinder head was cracked, & causing coolant to spray everywhere. Towed car to dealer. Was given repair estimate of over $11,000, for a new engine. I see a safety bulletin online for my year make & model car. This overheating can apparently cause an engine fire. So far, Mazda seems to be showing negligence & not properly addressing the issue for owners.”

NHTSA complaint #11581010, filed 2024-04

“I recently discovered a significant oil leak near the exhaust manifold of my 2018 Mazda 6 (2.5L NA), which has resulted in visible smoke and a burning oil odor. Upon taking the vehicle to the nearest Mazda dealership for a diagnosis, the service department informed me that the vehicle has suffered a cracked cylinder head. An active oil drip is visible behind the engine near the exhaust manifold immediately upon starting the car; consequently, the engine is leaking oil directly onto the exhaust components. …”

NHTSA complaint #11709431, filed 2026-01

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
2018915%
201735%
20161114%
2015813%
20141914%
201314%
201132%
201052%
200972%
200898%
20071711%
20062012%
20051913%
20041912%
20033621%
20021243%

Other parts of the 2018 Mazda MAZDA6

Engine
33 complaints
Other or unknown
10 complaints
Fuel system
7 complaints
Brakes
4 complaints
Electrical system
4 complaints
Suspension
3 complaints
Body and structure
2 complaints
Visibility (wipers, defrost, mirrors)
2 complaints
Wheels
2 complaints
Back-over prevention (rear camera)
1 complaints
Equipment
1 complaints
Seat belts
1 complaints

← All problems reported for the 2018 Mazda MAZDA6

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology