2018 Mazda Mazda6: Reliability, Recalls, Known Issues & Cost to Own
Data last updated 2026-07-04 · sources listed throughout · based on public NHTSA data
Major refresh added the 2.5T turbo and a richer interior, but the cracked-cylinder-head casting defect is the year to inspect for coolant/oil leaks. 2 known issue patterns are documented below, with frequency and the mileage windows where they typically appear. New, the 2018 Mazda Mazda6 ranged from $21,950 to $34,750 depending on trim (base MSRP, before options and destination).
This listing
Context from the listing you were viewing, not a market-price judgement.
Major refresh added the 2.5T turbo and a richer interior, but the cracked-cylinder-head casting defect is the year to inspect for coolant/oil leaks.
Sources (2)
- api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=mazda6&…
- repairpal.comhttps://repairpal.com/reliability/mazda/mazda6
Known issues
-
Cracked cylinder head from a casting defect, leaks coolant and/or oil onto the exhaust manifold (a fire-risk in severe cases). Reported on both the 2.5L naturally-aspirated and the 2.5T turbo engines; Mazda has acknowledged it on turbo units. Watch for coolant loss and burning-oil smell.
occasional · 25 NHTSA complaints · engine
-
Elevated engine oil consumption, low-oil warnings between changes with no visible leak, the subject of an owner-noted technical service bulletin on the later third-gen cars.
occasional · 11 NHTSA complaints · engine
Based on public NHTSA complaint data and AI synthesis: patterns, not guarantees.
Sources (2)
- api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=mazda6&…
- api.nhtsa.govhttps://api.nhtsa.gov/complaints/complaintsByVehicle?make=mazda&model=mazda6&…
Recalls & safety
Recall history hasn't been loaded for this model year yet.
Whether a recall is still open on a specific car depends on its VIN. Check it free at NHTSA's VIN lookup (nhtsa.gov/recalls), or ask the seller for proof the repair was done.
Pros & cons
Pros
- Class-leading handling and driving dynamics for a midsize sedan
- Excellent SkyActiv fuel economy, with available 2.5T turbo torque from 2018
- Upscale, genuinely premium-feeling interior, especially the 2018+ Signature trim
- Strong crash-safety scores and handsome styling
Cons
- Tight rear-seat headroom owing to the sloping roofline
- Noticeable road and wind noise on the pre-2018 cars; small infotainment screen
- No all-wheel-drive or hybrid option was ever offered, and the model is now discontinued
Trims & original pricing
| Trim | Original base MSRP | New today | Engine | MPG |
|---|---|---|---|---|
| Sport | $21,950 | discontinued | — | — |
| Touring | $25,700 | discontinued | — | — |
| Grand Touring | $29,200 | discontinued | — | — |
| Grand Touring Reserve | $31,700 | discontinued | — | — |
| Signature | $34,750 | discontinued | — | — |
Prices are base MSRP for each trim's standard configuration. Options, packages, and destination charges added to what original buyers actually paid.
Sources (1)
- iseecars.comhttps://www.iseecars.com/car/2018-mazda-mazda6-price
Cost to own
| Repairs (rises with mileage) | ≈ $450–500/yr |
| Expected lifespan | ~200k miles |
National-average estimates based on public data. Your costs vary by region, driver, and condition.
Sources (2)
- repairpal.comhttps://repairpal.com/reliability/mazda/mazda6
- fueleconomy.govhttps://www.fueleconomy.gov/ws/rest/vehicle/41265
Frequently asked questions
What problems does the 2018 Mazda Mazda6 have?
Documented issue patterns include: Cracked cylinder head from a casting defect, leaks coolant and/or oil onto the exhaust manifold (a fire-risk in severe cases). Reported on both the 2.5L naturally-aspirated and the 2.5T turbo engines; Mazda has acknowledged it on turbo units. Watch for coolant loss and burning-oil smell; Elevated engine oil consumption, low-oil warnings between changes with no visible leak, the subject of an owner-noted technical service bulletin on the later third-gen cars. Frequency is based on public NHTSA complaint data: patterns, not guarantees.
Is the 2018 Mazda Mazda6 reliable?
Major refresh added the 2.5T turbo and a richer interior, but the cracked-cylinder-head casting defect is the year to inspect for coolant/oil leaks.
How much did the 2018 Mazda Mazda6 cost new?
Between $21,950 and $34,750 depending on trim. Those are base MSRPs for each trim's standard configuration; options, packages, and destination charges added to what original buyers actually paid.
Is the Mazda Mazda6 expensive to maintain?
Estimated repairs run roughly $450–500/year as mileage climbs.
Checking a listing right now?
The CarVitals extension runs this report automatically on any CarMax listing you open, with the listing's exact price, mileage, and trim filled in for you.
Add to Chrome · FreeNo account needed for the check. It runs on the car's details.
Estimates are based on public data: patterns, not guarantees. CarVitals is not affiliated with NHTSA, CarMax, AutoTrader, or Cars.com. Issue frequencies come from public NHTSA complaint data, which has no denominator, so they describe reporting patterns, not failure probabilities. Always have a used car inspected before buying. How we build these reports.