Quick Facts — Mazda 6

Est. On UK Roads
120,000+
Years Made
2002–2023
Common Engines
2.0 Skyactiv-G, 2.5 Skyactiv-G, 2.0 Skyactiv-D, 2.2 Skyactiv-D

6 Most Common Mazda 6 Problems

These are the faults most frequently seen on the Mazda 6 by UK garages — ranked by how commonly they occur and what they cost to fix.

1
DPF Blockage (Skyactiv-D Diesel)
High Priority
Diesel Mazda 6s — especially Tourers used as family cars — develop DPF blockages on short runs. Very common at UK garages on cars primarily used for short journeys.
💷 Typical repair cost: £100–£1,500
2
Timing Chain Wear (2.0/2.5 MK2 Pre-Skyactiv)
High Priority
Pre-Skyactiv 2.0 and 2.5 petrol engines in older MK2 Mazda 6s can develop timing chain noise on higher mileage examples. A cold-start rattle indicates tensioner wear.
💷 Typical repair cost: £500–£1,800
3
EGR Valve Carbon Buildup (Skyactiv-D)
Watch
High-mileage Skyactiv-D Mazda 6s develop EGR carbon deposits causing rough running and EML.
💷 Typical repair cost: £150–£500
4
Rear Brake Caliper Seizure
Watch
Rear brake caliper seizure is reported on older Mazda 6 models — particularly in high-salt areas. Causes uneven brake wear, pulling and judder.
💷 Typical repair cost: £150–£400 per side
5
Sunroof Drain Blockage (Panoramic Roof)
Watch
Panoramic sunroof drain blockages cause water ingress into the cabin on MK3 Mazda 6 models.
💷 Typical repair cost: £50–£300
6
Windscreen Wiper Motor Failure
Low Priority
Wiper motor failures are occasionally seen on older MK2 Mazda 6 models.
💷 Typical repair cost: £80–£250

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Mazda 6 — MOT Tips

DPF warning is an automatic fail on diesel models. Check the 2.0/2.5 petrol for cold-start timing chain rattle on older MK2 cars. Inspect rear brake calipers for seizure — seized calipers are a common MOT fail. Check all wiper functions — both are MOT items.

Engine management light on before your MOT? It's an automatic fail. Run a Find Your Problem Now → to get the likely cause and repair cost before booking the test.

Mazda 6 Tyres

Most Mazda 6 models run 205/60 R16 or 215/55 R17 or 225/45 R18 or 225/40 R19 depending on trim level and year. Always check the placard inside the driver's door for the exact size for your vehicle.

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Frequently Asked Questions

What is the most common problem with the Mazda 6?

The most frequently reported issue on the Mazda 6 is DPF Blockage (Skyactiv-D Diesel). Diesel Mazda 6s — especially Tourers used as family cars — develop DPF blockages on short runs. Very common at UK garages on cars primarily used for short journeys.

How many Mazda 6s are on UK roads?

There are an estimated 120,000+ Mazda 6s currently on UK roads.

What tyres does the Mazda 6 use?

Most Mazda 6 models run 205/60 R16 or 215/55 R17 or 225/45 R18 or 225/40 R19 depending on trim level and year. Always check the placard inside the driver's door for the exact size for your vehicle.

Will a warning light fail my Mazda 6's MOT?

DPF warning is an automatic fail on diesel models. Check the 2.0/2.5 petrol for cold-start timing chain rattle on older MK2 cars. Inspect rear brake calipers for seizure — seized calipers are a common MOT fail. Check all wiper functions — both are MOT items.

Similar Issues on Other Models

Renault Megane — also commonly develops DPF blockage SEAT Leon — DPF blockage shows up here too

Summary

The Mazda 6 is an outstanding used large family car — better built than many rivals at its used price point. The Skyactiv-G petrol with a manual gearbox is the most reliable combination. Avoid the diesel for short-journey family use. The Tourer estate is particularly good value on the used market.

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Mazda 3 → Mazda CX-5 → Mazda CX-30 → Mazda CX-3 →