Second Hand Mazda 6 Differential

The Mazda 6 third generation (GJ) runs from 2012 onwards, so both years sit within the same generation, which is a promising starting point. However, fitment of the differential depends heavily on engine code and gearbox type — a diesel unit will not swap with a petrol one, and an automatic differential differs from a manual. Give the breaker your engine code from your V5 and confirm whether your car is front-wheel drive, as the Mazda 6 GJ is predominantly FWD and most UK models do not carry a rear differential in the traditional sense.

Yes — the Mazda 6 ran as the GG/GY first generation from 2002 to 2007, followed by the GH second generation from 2007 to 2012, so there is a clear platform boundary between those two. Mechanical components including differential housings and ratios changed across that boundary, meaning a GG-era part is very unlikely to suit a GH car. Always confirm compatibility with the breaker against your specific registration and engine code rather than assuming year alone is enough.

The third-generation Mazda 6 (GJ) received a facelift in 2014, and while the core platform carried over, whether the differential and associated mounting points changed mid-generation is something you should confirm with the breaker against your registration. The engine code is the most reliable guide here — if both cars share the same engine code and gearbox type, fitment is more likely, but ancillary changes around a facelift can catch buyers out. Supply your full engine code and VIN details to the breaker so they can cross-reference stock accurately.

Trim level — whether your car is an SE, SE-L, Sport Nav, or GT Sport — does not affect differential fitment on the Mazda 6; these trims share the same mechanical underpinnings and differ in equipment, interior finish, and comfort features rather than drivetrain components. What actually matters is your engine code, fuel type (petrol or diesel), and gearbox type (manual or automatic), so focus on supplying those details to the breaker. You may find minor cosmetic differences between donor and recipient cars when collecting ancillary brackets or covers, but the core differential unit is determined by the drivetrain, not the badge on the boot.

The single most useful detail is your engine code, which you can find on your V5C or via a VIN check — this tells the breaker far more than the year or trim name alone. You should also confirm your gearbox type (manual or automatic) and fuel type, as these directly affect which differential ratio and housing is fitted. If your car has any factory options relating to the drivetrain, mention those too, and ask the breaker to check the part against your full registration to account for any mid-run production changes.

No — petrol and diesel variants of the Mazda 6 use different differentials suited to the torque characteristics and gearing of their respective engines, so the two are not interchangeable even within the same model year. Engine code is the definitive guide, and a breaker will use this to identify the correct unit from their stock. Always supply your exact engine code when requesting a quote to avoid being sent an incompatible part.