Is the Vauxhall Frontera rear differential from a petrol model compatible with diesel model?

While Vauxhall Frontera rear differentials might appear similar, compatibility between petrol and diesel models isn't guaranteed. The differences in engine power and torque output can lead to variations in the differential's gearing and internal components designed to handle the different stresses.

Therefore, it's not safe to assume compatibility. You need to verify the part numbers for the differentials to be certain. Using a parts catalogue specific to your Frontera's year and model (petrol and diesel versions) is the best way to determine compatibility. Even then, slight variations in the housing could create fitment issues. Simply matching the year and model isn't enough.