Second Hand Fiat Stilo Differential

The Fiat Stilo ran from 2001 to 2007 as a single generation, with a facelift introduced in 2004, so your 2005 car sits in the post-facelift period while a 2002 unit is pre-facelift. The engine code is the most important factor here — if both cars share the same engine code, the differential may well interchange, but whether any ancillary or mounting changes occurred around the 2004 facelift boundary is something you should confirm with the breaker against your registration. Never assume fitment across a production refresh without that check.

No — the differential is matched to the drivetrain, and the 1.6 and 1.8 engines have different engine codes, meaning the gearing and internals of the differential are likely to differ. Always quote your exact engine code (found on your V5C or via a VIN check) to the breaker rather than just the badge size, as this is the single most reliable way to identify the correct unit. A breaker can then cross-reference their stock against your specific code.

Trim level — whether Active, Dynamic, or Sporting — does not affect differential fitment; what matters is the engine code, fuel type, and gearbox type. A differential from an Active and a Dynamic with the same engine code and transmission type should be mechanically equivalent, so don't let the trim badge put you off a part. Do bear in mind that higher-output variants may have carried a different final drive ratio, so confirm the engine code match with the breaker before buying.

Yes, fuel type matters because petrol and diesel versions of the Stilo used different engine codes and gearboxes, which affects the differential specification including gear ratios. Always tell the breaker whether your car is petrol or diesel and supply the exact engine code — this is far more useful than quoting the bhp figure or model year alone. Mixing fuel-type differentials risks incorrect ratios and potential drivetrain damage.

No, manual and automatic transmissions use fundamentally different differential assemblies, and the two are not interchangeable. You must source a differential from a Stilo with the same gearbox type as your car, and ideally the same engine code too. Let the breaker know your gearbox type and engine code together so they can match the unit correctly.

The most reliable approach is to supply the breaker with your exact engine code (from your V5C or a VIN check), your fuel type, your gearbox type (manual or automatic), and your registration number so they can verify compatibility against their stock. Year of manufacture is useful context but the engine code overrides it for mechanical fitment purposes. Whether ECU or other electronic components need pairing to your vehicle is something to confirm with the breaker against your registration, as this can vary and is not something that should be assumed.