Second Hand Alfa Romeo 155 Air Flow Meter

Only some 155 engines use an air flow meter — specifically the fuel-injected petrol engines that rely on a mass airflow sensor as part of their engine management system, such as the 2.0 Twin Spark and certain V6 variants. The diesel and some earlier carburettor-fed petrol variants do not use one. Check your engine code on your V5 or via a VIN check before searching, as ordering the wrong type is a common mistake.

The Alfa Romeo 155 ran from 1992 to 1997, with a facelift introduced in 1995, and the engine code is the most important factor here — if both cars share the same engine code, the air flow meter is more likely to be compatible. However, ancillary and mounting changes can occur mid-production even within the same engine family, so you should confirm compatibility with the breaker against your exact registration rather than assume year-to-year interchange. Always quote your engine code when requesting a quote.

No — trim level does not affect air flow meter fitment on the 155; what matters is the engine code, fuel type, and whether the engine management system uses a mass airflow sensor at all. The 155 was available in variants including base, Super, and the Q4 all-wheel-drive version, but none of these trim differences change the air flow meter specification — the engine underneath is what dictates the part. Tell the breaker your engine code and fuel type, not your trim badge.

The 1995 facelift is a real boundary point for the 155, and while many mechanical components carried over, whether the air flow meter crosses that boundary depends on whether the engine code and management system remained unchanged on your specific variant. Name the boundary to your breaker and confirm against your registration, as there can be mid-production sensor or wiring differences that aren't always documented publicly. Don't assume pre- and post-facelift units are a straight swap without checking.

The Q4 used a turbocharged 2.0-litre engine, which is a different unit from the naturally aspirated 2.0 Twin Spark found in standard petrol variants, so the two are unlikely to share the same air flow meter. Engine code is the definitive guide here — the Q4's turbocharged setup has different fuelling and management requirements. Always quote the Q4's specific engine code to the breaker to ensure you're quoted the correct part.

Potentially yes, if the engine code is shared with another Alfa Romeo of the same era — some Alfa engines were used across the 155, 164, and GTV/Spider platforms, and where the engine code matches the air flow meter may be identical. However, ECU pairing and any immobiliser coding implications are things you must confirm with the breaker against your registration, as these factors can affect whether a used unit works correctly in your car. Quote your engine code and let the breaker advise on cross-model compatibility.