Used Alfa Romeo 155 Throttle Body

Yes, petrol-engined variants of the Alfa Romeo 155 use a throttle body as part of their fuel injection system. The 155 was sold in the UK from 1992 to 1998 with a range of four-cylinder and V6 petrol engines, all of which are fuel-injected and fitted with a throttle body. Diesel variants use a different fuelling arrangement and do not have a conventional throttle body in the same sense, so confirm with the breaker if you have a diesel.

The 155 ran as a single generation from 1992 to 1998 with a facelift arriving in 1995, and while the engine family remained broadly similar across this period, ancillary mounting and component specifications can change mid-production even within the same engine code. Your best starting point is to identify your exact engine code from your V5 or a VIN check, then confirm with the breaker whether the unit they have matches that code and suits your model year. Never assume a pre-facelift part is a direct swap onto a post-1995 car without that confirmation.

The engine code matters far more than the year for a mechanical part like a throttle body, because Alfa Romeo fitted several different engines to the 155 across its life — including 1.6, 1.8, 2.0 Twin Spark, 2.5 V6, and the Q4 turbocharged variant — and each has its own throttle body specification. Two 155s from the same year could take completely different parts if they have different engines under the bonnet. Find your engine code on your V5 registration document or via a VIN check and supply it to the breaker — it is the single most useful detail you can give them.

For the throttle body itself, gearbox type is unlikely to be a primary fitment factor since the part sits on the engine rather than the transmission, but on some applications the engine management calibration or throttle position sensor specification can differ between manual and automatic variants. Supply your engine code and gearbox type to the breaker so they can confirm the unit they have came from a matching setup. Do not assume gearbox type is irrelevant without checking.

The 155 Q4 uses a turbocharged version of the 2.0-litre engine, which is a fundamentally different setup to the naturally aspirated 2.0 found in standard models, and the induction and throttle arrangements differ accordingly. You should not assume a throttle body from a non-turbo 155 will interchange with a Q4 unit. Give your exact engine code to the breaker and make clear you have the turbocharged Q4 variant so they can source the correct part.

Trim level does not affect throttle body fitment — the part follows the engine, not the badge or equipment level. Whether your 155 is a base, Veloce, or any other trim designation, what matters is the engine code fitted to your particular car. Different trims could be ordered with different engines, so the engine code is still what you need to confirm; just do not worry about trim level as a fitment factor in itself.