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No two ignition switchs are quite the same across different vehicles, so getting the specifics right matters when you buy used, second hand or a replacement. Answer a few quick questions below and breakers will only quote if they have the exact matching part in stock:
Yes, the Alfa Romeo 147 uses a conventional barrel-type ignition switch into which you insert and turn the key to start the engine. All variants of the 147, across all engine options and trim levels, were fitted with this type of ignition switch throughout the model's production run from 2001 to 2010. This makes it a straightforward part to source from a breaker.
The Alfa Romeo 147 received a facelift for the 2005 model year, splitting the range into the pre-facelift (2001–2004) and facelift (2005–2010) generations. The ignition switch and surrounding barrel assembly may differ between these two generations, so crossing that boundary is not guaranteed. Confirm with the breaker that the part number or physical fitment matches your specific registration before purchasing.
Trim level does not affect ignition switch fitment on the Alfa Romeo 147 — whether your car is a base, Lusso, or even the high-performance GTA, the ignition switch itself is the same type. The GTA uses the same ignition system layout as other 147 variants, so there is no need to seek a trim-specific part. Just make sure the part is from the correct generation (pre-facelift or facelift) to match your car.
Engine variant does not affect ignition switch fitment on the 147, as the ignition switch is part of the steering column assembly rather than the engine-specific wiring. A switch from a 1.6 petrol car should be the same unit as one from a 1.9 JTD or 2.0 Twin Spark, provided both are from the same generation. Confirm the part matches your year and generation with the breaker to be safe.
A 2003 147 is a pre-facelift car, while a 2006 example sits in the facelift generation, and there is a real risk the ignition switch and barrel assembly differ between these two periods. You should treat this as a cross-generation swap and route the question to the breaker, asking them to check the part against your registration or compare part numbers directly. Buying from a pre-facelift donor car (2001–2004) is the safer starting point for a 2003 vehicle.
On the Alfa Romeo 147 the ignition switch (the electrical contact unit at the back of the barrel) can sometimes be replaced separately from the lock barrel itself, which is useful if your key and barrel are undamaged but the electrical switch has failed. However, if the barrel is worn or the car has been stolen or tampered with, breakers often supply the switch and barrel together as a unit, sometimes with a key. Discuss with the breaker what exactly is included in the part they are selling, as this affects whether you will need to rekey or recode anything.