Second Hand Peugeot 306 Brake Servo

The 306 ran from 1993 to 2002, with a significant facelift in 1997 that updated the front end and some mechanical components, so there is a generation boundary to be aware of here. Pre-facelift (1993–1997) and post-facelift (1997–2002) servos may differ, and whether a unit crosses that boundary safely is something you should confirm with the breaker against your exact registration. Engine size also matters, as larger-engined 306s tended to run bigger braking systems than smaller ones, so make sure the breaker matches engine size as well as model year.

Trim level itself does not affect which brake servo a 306 needs, but engine size absolutely does — the Rallye and GTi-6 use larger, more powerful engines that typically have a correspondingly uprated braking system compared to the smaller-engined XR or XL. So while the trim name alone is not the deciding factor, the difference in engine capacity between these variants means the servos are unlikely to be a straight swap. Always give the breaker your full registration so they can match on engine size rather than trim name alone.

Yes, the 306 is fitted with a vacuum brake servo across its model range, including both petrol and diesel variants. The servo assists the brake pedal effort and is mounted in the engine bay between the brake master cylinder and the bulkhead. If yours has failed, a used unit from a 306 of matching year and engine size is the right place to start.

Not necessarily — diesel and petrol engines generate vacuum differently, and the servo sizing can vary with the braking demands of the different engine outputs across the 306 range. A 1.9 diesel unit may not match a 1.4 petrol servo, for example, so engine size and fuel type are both details the breaker will need. Give the breaker your registration and engine code to get the most accurate match.

This spans the 1997 facelift, which is a known engineering boundary on the 306, so fitment across this divide is not guaranteed even if the engines are the same size. The facelift brought updates to a number of components, and whether the servo changed at that point is something you should confirm directly with the breaker against both registrations. Do not assume a pre-1997 unit will bolt straight onto a post-1997 car without that check.

Yes, engine size is one of the most important factors — larger or more powerful engines in the 306 range generally have bigger braking systems to match, including the servo. A 2.0 litre unit is not a reliable match for a 1.4 litre application, so always specify your engine size when requesting a quote from a breaker. Matching both engine size and model year gives you the best chance of getting a compatible part.