Used Peugeot 307 Brake Master Cylinder

The Peugeot 307 ran from 2001 to 2008 with a facelift in 2005, and the brake master cylinder can differ across that boundary depending on engine size and braking system spec. Parts from pre-facelift (2001–2005) and post-facelift (2005–2008) cars may not interchange directly, so always confirm with the breaker against your exact registration rather than assuming year-to-year compatibility. Engine size matters here too, as larger-engined 307s were sometimes fitted with uprated braking systems.

Engine size can influence the brake master cylinder specification on the 307, as larger or more powerful engines sometimes carried a different bore size cylinder to suit uprated brakes. A 1.4 and 1.6 unit may look similar but not be a direct swap, so give the breaker your full registration so they can match the correct spec rather than going by engine size alone. Never assume two cylinders are interchangeable based on appearance.

Trim level — whether your 307 is an S, LX, XT, or SE — does not affect which brake master cylinder you need, as the cylinder is determined by engine size and braking system spec rather than interior or cosmetic specification. You may find parts pulled from different trims on a breaker's shelf and they can be perfectly suitable, but always verify against your registration to confirm the underlying brake spec matches. Trim differences you'll notice on a used part are purely cosmetic and irrelevant to fitment.

The 307 SW estate was offered alongside the hatchback and, where the engine and braking system specification match, the brake master cylinder may well be the same unit. However, it is worth confirming with the breaker against both registrations, as vehicle weight differences between body styles can sometimes influence braking system specification. Do not assume a direct swap without that check.

The 307 facelift arrived in 2005, so a 2004 car is pre-facelift and a 2006 car is post-facelift, which means you are crossing a known model boundary. The brake master cylinder may or may not interchange across this boundary depending on whether the braking system specification changed at the same time as the styling updates. Confirm this directly with the breaker using both registrations before purchasing, as this is exactly the kind of mid-generation change that is difficult to verify without checking the specific parts.

Yes, every Peugeot 307 variant has a brake master cylinder — it is a fundamental hydraulic component that converts pedal pressure into braking force and is present on all conventional braked vehicles regardless of drivetrain or engine type. There is no 307 variant for which this part would be absent, so you are right to be looking for one. The key variables for finding the correct used unit are your engine size and model year, not trim or colour.