Used BMW Z4 Brake Caliper

Yes, all BMW Z4 variants have brake calipers on both axles — it is a standard component regardless of engine or trim level. The Z4 is a rear-wheel-drive roadster and has always been fitted with disc brakes all round, so every example will have a caliper at each corner. What does vary is the caliper size and specification, which is influenced primarily by engine size and output rather than trim level.

No — the E85 (2003–2009) and G29 (2018–present) are entirely different generations with separate platforms, brake architecture, and hub carriers, so calipers are not interchangeable between them. Always tell the breaker your exact registration so they can match the correct generation and spec to your car. Never assume a caliper from one generation will bolt onto another.

Engine size does affect brake caliper specification on the Z4, so a caliper from a smaller-engined sDrive18i or sDrive20i may differ in size or bolt pattern from the larger M40i. Always match the caliper to your specific engine variant, and confirm this with the breaker against your registration rather than assuming all Z4 calipers are interchangeable. The NS (nearside) and OS (offside) designation also matters — make sure you specify which corner you need.

The E89 ran from 2009 to 2016 and received a facelift during its production life; while the basic platform remained the same, there is a possibility that brake specifications were updated at some point mid-generation. Confirming whether a pre-facelift caliper crosses over to a post-facelift E89 is something you should check directly with the breaker against both registration numbers, as mid-generation brake upgrades are a known area of uncertainty. Give the breaker your full reg and ask them to verify the part numbers match before purchasing.

Yes — the Z4 M Roadster, which was available in the E85/E86 generation, was fitted with uprated brakes befitting its higher-powered S54 engine, and its calipers are not the same as those on the standard four-cylinder or six-cylinder Z4 models. If you have a Z4 M, make sure the breaker knows this specifically, as sourcing a standard Z4 caliper will not be a correct fit. Always confirm against your registration.

Trim level alone does not determine brake caliper fitment on the Z4 — what matters is the engine size and the generation of the car, not whether it is badged as Sport or M Sport. That said, some M Sport or sport-package cars may have been fitted with larger brakes optionally, so there is a small chance of variation; confirm with the breaker against your registration to be certain. Cosmetic differences like caliper colour are irrelevant to fitment and should not affect your decision.