Cheap BMW M8 Brake Servo

The BMW M8 (G15 coupe, G14 convertible, G16 Gran Coupe, all from 2019 onwards) uses an electro-hydraulic or electrohydraulic brake booster system rather than a traditional vacuum-operated brake servo, because its high-performance engines do not generate sufficient intake vacuum to reliably power a conventional servo. What you are looking for is likely the integrated brake booster unit or iBooster assembly, not a traditional brake servo. When searching or requesting quotes from a breaker, ask specifically for the 'brake booster' or 'electric brake booster' rather than 'brake servo' to make sure you get the correct part.

Because the M8 does not use a conventional vacuum brake servo at all, this question does not directly apply - there is no traditional servo to swap between a standard 8 Series and an M8. The M8's electro-hydraulic brake booster is a distinct unit, and given the M8's significantly uprated braking hardware compared to the standard 840i or 840d, you should always confirm the exact part number with a breaker quoting against your specific registration.

All three M8 body styles - the G15 coupe, G14 convertible, and G16 Gran Coupe - share the same basic platform and drivetrain, so the brake booster unit is not expected to differ by body style. However, because this is an electronically integrated component with software pairing considerations, confirm compatibility against your exact registration with the breaker before purchasing.

The M8 Competition shares the same S63 4.4-litre twin-turbocharged V8 engine and the same electro-hydraulic braking system architecture as the standard M8, so the Competition badge alone is not expected to change the brake booster unit itself. That said, mid-cycle or specification-level differences cannot be ruled out without checking part numbers, so confirm against your registration with the breaker.

All M8 models produced from the G-generation launch in 2019 through to the current range sit within the same generation with no major facelift boundary known to have altered the braking system architecture during this period. In principle, units from earlier 2019-2020 cars may well be compatible with a 2021 car, but because the electro-hydraulic booster can be software-linked to the vehicle's ABS and stability control modules, fitment and coding compatibility should be confirmed with the breaker against both registrations before you buy.

It is highly unlikely - the G-generation M8 was engineered from the outset with an electro-hydraulic braking system rather than a vacuum servo, and no variant of the G14, G15, or G16 M8 is known to have used a traditional servo. If a listing on Findapart or elsewhere describes a 'brake servo' for an M8, ask the breaker to confirm the exact part and whether it is in fact the electric booster unit, as terminology is sometimes used loosely in the trade.