BMW i5 Brake Master Cylinder Replacement Parts

The BMW i5 is a fully electric vehicle — it has no hydraulic brake master cylinder in the conventional sense. Electric vehicles use brake-by-wire or electro-hydraulic brake systems where the traditional master cylinder is replaced by an integrated brake unit (sometimes called an iBooster or electro-hydraulic control unit). If you're looking for the component that provides braking pressure control on the i5, you should be asking breakers for the integrated brake unit or brake booster assembly specific to the i5, not a brake master cylinder. Confirm the exact part name and number with the breaker against your registration to make sure you get the right component.

It is almost certainly a misnomer — the i5 is a pure electric car and does not use a traditional hydraulic brake master cylinder. The braking system on the i5 uses an integrated electro-hydraulic brake unit that combines the functions of a conventional master cylinder and booster into a single assembly. If a supplier or breaker is listing it as a 'brake master cylinder,' they may simply be using a loose description for this integrated unit, so always cross-reference the part number against your registration before purchasing. Ask the breaker specifically for the integrated brake unit or brake control unit to be sure you're getting the correct part.

No — a conventional brake master cylinder from a combustion-engined 5 Series (G30 or earlier) is not compatible with the i5, which uses a fundamentally different electro-hydraulic brake system without a traditional master cylinder. The i5 (G60, launched 2023) shares its platform with the G60 5 Series but the electric drivetrain means the brake architecture is entirely different from petrol or diesel variants. If you need the brake control unit for your i5, source it specifically from an i5 donor vehicle and confirm compatibility with the breaker against your registration.

Yes, this is likely to matter — the M60 xDrive is a significantly more powerful and heavier variant than the eDrive40, and brake system components on higher-output electric vehicles are often uprated to suit. While trim level and colour make no difference to fitment, the drivetrain variant and output rating can affect the specification of the integrated brake unit. Confirm the exact part number against your registration with the breaker, as the eDrive40 and M60 xDrive components may not be interchangeable.

The i5 launched in the UK in 2023 (G60 generation) and is still in its first generation at the time of writing, so there is no facelift or mid-cycle update to account for yet. That said, mid-generation running changes to brake system components are always possible and cannot be ruled out — confirm the part against your specific registration with the breaker rather than relying on model year alone. Because the i5 uses an integrated electro-hydraulic brake unit rather than a conventional master cylinder, getting the right part number is especially important.

Ask the breaker for the integrated brake unit or electro-hydraulic brake booster assembly — this is the component that performs the function a master cylinder handles on a conventional car. Quote your full registration number so the breaker can identify the correct part, as specifications may differ between i5 variants such as the eDrive40 and M60 xDrive. A reputable breaker dismantling i5 vehicles will be familiar with the correct terminology, and cross-referencing BMW part numbers is the most reliable way to confirm you're getting the right unit.