Genuine OEM 21526774078 - Clutch Master Cylinder

Product Overview

This Genuine OEM clutch master cylinder (MPN 21526774078) is the factory-specification replacement for MINI Cooper, Clubman, Countryman, Coupe, Roadster, and Paceman models from 2008 to 2016. The master cylinder is the hydraulic heart of your clutch system, converting pedal pressure into fluid force to engage and disengage the clutch. This part fits R55, R56, R57, R58, R59, R60, and R61 chassis vehicles equipped with 1.6 L4 and 2.0 L4 gasoline engines. As a Genuine OEM part, it meets MINI factory specifications and carries the confidence of dealership-grade quality.

Symptoms of a Failing Clutch Master Cylinder

• Soft or spongy clutch pedal that lacks firm resistance
• Clutch pedal sinks to the floor without engagement
• Difficulty shifting into gear or grinding when shifting
• Fluid leaking from the master cylinder body or connection points
• Clutch does not fully disengage, causing drag or difficulty disengaging
• Pedal requires excessive pressure or multiple pumps to engage properly

Cross Reference Numbers

This Genuine OEM 21526774078 is equivalent to or replaces the following part numbers: 21-52-6-774-078, 21526774078.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• MINI Cooper Hatchback 1.6 L4 Gas (R56): 2008–2013
• MINI Cooper Hatchback 1.6 L4 Gas (F56): 2014–2015
• MINI Cooper Hatchback 2.0 L4 Gas (F56): 2014
• MINI Cooper S Hatchback 1.6 L4 Gas (R56): 2009–2013
• MINI Cooper S Hatchback 1.6 L4 Gas (F56): 2014–2015
• MINI Cooper JCW Hatchback 1.6 L4 Gas (R56): 2009–2013
• MINI Cooper JCW Hatchback 1.6 L4 Gas (F56): 2014–2015
• MINI Clubman Cooper 1.6 L4 Gas (R55): 2008–2010
• MINI Clubman Cooper 1.6 L4 Gas (R55): 2011–2013
• MINI Clubman Cooper S 1.6 L4 Gas (R55): 2008–2010
• MINI Clubman Cooper S 1.6 L4 Gas (R55): 2011–2013
• MINI Clubman Cooper S 1.6 L4 Gas (F54): 2014–2015
• MINI Clubman JCW 1.6 L4 Gas (R55): 2011–2013
• MINI Clubman JCW 1.6 L4 Gas (F54): 2014–2015
• MINI Coupe Cooper 1.6 L4 Gas (R58): 2012–2015
• MINI Coupe Cooper S 1.6 L4 Gas (R58): 2012–2015
• MINI Coupe JCW 1.6 L4 Gas (R58): 2012–2015
• MINI Roadster Cooper 1.6 L4 Gas (R59): 2012–2015
• MINI Roadster Cooper S 1.6 L4 Gas (R59): 2012–2015
• MINI Roadster JCW 1.6 L4 Gas (R59): 2012–2015
• MINI Convertible Cooper 1.6 L4 Gas (R57): 2009–2010
• MINI Convertible Cooper S 1.6 L4 Gas (R57): 2009–2010
• MINI Countryman Cooper 1.6 L4 Gas (R60): 2011–2012
• MINI Countryman Cooper S 1.6 L4 Gas (R60): 2011–2016
• MINI Countryman Cooper S ALL4 1.6 L4 Gas (R60): 2011–2016
• MINI Countryman JCW ALL4 1.6 L4 Gas (R60): 2013–2016
• MINI Paceman Cooper 1.6 L4 Gas (R61): 2013–2016
• MINI Paceman Cooper S 1.6 L4 Gas (R61): 2013–2016
• MINI Paceman Cooper S ALL4 1.6 L4 Gas (R61): 2013–2016
• MINI Paceman JCW ALL4 1.6 L4 Gas (R61): 2013–2016

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete clutch system service, many owners replace the following at the same time:

• Clutch slave cylinder (hydraulic actuator at the transmission)
• Clutch fluid (DOT 4 brake fluid; flush the entire system)
• Clutch disc and pressure plate (wear item; often replaced during master cylinder service)
• Clutch hose and fittings (inspect for leaks and deterioration)

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Frequently Asked Questions

How do I know if my MINI Cooper or Countryman needs a new clutch master cylinder?

The most reliable indicator is a soft or spongy clutch pedal that gradually loses firmness, or a pedal that sinks slowly to the floor even with your foot resting on it. You may also notice difficulty engaging the clutch or shifting smoothly into gear. Internal seal wear in the master cylinder allows fluid to bypass internally, reducing pressure. Inspect the master cylinder body and brake line connections for external fluid leaks; any visible seepage is a sign of imminent failure. If the pedal feels normal and firm, the master cylinder is likely still serviceable.

Is this a Genuine MINI part, and what warranty does it carry?

Yes, this is a Genuine OEM clutch master cylinder manufactured to MINI factory specifications. Genuine OEM parts typically carry a 12-month or 12,000-mile warranty from the date of purchase when installed by a MINI dealership or certified technician. When purchased through eEuroparts.com, verify your specific warranty terms at checkout. Genuine parts ensure exact fitment and performance matching your vehicle's design, and many technicians recommend them for critical hydraulic components like the master cylinder.

Can I replace just the master cylinder, or do I need to replace the slave cylinder and clutch disc at the same time?

You can replace the master cylinder independently if it is the only failed component. However, if your clutch system has high mileage or shows other symptoms (soft pedal, slipping, drag), it is wise to inspect the slave cylinder and clutch disc. The slave cylinder operates in tandem with the master and may wear similarly. The clutch disc is a wear item and often fails around the same time as the master cylinder. Flushing the entire clutch fluid system during master cylinder replacement is always recommended to remove contamination and air.

What tools and skills do I need to install this master cylinder on my MINI?

Installation requires basic hand tools (socket set, wrenches, screwdrivers), a brake fluid catch pan, and a clear workspace. You will need to remove the driver-side interior trim to access the pedal box, disconnect the brake line (or clutch line, depending on your model year), unbolt the old cylinder, and install the new one. Bleeding air from the system afterward is essential. If you are not comfortable working with hydraulic systems or do not have proper bleeding tools, professional installation is recommended. A qualified technician can complete the job in 1 to 2 hours.

Do I need to bleed the clutch system after installing a new master cylinder?

Yes, bleeding is mandatory after any master cylinder replacement. Air trapped in the hydraulic lines will cause a soft, unresponsive pedal and prevent proper clutch engagement. Bleeding removes air pockets and restores full hydraulic pressure. Follow the procedure outlined in your MINI service manual or consult a professional technician for the correct bleeding sequence and fluid specification. Use only DOT 4 brake fluid (clutch systems share fluid with the brake system on many MINI models).

How long does a clutch master cylinder typically last on a MINI Cooper or Countryman?

A properly maintained clutch master cylinder can last 80,000 to 150,000 miles or more, depending on driving habits and how frequently you engage the clutch. Heavy city driving with frequent gear changes or aggressive manual driving may accelerate wear. Gradual seal degradation is the primary failure mode; once seals begin to fail, the cylinder will not hold pressure and must be replaced. There is no scheduled service interval for the master cylinder itself, but regular fluid checks and prompt attention to pedal feel will help you catch problems early.

Order Genuine OEM 21526774078 today to restore full clutch engagement and pedal feel to your MINI Cooper, Clubman, Countryman, Coupe, Roadster, or Paceman. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your MINI.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.