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SKU
GMC171

GMC171 AP Master Cylinder with Single Line Plastic Reservoir for Classic Mini

Special Price £83.59 £69.66 Regular Price £89.68
In stock
SKU
GMC171
Ensure optimal braking with the GMC171 AP Master Cylinder, featuring a single line plastic reservoir for Classic Mini, compatible with DOT4 or DOT5.1 brake fluids.

Details

The GMC171 Brake Master Cylinder, a genuine AP Master cylinder with a plastic tank, is a critical component for the hydraulic system of your Classic Mini.

Recognised as the heart of the system, it plays a vital role in ensuring efficient and safe braking. A master cylinder that allows the pedal to slowly reach the floor or shows fluid leakage is a clear indication of wear and needs replacement. While brake and clutch master cylinders may appear similar, later models like this one come with plastic reservoirs, and it's important to note that they are not interchangeable due to internal differences.

This cylinder has a 0.70" bore size, and for those seeking an all-metal version, the original metal master cylinder is available as GMC171OE, or GMC172 for a larger capacity type suitable for Cooper S models.

The large mounting foot distinguishes this brake master from the clutch master, which has a smaller foot.

It's essential to use only DOT4 or DOT5.1 brake fluids with this cylinder, as it is not designed for alternative fluids like Castrol SRF for racing or any mineral fluid. Choose the GMC171 for reliable, consistent brake performance in your Classic Mini.

Genuine AP brake master cylinder for the pre '76 Mini drum brake single line system. This modern version is fitted with a plastic reservoir so the fluid level can be seen. The original tin reservoir master cylinder is still available as GMC171OE.

Mini Cooper S and 1275GT models with front disc brakes used a master cylinder with a larger reservoir, see GMC172OE.

Although very similar in appearance to the clutch master cylinder (STC100330) the brake cylinder can be identified by its larger mounting flange.

If you are fitting a new brake master cylinder to your Mini you may also need,

  • 31G279 - Single line master cylinder gasket
  • 14A6733 - Master cylinder mounting plate
  • MCR11.24.04.05 - Master cylinder mounting plate gasket
  • CLZ512 - Clevis pin
  • CAS1704 - Castrol React performance brake fluid

Buy top quality Classic Mini brake spares and parts from Mini Sport, the worlds premier online Mini store!

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No.
Description
Notes
Part No.
1
Yellow tag, '85 on (front/rear split) pre servo
 
1
Master Cylinder - Green tag, with servo
- '89 on
1
Conversion Kit - to fit a GMC227 master cylinder to all pre
 
 
85 Mini with front rear split brake system. Original master cylinders are no longer available - GMC159 & GMC160
NLA
2
Cap includes Switch for GMC227 / GMC90376
 
3
Repair kit
GMC167
3
Repair kit
GMC195
3
Repair kit
GMC159/160
3
Seal repair kit
GMC227
3
Seal repair kit
GMC90388
 
Master Cylinder - Square reservoir for split diagonal
 
4
Master cylinder gaskets (dual line)
 
4
Master cylinder gaskets (single line)
 
5
Nut - cylinder to bracket
 
6
Spring Washer - cylinder to bracket
 
7
Limiter valve, bulkhead fitment
'78 on
8
Washer-spring-bolt
 
9
Bolt-valve to dash member
 
 
Master Cylinder - Standard, plastic tank type
- pre '76
10
Master Cylinder - tin tank type
Cooper S/GT
10
Master Cylinder - Standard, Tin tank type
- pre '76
11
Repair kit (2 x ring seals)
GMC171/172
11
Repair kit (1 x ring, 1 x cup seal)
early GMC171/172
12
Brake & Clutch Master Cylinder Cap for GMC171/172
 
13
Reservoir extension - white plastic (tin tank only)
 
14
Clevis Pin - master cylinder to pedal
 
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More Information

More Information
SKU GMC171
Manufacturer OE Spec
Cross Reference Product Codes GMC171
Frequently Bought Together