Genuine AP brake master cylinder for the Mini Cooper S and 1275GT disc brake single line system. This has a larger tin reservoir than the master cylinder used on Mini drum brake models.

The Mini drum brake single line system master cylinder is also available , see GMC171OE.

Although very similar in appearance to the clutch master cylinder (AAU4969) 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		GMC227
1	Master Cylinder - Green tag, with servo	- '89 on	GMC90376
1	Conversion Kit - to fit a GMC227 master cylinder to all pre		BAU5654
	85 Mini with front rear split brake system. Original master cylinders are no longer available - GMC159 & GMC160	NLA	BAU5654LHD
2	Cap includes Switch for GMC227 / GMC90376		GRK6009
3	Repair kit	GMC167	GRK1002
3	Repair kit	GMC195	GRK1016
3	Repair kit	GMC159/160	GRK1019
3	Seal repair kit	GMC227	GRK1035
3	Seal repair kit	GMC90388	GRK1032
	Master Cylinder - Square reservoir for split diagonal		GMC167
4	Master cylinder gaskets (dual line)		31G840
4	Master cylinder gaskets (single line)		31G279
5	Nut - cylinder to bracket		GHF201
6	Spring Washer - cylinder to bracket		GFK1125
7	Limiter valve, bulkhead fitment	'78 on	FAM7821
8	Washer-spring-bolt		GFK1124
9	Bolt-valve to dash member		BT604161
	Master Cylinder - Standard, plastic tank type	- pre '76	GMC171
10	Master Cylinder - tin tank type	Cooper S/GT	GMC172OE
10	Master Cylinder - Standard, Tin tank type	- pre '76	GMC171OE
11	Repair kit (2 x ring seals)	GMC171/172	BAU1247
11	Repair kit (1 x ring, 1 x cup seal)	early GMC171/172	GRK1028
12	Brake & Clutch Master Cylinder Cap for GMC171/172		513123A
13	Reservoir extension - white plastic (tin tank only)		BHA4661
14	Clevis Pin - master cylinder to pedal		CLZ512

Size	XS	S	S	M	M	L
EU	32	34	36	38	40	42
UK	4	6	8	10	12	14
US	0	2	4	6	8	10
Bust	79.5cm / 31"	82cm / 32"	84.5cm / 33"	89.5cm / 35"	94.5cm / 37"	99.5cm / 39"
Waist	61.5cm / 24"	64cm / 25"	66.5cm / 26"	71.5cm / 28"	76.5cm / 30"	81.5cm / 32"
Hip	86.5cm / 34"	89cm / 35"	91.5cm / 36"	96.5cm / 38"	101.5cm / 40"	106.5cm / 42"

Size	XS	S	M	L	XL	XXL
UK/US	34	36	38	40	42	44
Neck	37cm / 14.5"	38cm /15"	39.5cm / 15.5"	41cm / 16"	42cm / 16.5"	43cm / 17"
Chest	86.5cm / 34"	91.5cm / 36"	96.5cm / 38"	101.5cm / 40"	106.5cm / 42"	111.5cm / 44"
Waist	71.5cm / 28"	76.5cm / 30"	81.5cm / 32"	86.5cm / 34"	91.5cm / 36"	96.5cm / 38"
Seat	90cm / 35.4"	95cm / 37.4"	100cm / 39.4"	105cm / 41.3"	110cm / 43.3"	115cm / 45.3"

OE Brake Master Cylinder - Mini Cooper S & 1275GT pre 1976

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