How to service and repair the Brake Master Cylinder on Buick LeSabre?

The procedure to fix the Brake Master Cylinder starts with mounting it in a bench vise to access the primary Piston. Mount suitable fittings that match the required flare seat at the master cylinder ports to allow you to attach hoses. Link transparent hoses to these fittings and bring them into the master cylinder reservoir space. Put delco supreme 11 brake fluid gm part number 12377967 or its equivalent dot-3 fluid into the reservoir from a sanitation-sealed container until the hoses and fluid bottom reach the halfway mark. Using a round smooth tool press and release the Piston into the primary chamber twice as depth reaches about 25 mm (1 in). Repeat until no more air bubbles appear from the ports and the tool loses its natural return path. Keep pushing the Piston movement until the ports release fluid without showing air pockets inside the system. Take off the transparent hoses from the reservoir then put back the master cylinder reservoir cap and diaphragm before separating the hoses from their connections at the ports while keeping the master cylinder wrapped with a clean cloth to avoid spills.

OEM Buick LeSabre Brake Master Cylinder

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13 Brake Master Cylinders found

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Buick LeSabre Master Cylinder
Part Number: 25509416
$91.40 MSRP: $163.22
You Save: $71.82 (44%)
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaced by: 19176498
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1985 Buick LeSabre | Collector's Edition, Custom, Estate Wagon, Limited | 8 Cyl 5.7 L DIESEL
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Buick LeSabre Master Cylinder
Part Number: 18060068
$172.82 MSRP: $322.48
You Save: $149.66 (47%)
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Master Cylinder Assembly; Brake Master Cylinder
- Replaces: 18012756
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1992 Buick LeSabre | Base, Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 25632708
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Master Cylinder Assembly; Brake Master Cylinder
- Replaces: 25642820
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1995 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Overhaul Kit
Part Number: 18007935
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Master Cylinder Repair Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1990 Buick LeSabre | Collector's Edition, Custom, Estate Wagon, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS
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Buick LeSabre Master Cylinder Repair Kit
Part Number: 25509843
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Repair Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1985 Buick LeSabre | Collector's Edition, Custom, Estate Wagon, Limited | 8 Cyl 5.7 L DIESEL
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Buick LeSabre Master Cylinder
Part Number: 18047787
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18045192, 18040242
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2003 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 18022002
Product Specifications
- Other Name: Cylinder Kit, Brake Master; Overhaul Kit; Master Cylinder Repair Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2005 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 25535706
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1990 Buick LeSabre | Base, Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 25533694
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1989 Buick LeSabre | Base, Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 19209255
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18048572
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 19209230
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Master Cylinder Assembly; Brake Master Cylinder
- Replaces: 18046507, 18044394, 18029946
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 19209215
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18021862, 18029759, 18029856, 18020057
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-1999 Buick LeSabre | Custom, Limited | 6 Cyl 3.8 L GAS
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Buick LeSabre Master Cylinder
Part Number: 18013426
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1990 Buick LeSabre | Collector's Edition, Custom, Estate Wagon, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS

Buick LeSabre Brake Master Cylinder

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Buick LeSabre Brake Master Cylinder Parts Questions & Experts Answers

Master Cylinder
19209255
Q: How to service and repair the Brake Master Cylinder on Buick LeSabre?
A: The procedure to fix the Brake Master Cylinder starts with mounting it in a bench vise to access the primary Piston. Mount suitable fittings that match the required flare seat at the master cylinder ports to allow you to attach hoses. Link transparent hoses to these fittings and bring them into the master cylinder reservoir space. Put delco supreme 11 brake fluid gm part number 12377967 or its equivalent dot-3 fluid into the reservoir from a sanitation-sealed container until the hoses and fluid bottom reach the halfway mark. Using a round smooth tool press and release the Piston into the primary chamber twice as depth reaches about 25 mm (1 in). Repeat until no more air bubbles appear from the ports and the tool loses its natural return path. Keep pushing the Piston movement until the ports release fluid without showing air pockets inside the system. Take off the transparent hoses from the reservoir then put back the master cylinder reservoir cap and diaphragm before separating the hoses from their connections at the ports while keeping the master cylinder wrapped with a clean cloth to avoid spills.

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