How to replace the brake master cylinder on Buick LaCrosse?

Switch off engine power to operate the Brake Pedal multiple times until it feels solid while using up the power vacuum Brake Booster's vacuum pressure reserve. Take off the intake manifold cover only when needed. Securely place a suitable removal tool in the master cylinder reservoir to drain and dispose the brake fluid. Putting the radiator surge tank nearby you can safely remove it without touching coolant or disconnecting the hoses. Unplug the electrical connection for the brake fluid level indicator switch and detach the primary brake pipe master cylinder completion while capping it to maintain the brake fluid system. Afterwards disconnect and cap the master cylinder secondary brake pipe fitting. Lift out the master cylinder while removing its nuts then install the new master cylinder including the o-ring seal. During new master cylinder installation perform the bench bleed procedure to put the o-ring seal perfectly in its groove without deformation. Place the master cylinder with its o-ring seal inside the installation area before tightening the master cylinder nuts to 50 nm (37 lb ft). Install the master cylinder primary brake pipe fitting then bolt it with 18 nm torque followed by fitting the secondary brake pipe using the same torque setting. Plug back in the brake fluid level indicator switch wires before placing the radiator surge tank back. End the hydraulic brake process before reinstalling the intake manifold cover.

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

To repair the Brake Master Cylinder start by locking the mounting flange in a bench vise to reach the base of the main Piston. Install suitable connectors for hose attachment at the master cylinder outlets by removing both cap and diaphragm. Connect clear hoses to these fittings and feed them into the master cylinder reservoir. Put delco supreme 11 brake fluid (GM P/N 12377967 or equivalent DOT-3) into the reservoir until it reaches half its capacity while keeping both hose ends fully underwater from a sealed container. Depress and release the primary Piston 1 inch with a smooth tool several times to check fluid flow from the ports. Your force to push down the primary Piston will grow since the Piston travels a shorter distance when air leaves both pistons. Repeat the method until the fluid streams out naturally without air bubbles appearing. To finish the calibration insert the transparent hoses into the reservoir then put back the reservoir cap and diaphragm. Disconnect the fittings with the hoses from both ports before removing the master cylinder from the vise while keeping it covered by a clean shop cloth to avoid leaks.

OEM Buick Brake Master Cylinder

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69 Brake Master Cylinders found

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Buick ABS Control Unit Part Number: 42862813
$672.79 MSRP: $1108.05
You Save: $435.26 (40%)
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder
- Replaced by: 42907265
- Replaces: 42826127
Fits the following Buick Models:
- Encore GX | 2024-2025 | Avenir, Preferred, Sport Touring | 3 Cyl 1.2 L FLEX, 3 Cyl 1.2 L GAS, 3 Cyl 1.3 L GAS
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Buick Master Cylinder Part Number: 84744483
$91.59 MSRP: $292.35
You Save: $200.76 (69%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder
- Replaces: 22823315, 25805646, 25894721, 84279343, 84158419
Fits the following Buick Models:
- Enclave | 2008-2017 | Base, Convenience, CX, CXL, Leather, Premium | 6 Cyl 3.6 L GAS
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Buick Master Cylinder Part Number: 84927729
$67.89 MSRP: $191.28
You Save: $123.39 (65%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder
- Replaces: 84118574, 84038581
Fits the following Buick Models:
- LaCrosse | 2017-2019 | Avenir, Base, Essence, Preferred, Premium, Sport Touring | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.6 L GAS
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Buick Master Cylinder Part Number: 18029965
$95.95 MSRP: $265.88
You Save: $169.93 (64%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
Fits the following Buick Models:
- Regal | 1995-1996 | Custom, Gran Sport, Limited, Olympic Gold Edition | 6 Cyl 3.1 L GAS, 6 Cyl 3.8 L GAS
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Buick Master Cylinder Part Number: 95414477
$64.13 MSRP: $127.58
You Save: $63.45 (50%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
Fits the following Buick Models:
- Encore | 2016-2022 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Master Cylinder Part Number: 84644599
$101.74 MSRP: $202.41
You Save: $100.67 (50%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 23398838, 84486954
Fits the following Buick Models:
- Enclave | 2018-2024 | Avenir, Base, Essence, Preferred, Premium | 6 Cyl 3.6 L GAS
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Buick Master Cylinder Part Number: 95414483
$149.70 MSRP: $297.80
You Save: $148.10 (50%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 95280508, 95390404, 95128142
Fits the following Buick Models:
- Encore | 2013-2021 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Master Cylinder Part Number: 25509416
$53.64 MSRP: $97.08
You Save: $43.44 (45%)
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaced by: 19537110
Fits the following Buick Models:
- Electra | 1984-1985 | Estate Wagon | 8 Cyl 5.7 L DIESEL
- LeSabre | 1984-1985 | Collector's Edition, Custom, Estate Wagon, Limited | 8 Cyl 5.7 L DIESEL
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Buick Master Cylinder Part Number: 84118577
$111.11 MSRP: $208.66
You Save: $97.55 (47%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
Fits the following Buick Models:
- Regal Sportback | 2018-2020 | Avenir, Base, Essence, GS, Preferred, Preferred II | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
- Regal TourX | 2018-2020 | Base, Essence, Preferred | 4 Cyl 2.0 L GAS
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Buick Master Cylinder Part Number: 18060114
$132.45 MSRP: $248.74
You Save: $116.29 (47%)
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18011970, 18015760
Fits the following Buick Models:
- Century | 1988-1989 | Custom, Estate Wagon, Limited | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.3 L GAS, 6 Cyl 3.8 L GAS
- Skyhawk | 1988-1989 | Custom, SE | 4 Cyl 2.0 L GAS
- Skylark | 1989-1991 | Base, Custom, Gran Sport, Limited, Luxury Edition | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.3 L GAS
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Buick Master Cylinder Part Number: 84667592
$91.17 MSRP: $165.02
You Save: $73.85 (45%)
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Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 23139896
Fits the following Buick Models:
- Envision | 2016-2020 | Base, Essence, Preferred, Premium, Premium II | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS
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Buick Modulator Valve Part Number: 42742904
$925.76 MSRP: $1675.58
You Save: $749.82 (45%)
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Product Specifications
- Other Name: Valve Kit, Electronic Brake Control; ABS Control Module; ABS Control Unit; Cylinder, Brake Master Cylinder
- Replaced by: 42907268
Fits the following Buick Models:
- Encore GX | 2021-2022 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS, 3 Cyl 1.3 L GAS
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Buick ABS Control Unit Part Number: 42823688
$715.64 MSRP: $1178.88
You Save: $463.24 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder
- Replaced by: 42907671
Fits the following Buick Models:
- Envista | 2024-2025 | Avenir, Preferred, Sport Touring | 3 Cyl 1.2 L FLEX, 3 Cyl 1.2 L GAS
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Buick ABS Control Unit Part Number: 42790149
$792.30 MSRP: $1257.90
You Save: $465.60 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve Kit, Electronic Brake Control; Cylinder, Brake Master Cylinder
- Replaced by: 42907267
Fits the following Buick Models:
- Encore GX | 2023 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS, 3 Cyl 1.3 L GAS
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Buick Master Cylinder Part Number: 18021215
$277.53 MSRP: $423.94
You Save: $146.41 (35%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
Fits the following Buick Models:
- Century | 1994-1996 | Custom, Limited, Special | 4 Cyl 2.2 L GAS, 6 Cyl 3.1 L GAS
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Buick Master Cylinder Part Number: 15142479
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
Fits the following Buick Models:
- Rainier | 2006-2007 | CXL | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Overhaul Kit Part Number: 18007935
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Master Cylinder Repair Kit
Fits the following Buick Models:
- Electra | 1989, 1984-1987 | Estate Wagon, Limited, Park Avenue | 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS
- LeSabre | 1984-1990 | 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 Master Cylinder Part Number: 19209200
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 15283583
Fits the following Buick Models:
- Lucerne | 2006-2008 | CX, CXL, CXS, Super | 6 Cyl 3.8 L GAS, 8 Cyl 4.6 L GAS
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Buick Master Cylinder Part Number: 19209266
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18060788, 18044393
Fits the following Buick Models:
- Rainier | 2004-2005 | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Master Cylinder Part Number: 25632708
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Master Cylinder Assembly; Brake Master Cylinder
- Replaces: 25642820
Fits the following Buick Models:
- LeSabre | 1992-1995 | Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1991-1995 | Base, Ultra | 6 Cyl 3.8 L GAS
- Riviera | 1995-1999 | Base | 6 Cyl 3.8 L GAS
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1-20 of 69 Results

Buick Brake Master Cylinder

Choose OEM Brake Master Cylinder, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Buick's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Buick Brake Master Cylinder. You can shop at highly competitive prices and protect your budget. All our genuine Buick parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

Buick Brake Master Cylinder converts pedal pressure to sharp and consistent stopping force throughout the line. The brand was born in 1903 and it has built its name through the manufacturing of cars that ride without noise and absorb bumps. Buick maintained that promise of comfort but added tuning-quiet and driver-centric technology, which provided families and commuters with a serene in-car experience even over rough pavements. The radical Wildcat EV design has the badge heading in the direction of electric motoring without abandoning the luxurious feel that drivers want. All models, sleek crossovers through to roomy sedans, can be identified with heritage lines and a modern trim that do not make anything old-fashioned or overdone. The direct controls and a tradition of non-embroiled longevity that cuts across the generations give its loyal owners added value. Road etiquette remains alert, skimming through parking lots but in a steady stream on the highway, and cabin fencing suppresses the wind noise so the conversation remains unchallenged. The Brake Master Cylinder is in the middle of the hydraulic circuit and has two paths with two pistons that divide the pressure in such a way that a leak in one line never absorbs stopping power, and its cast body resists swelling from the fluid and heat even after long downhill runs. When the pedal is pressed, the Brake Master Cylinder forces fluid to calipers and drums, making each wheel bite with a purpose and also the timing of clutch release to make a well-timed gear change. This intelligent technology provides Buick operators with a solid pedal impression and relaxed tempers in traffic jams.

Buick Brake Master Cylinder Parts and Q&A

Master Cylinder
84073180
Q: How to replace the brake master cylinder on Buick LaCrosse?
A:
Switch off engine power to operate the Brake Pedal multiple times until it feels solid while using up the power vacuum Brake Booster's vacuum pressure reserve. Take off the intake manifold cover only when needed. Securely place a suitable removal tool in the master cylinder reservoir to drain and dispose the brake fluid. Putting the radiator surge tank nearby you can safely remove it without touching coolant or disconnecting the hoses. Unplug the electrical connection for the brake fluid level indicator switch and detach the primary brake pipe master cylinder completion while capping it to maintain the brake fluid system. Afterwards disconnect and cap the master cylinder secondary brake pipe fitting. Lift out the master cylinder while removing its nuts then install the new master cylinder including the o-ring seal. During new master cylinder installation perform the bench bleed procedure to put the o-ring seal perfectly in its groove without deformation. Place the master cylinder with its o-ring seal inside the installation area before tightening the master cylinder nuts to 50 nm (37 lb ft). Install the master cylinder primary brake pipe fitting then bolt it with 18 nm torque followed by fitting the secondary brake pipe using the same torque setting. Plug back in the brake fluid level indicator switch wires before placing the radiator surge tank back. End the hydraulic brake process before reinstalling the intake manifold cover.
Master Cylinder
18022002
Q: How to service and repair the Brake Master Cylinder on Buick Regal?
A:
To repair the Brake Master Cylinder start by locking the mounting flange in a bench vise to reach the base of the main Piston. Install suitable connectors for hose attachment at the master cylinder outlets by removing both cap and diaphragm. Connect clear hoses to these fittings and feed them into the master cylinder reservoir. Put delco supreme 11 brake fluid (GM P/N 12377967 or equivalent DOT-3) into the reservoir until it reaches half its capacity while keeping both hose ends fully underwater from a sealed container. Depress and release the primary Piston 1 inch with a smooth tool several times to check fluid flow from the ports. Your force to push down the primary Piston will grow since the Piston travels a shorter distance when air leaves both pistons. Repeat the method until the fluid streams out naturally without air bubbles appearing. To finish the calibration insert the transparent hoses into the reservoir then put back the reservoir cap and diaphragm. Disconnect the fittings with the hoses from both ports before removing the master cylinder from the vise while keeping it covered by a clean shop cloth to avoid leaks.