How to remove and install a Brake Master Cylinder on Volkswagen Jetta?

Firstly, precautions have to be taken because brake fluid may harm paint or finished surfaces to remove the master cylinder. The master cylinder cannot be serviced, and therefore change it in case it is faulty. Start by unscrewing the engine cover and unplugging the cable of the negative battery terminal. Then take off the battery and battery tray, unscrew electrical connectors of brake fluid level warning switch and brake light switch. Aspirate the reservoir as much as possible and in manual transaxle models unscrew and use a plug to remove the vacuum on the master cylinder hose of the clutch. Unscrew the brake light mounting fastener and switch, then use careful caution to pull the locking tabs on the reservoir outward then raise it off the master cylinder. Clean the surroundings on the fittings of the brake line, remove the brake lines, and seal up all holes to avoid contamination. Unscrew the mounting nuts of the master cylinder and the master cylinder and heat shield of the power booster. In case of installing a new master cylinder, new seals are to be employed when transfers the reservoir. To install, bench bleed the new master cylinder, and connect bleeder tubes to each outlet port and pour the suggested amount of brake fluid into the reservoir. Put the pistons slowly into the master cylinder to push the air out until there are no more bubbles. Take the bleed tubes out and replace them with plugs in the vacant ports and place the reservoir cap. Install the power brake booster with the studs on the master cylinder by screwing in the nuts with fingers and installing the brake line fittings into the master cylinder. Fix the mounting nuts and fittings of the brake lines tightly. In the case of manual transaxle models, attach the hose of the clutch master cylinder. Dump the master cylinder reservoir into the fluid, then bleed the master cylinder and brake system by having an assistant press the brake pedal and loosen the fitting so that air and fluid could escape. Repeat until no air bubbles are left in the fluid and be sure to have rags ready to slop any fluid. When bleeding is finished, wash the place beneath master cylinder thoroughly with clean water and make sure that the brake system is working properly and then resume regular service of the vehicle.

How to remove and install a Brake Master Cylinder on Volkswagen Rabbit?

To replace the master cylinder, first precautions need to be taken since brake fluid may harm painted or finished surfaces. Dislike battery Take off battery and tray, but not the negative battery terminal. Disconnect the electrical connectors of the brake fluid level warning switch and one, in models since November 2005, of the brake light switch. Get as much fluid out of the reservoir as possible, disconnect the hose to the clutch master cylinder, and plug it in, where possible. Take an extreme care in opening the locking tabs of the reservoir and removing it. Wipe the space around the brake line fittings and remove the brake lines capping all holes to avoid contamination. Unscrew the mounting nuts of the master cylinder and unscrew the master cylinder off the power booster making sure to replace the old seals in case of installing a new master cylinder. Installation requires bleed of the new master cylinder with bleeder tubes to flow the fluid into the reservoir. Pour in the suggested brake fluid into the reservoir and carefully force the pistons into the master cylinder to release the air. Continue until all the air bubbles vanish, then use plugs in the open ports and the reservoir cap. Fit the master cylinder through the power brake booster studs by screwing the nuts with fingers as well as threading brake line fitting in the master cylinder. Screw the mounting fittings and nuts firmly. Reconnect a clutch master cylinder hose where needed and refill the reservoir with fluid and bleed the master cylinder/brake system. The brake system should be tested in operation and then the vehicle should be reintroduced into normal service.

Genuine Volkswagen Brake Master Cylinder

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39 Brake Master Cylinders found

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Volkswagen Master Cylinder Part Number: 5QM-614-019-G
$55.98 MSRP: $77.75
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- Golf | 2020-2021 | TSi | 4 Cyl 1.4 L GAS
- Jetta | 2019-2024 | GLI Autobahn, GLI S, R-Line, S, SE, SEL, SEL Premium, Sport | 4 Cyl 1.4 L GAS, 4 Cyl 1.5 L GAS, 4 Cyl 2.0 L GAS
- Taos | 2022-2024 | S, SE, SEL | 4 Cyl 1.5 L GAS
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Volkswagen Master Cylinder Part Number: 5QM-614-019-C
$87.45 MSRP: $122.48
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Product Specifications
- Other Name: Cylinder; Master Cylinder
Fits the following Volkswagen Models:
- Jetta | 2019 | GLI 35th Anniversary Edition, GLI Autobahn, GLI S, R-Line, S, SE, SEL, SEL Premium | 4 Cyl 1.4 L GAS, 4 Cyl 2.0 L GAS
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Volkswagen Master Cylinder Part Number: 3Q1-614-019-E
$172.22 MSRP: $241.20
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- Arteon | 2019-2023 | SE, SE R-Line, SEL, SEL Premium, SEL Premium R-Line, SEL R-Line | 4 Cyl 2.0 L GAS
- GTI | 2022-2024 | 40th Anniversary Edition, Autobahn, S, SE | 4 Cyl 2.0 L GAS
- Golf R | 2022-2023 | 20th Anniversary Edition, Base | 4 Cyl 2.0 L GAS
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Volkswagen Master Cylinder Part Number: 1K1-614-019-AH
$204.91 MSRP: $286.99
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Product Specifications
- Other Name: Cylinder; Brake Booster, Master Cylinder
Fits the following Volkswagen Models:
- Passat | 2016-2022 | GT, Limited Edition, R-Line, S, SE, SE R-Line, SEL, SEL Premium, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
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Volkswagen Master Cylinder Part Number: 3C1-614-019-D-REP
$222.40 MSRP: $311.48
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- CC | 2016-2017, 2009-2010 | Luxury, R-Line, R-Line Executive, Sport, Trend, V6 Executive 4Motion, VR6, VR6 Sport | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
- Passat | 2006-2010 | 2.0T, 3.6, Komfort, Lux, Turbo, Value Edition, VR6, Wolfsburg Edition | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
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Volkswagen Master Cylinder Part Number: 3C1-614-019-J-REP
$222.40 MSRP: $311.48
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Product Specifications
- Other Name: Cylinder; Master Cylinder
Fits the following Volkswagen Models:
- CC | 2009-2017 | 4 Motion, Executive, Executive 4 Motion, Lux, Lux Limited, Lux Plus, Luxury, R-Line, R-Line Executive, Sport, Sport Plus, Trend, V6 Executive 4Motion, VR6, VR6 4Motion, VR6 4Motion Executive, VR6 Sport | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
- Passat | 2006-2008 | 2.0T, 3.6, Komfort, Lux, Turbo, Value Edition, VR6, Wolfsburg Edition | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
- Tiguan | 2009-2017 | R-Line, S, SE, SEL, Sport, Wolfsburg Edition | 4 Cyl 2.0 L GAS
- Tiguan Limited | 2017-2018 | Base | 4 Cyl 2.0 L GAS
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Volkswagen Master Cylinder Part Number: 1J1-614-019-A
$217.77 MSRP: $305.00
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- Golf | 2001 | GL, GLS, GTI GLS, GTI GLX | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 2001 | GL, GLS, GLX, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Master Cylinder Part Number: 5QM-614-019-H
$35.53 MSRP: $59.22
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- Atlas | 2024 | Peak Edition SE, Peak Edition SEL, SE, SEL, SEL Premium R-Line | 4 Cyl 2.0 L GAS
- Atlas Cross Sport | 2020-2024 | S, SE, SE R-Line, SEL, SEL Premium, SEL Premium R-Line, SEL R-Line, SEL R-Line Black | 4 Cyl 2.0 L GAS, 6 Cyl 3.6 L GAS
- GTI | 2019-2021 | Autobahn, Rabbit Edition, S, SE | 4 Cyl 2.0 L GAS
- Jetta | 2019-2024 | GLI 35th Anniversary Edition, GLI Autobahn, GLI S, R-Line, S, SE, SEL, SEL Premium, Sport | 4 Cyl 1.4 L GAS, 4 Cyl 1.5 L GAS, 4 Cyl 2.0 L GAS
- Tiguan | 2019-2024 | S, SE, SE R-Line Black, SEL, SEL Premium, SEL Premium R-Line, SEL R-Line, SEL R-Line Jet Black | 4 Cyl 2.0 L GAS
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Volkswagen Master Cylinder Part Number: 8D0-611-021-B
$248.88 MSRP: $340.00
You Save: $91.12 (27%)
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- Passat | 1998-1999 | GLS, GLX | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Master Cylinder Part Number: 1J1-614-019-F
$262.59 MSRP: $358.73
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Product Specifications
- Other Name: Cylinder
- Replaces: 1J1-614-019-C
Fits the following Volkswagen Models:
- Beetle | 2002-2010 | 2.5, Base, GL, GLS, GLS TDI, GLX, S, SE, TDI, Turbo S | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS
- Golf | 2002-2006 | GL, GL TDI, GLS, GLS TDI, GTI 1.8T, GTI 20th Anniversary, GTI 337, GTI VR6, TDI | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 2001-2005 | GL, GL TDI, GLI, GLS, GLS TDI, GLX, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- R32 | 2004 | Base | 6 Cyl 3.2 L GAS
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Volkswagen Master Cylinder Part Number: 357-611-019-B
$250.34 MSRP: $342.00
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Product Specifications
- Other Name: Cylinder
- Replaces: 1H1-611-019-B
Fits the following Volkswagen Models:
- Corrado | 1991-1994 | G60, SLC | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- EuroVan | 1995, 1993 | Base, Camper, CL, GL, GLS, MV, Transport | 5 Cyl 2.4 L DIESEL, 5 Cyl 2.5 L GAS
- Fox | 1991-1993 | Base, GL | 4 Cyl 1.8 L GAS
- Golf | 1993-1999 | Celebration Edition, City, GL, GTI, GTI VR6, Jazz, K2, Limited Edition, Sport, Trek, Wolfsburg Edition | 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 1991-1999 | Celebration Edition, City, GL, GLI 16-Valve, GLS, GLX, GT, Jazz, K2, Limited Edition, TDI, Trek, Wolfsburg Edition | 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Passat | 1991-1996 | CL, GL, GLS, GLX, TDI | 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Master Cylinder Part Number: 1J1-614-019-J
$269.00 MSRP: $367.48
You Save: $98.48 (27%)
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Product Specifications
- Other Name: Cylinder
- Replaces: 1J1-614-019-H, 1J1-614-019-E
Fits the following Volkswagen Models:
- Beetle | 2005-2010 | 2.5, Base, GL, GLS, GLS TDI, S, SE, TDI | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS
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Volkswagen Master Cylinder Part Number: 1K1-614-019-AG
$272.19 MSRP: $371.86
You Save: $99.67 (27%)
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Product Specifications
- Other Name: Cylinder; Brake Booster, Master Cylinder
- Replaces: 1K1-614-019-N, 1K1-614-019-AA, 1K1-614-019-S
Fits the following Volkswagen Models:
- Jetta | 2012-2013 | S, SE, SEL | 5 Cyl 2.5 L GAS
- Passat | 2012-2017 | Limited Edition, R-Line, S, SE, SEL, SEL Premium, Sport, TDI SE, TDI SEL, TDI SEL Premium, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 5 Cyl 2.5 L GAS, 6 Cyl 3.6 L GAS
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Volkswagen Master Cylinder Part Number: 8E0-611-021
$278.60 MSRP: $380.61
You Save: $102.01 (27%)
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Product Specifications
- Other Name: Cylinder
Fits the following Volkswagen Models:
- Passat | 2002-2005 | GL, GL TDI, GLS, GLS 4 Motion, GLS TDI, GLX, GLX 4 Motion, W8 | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 6 Cyl 2.8 L GAS, 8 Cyl 4.0 L GAS
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Volkswagen Master Cylinder Part Number: 1K1-614-019-F
$268.39 MSRP: $366.65
You Save: $98.26 (27%)
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Product Specifications
- Other Name: Cylinder
- Replaces: 1K1-614-019-B
Fits the following Volkswagen Models:
- GTI | 2008-2011 | Base | 4 Cyl 2.0 L GAS
- Golf | 2010-2011 | Base, TDI | 4 Cyl 2.0 L DIESEL, 5 Cyl 2.5 L GAS
- R32 | 2008 | Base | 6 Cyl 3.2 L GAS
- Rabbit | 2008-2009 | S | 5 Cyl 2.5 L GAS
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Volkswagen Master Cylinder Part Number: 1K1-614-019-K
$281.81 MSRP: $384.98
You Save: $103.17 (27%)
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Product Specifications
- Other Name: Cylinder
- Replaces: 1K1-614-019-D, 1K1-614-019
Fits the following Volkswagen Models:
- Eos | 2007-2016 | 2.0T, 3.2, Base, Executive, Final Edition, Komfort, Lux, Sport, Turbo, VR6 | 4 Cyl 2.0 L GAS, 6 Cyl 3.2 L GAS
- GTI | 2006-2014 | Base, Driver's Edition, Fahrenheit, Wolfsburg Edition | 4 Cyl 2.0 L GAS
- Golf | 2010-2014 | Base, TDI | 4 Cyl 2.0 L DIESEL, 5 Cyl 2.5 L GAS
- Golf R | 2012-2013 | Base | 4 Cyl 2.0 L GAS
- Rabbit | 2006-2009 | 2.5, S | 5 Cyl 2.5 L GAS
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Volkswagen Master Cylinder Part Number: 1J1-614-019-K
$285.00 MSRP: $389.36
You Save: $104.36 (27%)
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Product Specifications
- Other Name: Cylinder; Master Cylinder
Fits the following Volkswagen Models:
- Beetle | 1998-2005 | Base, GL, GLS, GLS TDI, GLX, Sport, TDI | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS
- Golf | 1999-2006 | GL, GL TDI, GLS, GLS TDI, GTI, GTI 1.8T, GTI 20th Anniversary, GTI 337, GTI GLS, GTI GLX, GTI VR6, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 1999-2005 | GL, GL TDI, GLI, GLS, GLS TDI, GLX, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- R32 | 2004 | Base | 6 Cyl 3.2 L GAS
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Volkswagen Master Cylinder Part Number: 5Q1-614-019-Q-REP
$288.21 MSRP: $393.74
You Save: $105.53 (27%)
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Product Specifications
- Other Name: Cylinder; Master Cylinder
- Replaces: 5Q1-614-019-P-REP
Fits the following Volkswagen Models:
- Arteon | 2019 | SE, SE R-Line, SEL, SEL Premium, SEL Premium R-Line, SEL R-Line | 4 Cyl 2.0 L GAS
- Golf | 2015-2021 | Base, Launch Edition, S, SE, SEL, TDI S, TDI SE, TDI SEL, TSi, Wolfsburg Edition | 4 Cyl 1.4 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL
- Golf Alltrack | 2017-2019 | S, SE, SEL | 4 Cyl 1.8 L GAS
- Golf SportWagen | 2015-2019 | Limited Edition, S, SE, SEL, TDI S, TDI SE, TDI SEL | 4 Cyl 1.4 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL
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Volkswagen Master Cylinder Part Number: 1K1-614-019-AF
$294.62 MSRP: $402.49
You Save: $107.87 (27%)
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Product Specifications
- Other Name: Cylinder; Master Cylinder
- Replaces: 1K1-614-019-R, 1K1-614-019-T, 1K1-614-019-M, 1K1-614-019-C, 1K1-614-019-G
Fits the following Volkswagen Models:
- Beetle | 2012-2019 | #PinkBeetle, Base, Classic, Coast, Denim, Dune, Final Edition SE, Final Edition SEL, Fleet Edition, GSR, R-Line, R-Line S, R-Line SE, R-Line SEL, S, SE, SEL, TDI, Turbo, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS
- Golf | 2010 | Base, TDI | 4 Cyl 2.0 L DIESEL, 5 Cyl 2.5 L GAS
- Jetta | 2005-2018 | 2.0T, 2.5, Base, GL, GL TDI, GLI, GLI SE, GLI SEL, GLS, GLS TDI, S, SE, SE Sport, SEL, SEL Premium, Sport, TDI, TDI Cup Edition, TDI Premium, TDI S, TDI SE, TDI SEL, Value Edition, Wolfsburg Edition | 4 Cyl 1.4 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS
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Volkswagen Master Cylinder Part Number: 1K1-614-019-L
$294.62 MSRP: $402.49
You Save: $107.87 (27%)
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Product Specifications
- Other Name: Cylinder; Brake Booster
- Replaces: 1K1-614-019-E
Fits the following Volkswagen Models:
- Passat | 2012 | S, SE, SEL, SEL Premium, TDI SE, TDI SEL | 4 Cyl 2.0 L DIESEL, 5 Cyl 2.5 L GAS, 6 Cyl 3.6 L GAS
- R32 | 2008 | Base | 6 Cyl 3.2 L GAS

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Volkswagen Brake Master Cylinder

Volkswagen Brake Master Cylinder takes a pedal force and turns it into precise hydraulic pressure, allowing every driver of a VW to have predictable stopping power and safety protection thanks to a robust dual-circuit design. Founded in 1937 in the city of Wolfsburg, the brand earned its name for the Beetle and Type 2 van; that same mindset of practical innovation still applies to today's VW vehicles that include TSI turbo engines, direct injection, the flexible MQB platform, the digital cockpit, and the growing list of ID electric vehicles. Clean lines, solid body construction, and intuitive MIB infotainment display how the brand combines style with reliable engineering, while park assist and head-up displays allow young and experienced drivers to feel confident. Whether cruising in a compact hatchback, a roomy SUV, or a sleek Arteon fastback, VW owners like the consistency of quality, clever packaging, and a clear focus on everyday value. Housed in sturdy cast iron or lightweight aluminum, the Brake Master Cylinder utilizes twin pistons and a generous reservoir to force fluid smoothly through high-pressure lines to keep brakes ready even if one circuit experiences loss of pressure. Its positioning in front of the vacuum booster reduces flow paths and response time, and corrosion-resistant components mean reduced maintenance requirements. By bringing together solid materials, easy serviceability, and fail-safe redundancy, this component reinforces the entire lineup and enables owners to stop with confidence.

Buying OEM parts is a smart move to keep your long-term repair costs low. These components are built to last because VW uses such strict factory standards. At VWPartsGiant.com, it is easy to find genuine Volkswagen Brake Master Cylinder at prices that actually beat the competition. You get a real manufacturer's warranty with every single part, so you know your purchase is safe. Plus, forget about return headaches since our policy is easy and worry-free. We ship your order fast, too. If you have questions, our team of parts experts is ready to help. Why wait? Start shopping now!

Volkswagen Brake Master Cylinder Parts and Q&A

Master Cylinder
1K1-614-019-AB
Q: How to remove and install a Brake Master Cylinder on Volkswagen Jetta?
A:
Firstly, precautions have to be taken because brake fluid may harm paint or finished surfaces to remove the master cylinder. The master cylinder cannot be serviced, and therefore change it in case it is faulty. Start by unscrewing the engine cover and unplugging the cable of the negative battery terminal. Then take off the battery and battery tray, unscrew electrical connectors of brake fluid level warning switch and brake light switch. Aspirate the reservoir as much as possible and in manual transaxle models unscrew and use a plug to remove the vacuum on the master cylinder hose of the clutch. Unscrew the brake light mounting fastener and switch, then use careful caution to pull the locking tabs on the reservoir outward then raise it off the master cylinder. Clean the surroundings on the fittings of the brake line, remove the brake lines, and seal up all holes to avoid contamination. Unscrew the mounting nuts of the master cylinder and the master cylinder and heat shield of the power booster. In case of installing a new master cylinder, new seals are to be employed when transfers the reservoir. To install, bench bleed the new master cylinder, and connect bleeder tubes to each outlet port and pour the suggested amount of brake fluid into the reservoir. Put the pistons slowly into the master cylinder to push the air out until there are no more bubbles. Take the bleed tubes out and replace them with plugs in the vacant ports and place the reservoir cap. Install the power brake booster with the studs on the master cylinder by screwing in the nuts with fingers and installing the brake line fittings into the master cylinder. Fix the mounting nuts and fittings of the brake lines tightly. In the case of manual transaxle models, attach the hose of the clutch master cylinder. Dump the master cylinder reservoir into the fluid, then bleed the master cylinder and brake system by having an assistant press the brake pedal and loosen the fitting so that air and fluid could escape. Repeat until no air bubbles are left in the fluid and be sure to have rags ready to slop any fluid. When bleeding is finished, wash the place beneath master cylinder thoroughly with clean water and make sure that the brake system is working properly and then resume regular service of the vehicle.
Master Cylinder
1K1-614-019-F
Q: How to remove and install a Brake Master Cylinder on Volkswagen Rabbit?
A:
To replace the master cylinder, first precautions need to be taken since brake fluid may harm painted or finished surfaces. Dislike battery Take off battery and tray, but not the negative battery terminal. Disconnect the electrical connectors of the brake fluid level warning switch and one, in models since November 2005, of the brake light switch. Get as much fluid out of the reservoir as possible, disconnect the hose to the clutch master cylinder, and plug it in, where possible. Take an extreme care in opening the locking tabs of the reservoir and removing it. Wipe the space around the brake line fittings and remove the brake lines capping all holes to avoid contamination. Unscrew the mounting nuts of the master cylinder and unscrew the master cylinder off the power booster making sure to replace the old seals in case of installing a new master cylinder. Installation requires bleed of the new master cylinder with bleeder tubes to flow the fluid into the reservoir. Pour in the suggested brake fluid into the reservoir and carefully force the pistons into the master cylinder to release the air. Continue until all the air bubbles vanish, then use plugs in the open ports and the reservoir cap. Fit the master cylinder through the power brake booster studs by screwing the nuts with fingers as well as threading brake line fitting in the master cylinder. Screw the mounting fittings and nuts firmly. Reconnect a clutch master cylinder hose where needed and refill the reservoir with fluid and bleed the master cylinder/brake system. The brake system should be tested in operation and then the vehicle should be reintroduced into normal service.