How to maintain and replace the power brake booster unit on Subaru Legacy?

Also, the power brake booster unit does not need any special maintenance, but it may require a regular check on vacuum hose and its casing. To check if it is working properly press the pedal without starting the engine for several times; there should be no change in pedal reserve distance. Next, push the pedal and start your engine. If it slightly goes down, then everything is alright. For air tightness inspection, start an engine and switch off after one or two minutes of running. Then slowly depress the pedal. If on first depression the pedal goes further down and then gradually rises on second and third depressions means that booster is airtight. In addition to that, with your engine running,repeatedly press the brake pedal down until you stop the car by depressing the brake pedal at once,till when you have held down for 30 seconds without any change in reserve travel of pedal,this booster is airtight.In case this booster has malfunctioned ,it cannot be repaired but must be changed with a new or rebuilt unit. To take out this booster disconnect vacuum hose ,remove master cylinder as well.Then inside vehicle remove cotter pin,pushrod clevis pin to unlock brake booster pushrod clevis from behind brake pedals.Lastly remove four nuts from firewall that holds back up into place.Remove those four nuts from back side of firewall.Relatively speaking,it is simple for installation though tightening of those nuts which hold this booster against dashboard must be done.If new power brake boosters are being used,the length of push rod can be adjusted by turning it to right position using adjusting nut which will eventually lock nut.To complete,the last thing to do before hitting road again would be bleeding brakes again.

Genuine Subaru Legacy Brake Booster

Brake Power Booster

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25 Brake Boosters found

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Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AJ01A
$285.30 MSRP: $417.10
You Save: $131.80 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Replaced by: 26402AJ201
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2014 Subaru Legacy | 2.5GT Limited, 2.5GT Premium, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring, 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 2.5L H4 DOHC, 2.5L H4 SOHC, 2.5L H4 Turbo, 3.6L H6
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Subaru Legacy Gasket Booster
Part Number: 26467AJ00A
$4.36 MSRP: $6.32
You Save: $1.96 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Gasket; Booster Assembly Gasket
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2017 Subaru Legacy | 2.5GT Limited, 2.5GT Premium, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring, 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 2.5L H4, 2.5L H4 DOHC, 2.5L H4 SOHC, 2.5L H4 Turbo, 3.6L H6
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Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AE32A
$121.44 MSRP: $176.00
You Save: $54.56 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2002-2004 Subaru Legacy | Base, Brighton, Cold Weather, Flat6, Flat6 L.L.Bean, Flat6-S, GT, L, Limited, SUS Flat6, SUS Limited | 2.5L H4, 3.0L H6
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Subaru Legacy Vacuum Booster Assembly
Part Number: 26402AJ17A
$285.30 MSRP: $417.10
You Save: $131.80 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 26402AJ201
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2012 Subaru Legacy | 2.5GT Limited, 2.5i, 2.5i Limited, 2.5i Premium, 3.6R, 3.6R Limited, 3.6R Premium | 2.5L H4 SOHC, 2.5L H4 Turbo, 3.6L H6
View related parts
Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AL12A
$99.94 MSRP: $144.83
You Save: $44.89 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Vac BSTR Assembly Lh
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2018-2019 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 3.6R, 3.6R Limited, 3.6R Premium | 2.5L H4, 3.6L H6
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Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AL13A
$103.34 MSRP: $149.77
You Save: $46.43 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Vac BSTR Assembly Lh
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2018-2019 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring, 3.6R Limited, 3.6R Touring | 2.5L H4, 3.6L H6
View related parts
Subaru Legacy Vac BSTR Assembly LH
Part Number: 26402AN00A
$107.27 MSRP: $155.47
You Save: $48.20 (31%)
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.4L H4 DIT, 2.5L H4 DI
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Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AG15A
$359.10 MSRP: $525.00
You Save: $165.90 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Replaced by: 26402AG260
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2007-2009 Subaru Legacy | 2.5i, 2.5i Base, 2.5i Limited, 3.0R, 3.0R Limited, 3.0R LL-Bean, Base, GT, GT Limited, XT Limited | 2.5L H4, 2.5L H4 Turbo, 3.0L H6
View related parts
Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AE05A
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2000-2001 Subaru Legacy | Base, Cold Weather, Flat6, Flat6 L.L.Bean, GT, L, Limited, SUS Limited | 2.5L H4, 3.0L H6
View related parts
Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AG05A
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2006 Subaru Legacy | GT, GT Limited | 2.5L H4 Turbo
View related parts
Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AG04A
Product Specifications
- Other Name: Vacuum Booster Assembly; Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2006 Subaru Legacy | 2.5i, 2.5i Limited | 2.5L H4
View related parts
Subaru Legacy Vacuum Booster Assembly
Part Number: 26402FA061
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1995-1999 Subaru Legacy | Post | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series
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Subaru Legacy Vacuum Booster Assembly
Part Number: 26402AE200
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2001 Subaru Legacy | Flat6 | 3.0L H6
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Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AE47A
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2003-2004 Subaru Legacy | Baja, Baja-B, Baja-S | 2.5L H4, 2.5L H4 Turbo
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Subaru Legacy Vacuum Booster Assembly
Part Number: 26402AC110
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1999 Subaru Legacy | L | 2.2L H4 Series
View related parts
Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AE04A
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2000-2001 Subaru Legacy | Brighton | 2.5L H4
View related parts
Subaru Legacy Vacuum Booster Assembly
Part Number: 26402AE310
Product Specifications
- Other Name: Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2002-2004 Subaru Legacy | Flat6, SUS Flat6 | 3.0L H6
View related parts
Subaru Legacy Vacuum BSTR Assembly LH
Part Number: 26402AG06A
Product Specifications
- Other Name: Vacuum Booster Assembly; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2006 Subaru Legacy | 2.5i, 2.5i Limited, 3.0R, 3.0R Limited, 3.0R LL-Bean, GT, GT Limited | 2.5L H4, 2.5L H4 Turbo, 3.0L H6
View related parts
Subaru Legacy Vacuum Booster Assembly
Part Number: 26402FA071
Product Specifications
- Other Name: Brake Booster
- Replaces: 26402FA070
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1995-1999 Subaru Legacy | Base, Brighton, L | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series
View related parts
Subaru Legacy Master Vacuum Assembly
Part Number: 26402AA264
Product Specifications
- Other Name: Vacuum Booster Assembly; Brake Booster
- Replaces: 26402AA260, 26402AA262, 26402AA261, 26402AA263
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1991-1994 Subaru Legacy | Turbo

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Subaru Legacy Brake Booster

Our website stands as the go-to online destination for OEM Subaru Legacy Brake Booster. With complete lines of genuine Subaru Legacy Brake Booster available at unbeatable market prices, we ensure top quality, reliability, and durability. Each part comes backed by the manufacturer's warranty, reinforcing your trust in our offerings.

Subaru Legacy Brake Booster Parts Questions & Experts Answers

Vacuum BSTR Assembly LH
26402AE32A
Q: How to maintain and replace the power brake booster unit on Subaru Legacy?
A: Also, the power brake booster unit does not need any special maintenance, but it may require a regular check on vacuum hose and its casing. To check if it is working properly press the pedal without starting the engine for several times; there should be no change in pedal reserve distance. Next, push the pedal and start your engine. If it slightly goes down, then everything is alright. For air tightness inspection, start an engine and switch off after one or two minutes of running. Then slowly depress the pedal. If on first depression the pedal goes further down and then gradually rises on second and third depressions means that booster is airtight. In addition to that, with your engine running,repeatedly press the brake pedal down until you stop the car by depressing the brake pedal at once,till when you have held down for 30 seconds without any change in reserve travel of pedal,this booster is airtight.In case this booster has malfunctioned ,it cannot be repaired but must be changed with a new or rebuilt unit. To take out this booster disconnect vacuum hose ,remove master cylinder as well.Then inside vehicle remove cotter pin,pushrod clevis pin to unlock brake booster pushrod clevis from behind brake pedals.Lastly remove four nuts from firewall that holds back up into place.Remove those four nuts from back side of firewall.Relatively speaking,it is simple for installation though tightening of those nuts which hold this booster against dashboard must be done.If new power brake boosters are being used,the length of push rod can be adjusted by turning it to right position using adjusting nut which will eventually lock nut.To complete,the last thing to do before hitting road again would be bleeding brakes again.