How to test and replace the power brake booster on Subaru Outback?

The power brake booster needs only regular checks of the vacuum hose and case. Test operation by pressing the brake pedal several times with the engine off, ensuring no change in pedal reserve distance. If the pedal lowers slightly when the engine is on, it's functioning correctly. Test air tightness by starting the engine, turning it off after a minute, then pressing the pedal slowly a few times. If the pedal lowers initially but rises after a few presses, the booster is airtight. If defective, replace the booster. Removal involves disconnecting the vacuum hose, removing the master cylinder, disconnecting the booster pushrod clevis, and removing the four booster-to-firewall nuts. Reverse these steps for installation, adjust the pushrod if needed, and bleed the brakes.

Genuine Subaru Outback Brake Booster

Brake Power Booster

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

20 Brake Boosters found

View related parts
Subaru Outback Vacuum BSTR Assembly LH
Part Number: 26402AJ01A
$295.31 MSRP: $417.10
You Save: $121.79 (30%)
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 Outback | 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
View related parts
Subaru Outback Gasket Booster
Part Number: 26467AJ00A
$4.55 MSRP: $6.32
You Save: $1.77 (29%)
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 Outback | 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
View related parts
Subaru Outback Vacuum BSTR Assembly LH
Part Number: 26402AE32A
$126.72 MSRP: $176.00
You Save: $49.28 (28%)
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 Outback | Base, Brighton, Cold Weather, Flat6, Flat6 L.L.Bean, Flat6-S, GT, L, Limited, SUS Flat6, SUS Limited | 2.5L H4, 3.0L H6
View related parts
Subaru Outback Vacuum Booster Assembly
Part Number: 26402AJ17A
$295.31 MSRP: $417.10
You Save: $121.79 (30%)
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 Outback | 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 Outback Vacuum BSTR Assembly LH
Part Number: 26402AL12A
$104.28 MSRP: $144.83
You Save: $40.55 (28%)
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 Outback | 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
View related parts
Subaru Outback Vacuum BSTR Assembly LH
Part Number: 26402AL13A
$107.83 MSRP: $149.77
You Save: $41.94 (28%)
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 Outback | 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 Outback Vacuum BSTR Assembly LH
Part Number: 26402AG15A
$367.92 MSRP: $525.00
You Save: $157.08 (30%)
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 Outback | 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 Outback 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 Outback | Base, Cold Weather, Flat6, Flat6 L.L.Bean, GT, L, Limited, SUS Limited | 2.5L H4, 3.0L H6
View related parts
Subaru Outback 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 Outback | GT, GT Limited | 2.5L H4 Turbo
View related parts
Subaru Outback Vac BSTR Assembly LH
Part Number: 26402AN00A
$111.94 MSRP: $155.47
You Save: $43.53 (28%)
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Outback | 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
View related parts
Subaru Outback 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 Outback | 2.5i, 2.5i Limited | 2.5L H4
View related parts
Subaru Outback Vacuum Booster Assembly
Part Number: 26402FA061
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1996-1999 Subaru Outback | Post | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series
View related parts
Subaru Outback 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 Outback | Flat6 | 3.0L H6
View related parts
Subaru Outback 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 Outback | Baja, Baja-B, Baja-S | 2.5L H4, 2.5L H4 Turbo
View related parts
Subaru Outback 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 Outback | L | 2.2L H4 Series
View related parts
Subaru Outback 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 Outback | Brighton | 2.5L H4
View related parts
Subaru Outback 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 Outback | Flat6, SUS Flat6 | 3.0L H6
View related parts
Subaru Outback 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 Outback | 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 Outback 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:
- 1996-1999 Subaru Outback | Brighton, L | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series
View related parts
Subaru Outback Master Vacuum Assembly
Part Number: 26402AA236
Product Specifications
- Other Name: Vacuum Booster Assembly; Brake Booster
- Replaces: 26402AA232, 26402AA235, 26402AA231, 26402AA234, 26402AA230, 26402AA233
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1996-1999 Subaru Outback | GT, L, LS, LS-I, Out Back, SUS | 2.2L H4 , 2.2L H4 (New EVAPO), 2.5L H4

Subaru Outback Brake Booster

Our website stands as the go-to online destination for OEM Subaru Outback Brake Booster. With complete lines of genuine Subaru Outback 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 Outback Brake Booster Parts Questions & Experts Answers

Gasket Booster
26467AJ00A
Q: How to test and replace the power brake booster on Subaru Outback?
A: The power brake booster needs only regular checks of the vacuum hose and case. Test operation by pressing the brake pedal several times with the engine off, ensuring no change in pedal reserve distance. If the pedal lowers slightly when the engine is on, it's functioning correctly. Test air tightness by starting the engine, turning it off after a minute, then pressing the pedal slowly a few times. If the pedal lowers initially but rises after a few presses, the booster is airtight. If defective, replace the booster. Removal involves disconnecting the vacuum hose, removing the master cylinder, disconnecting the booster pushrod clevis, and removing the four booster-to-firewall nuts. Reverse these steps for installation, adjust the pushrod if needed, and bleed the brakes.