How to operate, check, remove, and install a power brake booster on Toyota Celica?

To perform an operating check, depress the brake pedal several times with the engine off, ensuring no change in the pedal reserve distance. Start the engine while depressing the pedal; a slight drop indicates normal operation. For an airtightness check, start the engine and turn it off after one or two minutes, then slowly depress the brake pedal several times; if the pedal depresses less each time, the booster is airtight. While the engine runs, depress the brake pedal, then stop the engine with the pedal held down; if there's no change in pedal reserve travel after 30 seconds, the booster is airtight. Power brake booster units should not be disassembled due to their complexity and critical role in brake performance; they should be replaced with new or rebuilt units. To remove the booster, first remove the brake master cylinder, then take out the left side under-dash panel to access the pushrod clevis connecting the booster to the brake pedal. Remove the clevis pin retaining clip and pull out the pin, then unscrew the locknut to loosen the clevis. Disconnect the hose from the engine to the booster, taking care not to damage it, and remove the four nuts and washers securing the brake booster to the firewall. Slide the booster straight out until the studs clear the holes. For installation, follow the reverse of removal, tightening the clevis locknut and booster mounting nuts to the specified torque. If replacing the power booster unit, measure and adjust the clearance between the master cylinder piston and the pushrod in the vacuum booster as necessary, ensuring no clearance or interference exists. Finally, after installing the master cylinder and brake hoses, adjust the brake pedal height and freeplay, and bleed the system.

Genuine Toyota Celica Brake Booster

Brake Power Booster

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38 Brake Boosters found

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Toyota Celica Brake Booster Assembly
Part Number: 44610-2G080
$618.87 MSRP: $924.06
You Save: $305.19 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Booster Assy, Brake; Booster Assembly, Brake Booster
- Replaces: 44610-2G020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2005 Toyota Celica | 4 Cyl 1.8L | 1ZZFE, 2ZZGE; ZZT230L-BLMSHA, ZZT230L-BLPSHA, ZZT231L-BLFVFA, ZZT231L-BLPVFA
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Toyota Celica Brake Booster Assembly
Part Number: 44610-2G040
$542.02 MSRP: $809.30
You Save: $267.28 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Booster Assy, Brake
- Replaced by: 44610-2G060
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000 Toyota Celica | 4 Cyl 1.8L | 1ZZFE, 2ZZGE; ZZT230L-BLMSHA, ZZT230L-BLPSHA, ZZT231L-BLFVFA, ZZT231L-BLPVFA
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Toyota Celica Brake Booster Assembly
Part Number: 44610-2B600
$552.32 MSRP: $824.69
You Save: $272.37 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Booster Assy, Brake
- Replaced by: 44610-2B601
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1990-1991 Toyota Celica | GT, GTS, ST, Turbo 4WD, Turbo All Trac | 4 Cyl 1.6L, 4 Cyl 2.0L, 4 Cyl 2.2L | 3SGTE, 4AFE, 5SFE; AT180L-BCMSKA, AT180L-BCMSKK, AT180L-BCPSKA, AT180L-BCPSKK, ST184L-BCMGKA, ST184L-BCMGKK, ST184L-BCPGKA, ST184L-BCPGKK, ST184L-BKMGKA, ST184L-BKPGKA, ST184L-BLMGKA, ST184L-BLMGKK, ST184L-BLMVKA, ST184L-BLMVKK, ST184L-BLPGKA, ST184L-BLPGKK, ST184L-BLPVKA, ST184L-BLPVKK, ST185L-BLMVZA, ST185L-BLMVZK
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Toyota Celica Brake Booster Assembly
Part Number: 44610-2B620
$574.73 MSRP: $858.16
You Save: $283.43 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Booster Assy, Brake
- Replaced by: 44610-2B621
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1990-1991 Toyota Celica | GT, GTS, ST, Turbo 4WD, Turbo All Trac | 4 Cyl 1.6L, 4 Cyl 2.0L, 4 Cyl 2.2L | 3SGTE, 4AFE, 5SFE; AT180L-BCMSKA, AT180L-BCMSKK, AT180L-BCPSKA, AT180L-BCPSKK, ST184L-BCMGKA, ST184L-BCMGKK, ST184L-BCPGKA, ST184L-BCPGKK, ST184L-BKMGKA, ST184L-BKPGKA, ST184L-BLMGKA, ST184L-BLMGKK, ST184L-BLMVKA, ST184L-BLMVKK, ST184L-BLPGKA, ST184L-BLPGKK, ST184L-BLPVKA, ST184L-BLPVKK, ST185L-BLMVZA, ST185L-BLMVZK
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Toyota Celica Brake Booster Assembly
Part Number: 44610-2G020
$618.87 MSRP: $924.06
You Save: $305.19 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Booster Assy, Brake
- Replaced by: 44610-2G080
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000 Toyota Celica | 4 Cyl 1.8L | 1ZZFE, 2ZZGE; ZZT230L-BLMSHA, ZZT230L-BLPSHA, ZZT231L-BLFVFA, ZZT231L-BLPVFA
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Toyota Celica Brake Booster Assembly
Part Number: 44610-2D590
$760.46 MSRP: $1135.47
You Save: $375.01 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Booster Assy, Brake
- Replaced by: 44610-2D140
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1994-1995 Toyota Celica | GT, ST | 4 Cyl 1.8L, 4 Cyl 2.2L | 5SFE, 7AFE; AT200L-BCMSKA, AT200L-BCPSKA, AT200L-BLMSKA, AT200L-BLMSKK, AT200L-BLPSKA, AT200L-BLPSKK, ST204L-BCMGKA, ST204L-BCMGKK, ST204L-BCPGKA, ST204L-BCPGKK, ST204L-BKMGKA, ST204L-BKPGKA, ST204L-BLMGKA, ST204L-BLMGKK, ST204L-BLPGKA, ST204L-BLPGKK
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Toyota Celica Brake Booster Kit
Part Number: 04443-14220
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: JKC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1978-1980 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14221
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: JKC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1979-1981 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14280
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: AISIN
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1978-1980 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14300
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: AISIN
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1979-1981 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14310
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: JKC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1979-1981 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14390
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: AISIN
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1982-1984 Toyota Celica | GT, GTS, ST, Supra | 4 Cyl 2.4L, 6 Cyl 2.8L | 22R, 22REC, 5MGE; MA61L-BLMQFA, MA61L-BLMQFK, MA61L-BLPQFA, MA61L-BLPQFK, RA64L-BCMQEA, RA64L-BCMQEK, RA64L-BCMQSA, RA64L-BCMQSK, RA64L-BCMSEA, RA64L-BCMSSA, RA64L-BCPQEA, RA64L-BCPQEK, RA64L-BCPQSA, RA64L-BCPQSK, RA64L-BCPSEA, RA64L-BCPSSA, RA64L-BLMQEA, RA64L-BLMQEK, RA64L-BLMQSA, RA64L-BLMQSK, RA64L-BLMSSA, RA64L-BLPQEA, RA64L-BLPQEK, RA64L-BLPQSA, RA64L-BLPQSK, RA65L-BCMQEA, RA65L-BCMQEK, RA65L-BCPQEA, RA65L-BKMQEA, RA65L-BKPQEA, RA65L-BLMQEA, RA65L-BLMQEK, RA65L-BLPQEA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14400
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: JKC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1982-1984 Toyota Celica | GT, GTS, ST, Supra | 4 Cyl 2.4L, 6 Cyl 2.8L | 22R, 22REC, 5MGE; MA61L-BLMQFA, MA61L-BLMQFK, MA61L-BLPQFA, MA61L-BLPQFK, RA64L-BCMQEA, RA64L-BCMQEK, RA64L-BCMQSA, RA64L-BCMQSK, RA64L-BCMSEA, RA64L-BCMSSA, RA64L-BCPQEA, RA64L-BCPQEK, RA64L-BCPQSA, RA64L-BCPQSK, RA64L-BCPSEA, RA64L-BCPSSA, RA64L-BLMQEA, RA64L-BLMQEK, RA64L-BLMQSA, RA64L-BLMQSK, RA64L-BLMSSA, RA64L-BLPQEA, RA64L-BLPQEK, RA64L-BLPQSA, RA64L-BLPQSK, RA65L-BCMQEA, RA65L-BCMQEK, RA65L-BCPQEA, RA65L-BKMQEA, RA65L-BKPQEA, RA65L-BLMQEA, RA65L-BLMQEK, RA65L-BLPQEA
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Toyota Celica Brake Booster Kit
Part Number: 04443-14410
Product Specifications
- Other Name: Booster Kit, Brake; Booster Overhaul Kit, Boot
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1982-1985 Toyota Celica | GT, GTS, ST, Supra | 4 Cyl 2.4L, 6 Cyl 2.8L | 22R, 22REC, 5MGE; MA61L-BLMQFA, MA61L-BLMQFK, MA61L-BLPQFA, MA61L-BLPQFK, RA64L-BCMQEA, RA64L-BCMQEK, RA64L-BCMQSA, RA64L-BCMQSK, RA64L-BCMSEA, RA64L-BCMSSA, RA64L-BCPQEA, RA64L-BCPQEK, RA64L-BCPQSA, RA64L-BCPQSK, RA64L-BCPSEA, RA64L-BCPSSA, RA64L-BLMQEA, RA64L-BLMQEK, RA64L-BLMQSA, RA64L-BLMQSK, RA64L-BLMSSA, RA64L-BLPQEA, RA64L-BLPQEK, RA64L-BLPQSA, RA64L-BLPQSK, RA65L-BCMQEA, RA65L-BCMQEK, RA65L-BCPQEA, RA65L-BKMQEA, RA65L-BKPQEA, RA65L-BLMQEA, RA65L-BLMQEK, RA65L-BLPQEA
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Toyota Celica Brake Booster Kit
Part Number: 04443-20320
Product Specifications
- Other Name: Booster Kit, Brake
- Manufacturer Note: AISIN
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1979-1981 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Assembly
Part Number: 44610-14352
Product Specifications
- Other Name: Booster Assy, Brake
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1979-1981 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
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Toyota Celica Brake Booster Assembly
Part Number: 44610-14530
Product Specifications
- Other Name: Booster Assy, Brake
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1979-1981 Toyota Celica | GT, LT, ST, Supra | 4 Cyl 2.2L, 4 Cyl 2.4L, 4 Cyl 2.6L, 6 Cyl 2.8L | 20R, 22R, 4ME, 5ME; MA46L-BLHQEA, MA46L-BLMQEA, MA47L-BLHQEA, MA47L-BLMQEA, RA42L-BCHDSA, RA42L-BCHQSA, RA42L-BCHSSA, RA42L-BCKDSA, RA42L-BCKSSA, RA42L-BCMQSA, RA42L-BCMSSA, RA42L-BLHQSA, RA42L-BLHSSA, RA42L-BLMQSA, RA42L-BLMSSA, RA43L-BCHQSA, RA43L-BCHSSA, RA43L-BCMQSA, RA43L-BCMSSA, RA43L-BLHQSA, RA43L-BLMQSA
View related parts
Toyota Celica Brake Booster Assembly
Part Number: 44610-14560
Product Specifications
- Other Name: Booster Assy, Brake
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1982-1985 Toyota Celica | GT, GTS, ST, Supra | 4 Cyl 2.4L, 6 Cyl 2.8L | 22R, 22REC, 5MGE; MA61L-BLMQFA, MA61L-BLMQFK, MA61L-BLPQFA, MA61L-BLPQFK, RA64L-BCMQEA, RA64L-BCMQEK, RA64L-BCMQSA, RA64L-BCMQSK, RA64L-BCMSEA, RA64L-BCMSSA, RA64L-BCPQEA, RA64L-BCPQEK, RA64L-BCPQSA, RA64L-BCPQSK, RA64L-BCPSEA, RA64L-BCPSSA, RA64L-BLMQEA, RA64L-BLMQEK, RA64L-BLMQSA, RA64L-BLMQSK, RA64L-BLMSSA, RA64L-BLPQEA, RA64L-BLPQEK, RA64L-BLPQSA, RA64L-BLPQSK, RA65L-BCMQEA, RA65L-BCMQEK, RA65L-BCPQEA, RA65L-BKMQEA, RA65L-BKPQEA, RA65L-BLMQEA, RA65L-BLMQEK, RA65L-BLPQEA
View related parts
Toyota Celica Brake Booster Assembly
Part Number: 44610-14580
Product Specifications
- Other Name: Booster Assy, Brake; Brake Booster
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1982-1984 Toyota Celica | GT, GTS, ST, Supra | 4 Cyl 2.4L, 6 Cyl 2.8L | 22R, 22REC, 5MGE; MA61L-BLMQFA, MA61L-BLMQFK, MA61L-BLPQFA, MA61L-BLPQFK, RA64L-BCMQEA, RA64L-BCMQEK, RA64L-BCMQSA, RA64L-BCMQSK, RA64L-BCMSEA, RA64L-BCMSSA, RA64L-BCPQEA, RA64L-BCPQEK, RA64L-BCPQSA, RA64L-BCPQSK, RA64L-BCPSEA, RA64L-BCPSSA, RA64L-BLMQEA, RA64L-BLMQEK, RA64L-BLMQSA, RA64L-BLMQSK, RA64L-BLMSSA, RA64L-BLPQEA, RA64L-BLPQEK, RA64L-BLPQSA, RA64L-BLPQSK, RA65L-BCMQEA, RA65L-BCMQEK, RA65L-BCPQEA, RA65L-BKMQEA, RA65L-BKPQEA, RA65L-BLMQEA, RA65L-BLMQEK, RA65L-BLPQEA
View related parts
Toyota Celica Brake Booster Assembly
Part Number: 44610-14680
Product Specifications
- Other Name: Booster Assy, Brake
- Manufacturer Note: JKC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1983-1985 Toyota Celica | GT, GTS, ST, Supra | 4 Cyl 2.4L, 6 Cyl 2.8L | 22R, 22REC, 5MGE; MA61L-BLMQFA, MA61L-BLMQFK, MA61L-BLPQFA, MA61L-BLPQFK, RA64L-BCMQEA, RA64L-BCMQEK, RA64L-BCMQSA, RA64L-BCMQSK, RA64L-BCMSEA, RA64L-BCMSSA, RA64L-BCPQEA, RA64L-BCPQEK, RA64L-BCPQSA, RA64L-BCPQSK, RA64L-BCPSEA, RA64L-BCPSSA, RA64L-BLMQEA, RA64L-BLMQEK, RA64L-BLMQSA, RA64L-BLMQSK, RA64L-BLMSSA, RA64L-BLPQEA, RA64L-BLPQEK, RA64L-BLPQSA, RA64L-BLPQSK, RA65L-BCMQEA, RA65L-BCMQEK, RA65L-BCPQEA, RA65L-BKMQEA, RA65L-BKPQEA, RA65L-BLMQEA, RA65L-BLMQEK, RA65L-BLPQEA

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Toyota Celica Brake Booster

If you are in demand for superior quality and affordable OEM Toyota Celica Brake Booster, then shop with us! We own a wide range of the reduced-priced genuine Toyota Celica Brake Booster. You can purchase in confidence as all parts come with a manufacturer's warranty. Any issues with our products? No need to worry as we have a hassle-free return policy to guide you every step of the way.

Toyota Celica Brake Booster Parts Questions & Experts Answers

Brake Booster Assembly
44610-20800
Q: How to operate, check, remove, and install a power brake booster on Toyota Celica?
A:
To perform an operating check, depress the brake pedal several times with the engine off, ensuring no change in the pedal reserve distance. Start the engine while depressing the pedal; a slight drop indicates normal operation. For an airtightness check, start the engine and turn it off after one or two minutes, then slowly depress the brake pedal several times; if the pedal depresses less each time, the booster is airtight. While the engine runs, depress the brake pedal, then stop the engine with the pedal held down; if there's no change in pedal reserve travel after 30 seconds, the booster is airtight. Power brake booster units should not be disassembled due to their complexity and critical role in brake performance; they should be replaced with new or rebuilt units. To remove the booster, first remove the Brake Master Cylinder, then take out the left side under-dash panel to access the pushrod clevis connecting the booster to the brake pedal. Remove the clevis pin retaining clip and pull out the pin, then unscrew the locknut to loosen the clevis. Disconnect the hose from the engine to the booster, taking care not to damage it, and remove the four nuts and washers securing the brake booster to the firewall. Slide the booster straight out until the studs clear the holes. For installation, follow the reverse of removal, tightening the clevis locknut and booster mounting nuts to the specified torque. If replacing the power booster unit, measure and adjust the clearance between the master cylinder piston and the pushrod in the vacuum booster as necessary, ensuring no clearance or interference exists. Finally, after installing the master cylinder and brake hoses, adjust the brake pedal height and freeplay, and bleed the system.