How to perform an operating check on the power brake booster?

To perform an operating check on the power brake booster, begin by depressing the brake pedal multiple times with the engine off to ensure there is no change in the pedal reserve distance. Then, depress the pedal and start the engine to see if it goes down slightly, indicating normal operation. To check air tightness, turn the engine on and off. Depress the brake pedal and check if it lowers farther the first time but gradually rises after the second or third time.

Genuine Chevrolet Cobalt Brake Booster

Brake Power Booster

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3 Brake Boosters found

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Chevrolet Cobalt Power Brake Booster ASSEMBLY
Part Number: 20852777
- Other Name: Booster Assembly, Power Brake; Booster, Brake Booster
- Replaces: 25991525
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Fits the following Vehicles:
2009-2010 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L
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View related parts
Chevrolet Cobalt Power Brake Booster ASSEMBLY
Part Number: 20852776
- Other Name: Booster Assembly, Power Brake ; Booster, Hydraulic Power Brake Booster; Booster, Brake Booster
- Replaces: 25820076
More Info
Fits the following Vehicles:
2008-2010 Chevrolet Cobalt | LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR | 4 Cyl 2.0L, 4 Cyl 2.2L, 4 Cyl 2.4L
Less Info
View related parts
Chevrolet Cobalt Power Brake Booster ASSEMBLY
Part Number: 15261541
- Other Name: Booster Assembly, Power Brake ; Booster, Hydraulic Power Brake Booster; Booster, Brake Booster
- Replaces: 22715702
More Info
Fits the following Vehicles:
2005-2008 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.0L, 4 Cyl 2.2L, 4 Cyl 2.4L
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Chevrolet Cobalt Brake Booster Parts Questions & Answers

Power Brake Booster ASSEMBLY
20852776
Q: How to perform an operating check on the power brake booster?
A: To perform an operating check on the power brake booster, begin by depressing the brake pedal multiple times with the engine off to ensure there is no change in the pedal reserve distance. Then, depress the pedal and start the engine to see if it goes down slightly, indicating normal operation. To check air tightness, turn the engine on and off. Depress the brake pedal and check if it lowers farther the first time but gradually rises after the second or third time.