Used Brake Booster
Request a VIN-matched quote for a used Brake Booster. Availability, condition, warranty, and shipping are confirmed for your exact vehicle before purchase.
- ✔ Used-part options
- ✔ Add your VIN for fitment review
- ✔ Review warranty terms in the quote
- ✔ Confirm payment method before purchase
Part Details
Your quote request is reviewed against your vehicle details. Before buying, ask for the condition description, mileage when relevant, warranty terms, shipping cost, and final price so you can compare the available options.
Quote status: Live stock and public prices are not displayed. Request a vehicle-specific quote to review the available option and its final terms.
Compatibility: Multiple makes & models
Condition & Quality Standards
Condition grading and inspection practices vary by part and source. Before purchase, request the available condition description, mileage information when relevant, photos, and any inspection or test notes.
About This Brake Booster
The brake booster multiplies the force from your foot before it reaches the master cylinder, and three technologies share the name without interchanging. A vacuum booster runs on manifold vacuum; because turbocharging and direct injection cut available vacuum, many such vehicles add an electric vacuum pump. A hydro-boost uses power-steering pump pressure instead, which suits diesels and heavy trucks where usable vacuum is scarce, and it carries a high-pressure accumulator holding enough energy for several assisted stops if the belt breaks. Hybrids and EVs typically use a vacuum-independent electromechanical booster such as Bosch's iBooster, where an electric motor and gear unit generate boost and let the car blend regenerative braking. Confirm the booster is the fault first: it gives a hard, high-effort pedal, while a pedal that slowly sinks under steady pressure points at the master cylinder. Have a licensed mechanic diagnose, install and bleed it.
Want the full picture before you buy? Read our bad brake booster symptoms guide.
Before you order, it helps to read:
Common Signs Your Brake Booster May Need Replacing
- A hard, high-effort pedal, immediately or after one or two applications
- A hiss from under the dash when the pedal is pressed
- Longer stopping distances for the same pedal effort
- The engine stumbling or stalling as you press the brake
- Brakes dragging or the car feeling held back
- On hydro-boost, power-steering whine or heavy steering with poor assist
Symptoms vary by vehicle and driving conditions. Always confirm diagnosis before replacement.
What to Check When Buying a Used Brake Booster
- Have a shop confirm it is the booster, not the master cylinder, a hose or low vacuum
- Identify the type - vacuum, hydro-boost, or electromechanical as used on hybrids and EVs
- Match by VIN: stud pattern, body size, pushrod geometry and the master cylinder it pairs with
- On hydro-boost, only a professional should discharge the high-pressure accumulator
- Ask whether yours is integrated with the ABS or brake actuator assembly - that needs scan-tool bleeding
- Book a licensed mechanic for installation and a full brake bleed - not a DIY job
Ask for these details and any available photos before approving a purchase.
What Happens After You Request a Quote
- We review your vehicle and part request
- Provide your VIN or full vehicle details for fitment review
- Review the available condition, warranty, shipping, and price details
- You decide — no obligation to buy
Response time depends on the part, vehicle information supplied, and current sourcing options.
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Availability & Quote Details
- Live stock and public pricing are not displayed for this Brake Booster
- Available condition, fitment, warranty, shipping, and final pricing are confirmed only after we review your request
- Ask for warranty and return terms in writing before you buy
- Shipping options are confirmed for the destination and part size
Check Current Availability
We do not display unverified stock records. Send your VIN or year, make, model, and original part number so a specialist can confirm exact fitment and the options currently available.
How Pricing Is Determined
Pricing for used brake booster depends on several factors:
- Vehicle year, make, model, and engine configuration
- Mileage and overall condition of the donor vehicle
- Supplier location and shipping distance
- Warranty coverage offered
Type is the biggest factor: a plain vacuum booster, a hydro-boost unit with its accumulator and hydraulic ports, and an electromechanical booster for a hybrid or EV are entirely different parts. A quote then reflects whether the master cylinder comes attached, whether the unit is part of an integrated ABS assembly, what hardware is included, and freight. Budget separately for diagnosis and installation. We do not display prices - request a quote and review the written terms first.
Confirm the final price and fitment basis before approving a purchase.
Frequently Asked Questions
Why is my brake pedal suddenly hard to push?
The assist is missing. On a vacuum system that can be a leaking diaphragm, a failed check valve, a collapsed hose, or not enough engine vacuum - a pedal that feels hard immediately, or after one application, is a recognized sign of a vacuum leak or low vacuum.
Is it the brake booster or the master cylinder?
They fail in opposite directions. A failing booster leaves a hard, high-effort pedal: assist is gone but the hydraulics still work. A failing master cylinder gives a soft pedal, or one that slowly sinks under steady pressure, as internal seals let fluid bypass.
Vacuum, hydro-boost or electric - which do I have?
Look at what feeds it. A vacuum booster is a round canister on the firewall with a hose to the intake manifold or an electric vacuum pump. A hydro-boost has hydraulic lines, plumbed in with the steering gear. Hybrids and EVs use an electromechanical booster with a wiring connector.
Can I fit a brake booster myself?
No. Pushrod clearance between booster and master cylinder must be set correctly - too long and the brakes drag - and the system must be properly bled. Hydro-boost units store dangerously high pressure in an accumulator that must be discharged first, and integrated ABS assemblies need a scan tool to bleed.
Should I worry about brake fluid stains on a used booster?
Yes - treat them as a reject signal. NAPA is blunt that you should never have brake fluid on or inside a power brake booster, and that signs of fluid mean the master cylinder has a leak which will likely damage the booster. Ask the yard for photos of the master cylinder mounting face, and have the leaking cylinder dealt with in the same job so the replacement is not soaked too.
Does the power steering system need flushing when a hydro-boost is replaced?
Yes, and skipping it is how the replacement dies. CARDONE's hydro-boost procedure calls for flushing the entire power steering system with the manufacturer's fluid, new seals at every disconnected fitting, an in-line power steering filter, and replacing rubber hoses over four years old. Contamination left in the system shows up as a pedal that stays down.
My turbo engine has an electric vacuum pump - is the hard pedal the pump or the booster?
It can easily be the pump or its circuit. GM's recall bulletin for the 1.4L turbo Cruze states that engine and transmission combination needs supplemental vacuum from an electric pump, and that without it brake assist may be intermittently reduced or lost, needing extra pedal force or a longer stop. CARDONE puts normal booster supply at 18 to 21 inches of vacuum, so have supply measured first.
Is the check valve part of a used brake booster, or do I move mine over?
It varies, so get it stated on the quote - it is a small part with a big symptom. CARDONE says a vacuum booster uses a one-way check valve designed not to let air escape the booster, and that a faulty check valve can lead to a hard brake pedal. Supply hoses also go brittle and crack, or soften and collapse, cutting vacuum. Replace a suspect valve or hose with the booster.
How is compatibility verified?
Provide your VIN or full vehicle details so you can review the fitment basis in your quote before approving a purchase.
What if the part does not fit?
Most suppliers offer limited return or exchange options. Warranty and return terms are confirmed before purchase.
How long does shipping take?
Shipping time varies by location, part size, and freight arrangement. Confirm the dispatch and delivery estimate in your quote.
