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Brake system bleeding removes air bubbles trapped in the hydraulic system, which is what makes a brake pedal feel spongy. Route 66 Auto Repair in Upland bleeds brakes after line, caliper or master cylinder work, and for drivers whose pedal went soft after a home repair. Air compresses and fluid does not, so even a small bubble costs you pedal travel. Our technicians use a scan tool to cycle the ABS unit when your vehicle needs it.
How do you know there is air in your brakes?
- A soft, springy pedal that firms up when you pump it
- Pedal travel that grew right after brake work
- A pedal that sinks further than it used to before the brakes bite
- Bubbles in fluid from a bleeder screw
- The reservoir was allowed to run dry
Why is air in the ABS unit harder to remove?
ABS (anti-lock brakes) uses a pump and a block of small valves that stay closed during normal driving. Air trapped inside that block will not move with a simple two-person bleed. It can sit there until the ABS activates on a sudden stop, then move into the lines and soften the pedal.
Many vehicles need a scan tool to run the ABS pump and open those valves during bleeding. We do this when the service procedure calls for it, then bleed the wheels again to catch what came out.
Our brake bleeding process
Step 1: Find why air got in
We check for leaks and the recent repair history, since air always has an entry point.
Step 2: Bleed in sequence
Each wheel is bled in the order your vehicle's procedure lists, usually farthest from the master cylinder first.
Step 3: Cycle the ABS
Where required, a scan tool runs the ABS pump and valves, and the wheels are bled again.
Step 4: Confirm firm pedal
We check pedal height and firmness with the engine running, then road-test.
What's included in brake bleeding
Included on the work order
- 01Leak check to find the source of air
- 02Bleed of all four wheels in the specified order
- 03Scan tool ABS cycle when the vehicle requires it
- 04Fresh fluid to replace what was bled out
- 05Pedal height and feel check
- 06Road test including a firm stop
Need-now or need-later?
Need now: call
- A soft pedal that reaches close to the floor
- Air introduced by a recent repair or a dry reservoir
Need later: book
- A slightly soft pedal on older fluid, handled with a scheduled brake fluid flush
- Pedal feel you would like improved with no loss of stopping
How pricing and timing work
A basic bleed is a short job. ABS cycling, seized bleeder screws, or a pedal that stays soft after bleeding add time. A soft pedal after a proper bleed can point to a master cylinder or flexing hose, and we call before testing further. AAA members get 10% off parts and labor, up to $75. Most bleeds are done the same day when the board allows.
Aftercare
The pedal should stay firm. If it softens again within days, air is still getting in from somewhere, and that visit goes to the front of the line. For a routine check of the whole system, ask about a brake system inspection.
Frequently asked questions
I replaced my own brakes and now the pedal is soft. Can you help?
Yes. That is common, especially if a caliper was disconnected or the reservoir ran low. We check your work for leaks, bleed the system correctly, and let you know if anything else needs attention.
What is the difference between bleeding and flushing?
Bleeding removes air and uses only as much fluid as needed. Flushing replaces all of the fluid. Both open the same bleeder screws, but the goal is different.
Why pump the pedal to make it firm?
Pumping pushes more fluid into the calipers and squeezes bubbles smaller for a moment. It masks the problem. A properly bled system is firm on the first press.