ABS Modulator May Leak Air and Cause Low Brake Pedal on Honda Accord

Problem Description and Possible Solution

The ABS modulator (hydraulic unit) can leak air into the brake system and cause a low brake pedal. A new ABS modulator will be needed if it is diagnosed to be the source of the leak.

Problem Data
RepairPal Verified
Average mileage: 88,954 (4,800–300,000)
11 model years affected: 1994, 1995, 2003, 2004, more2005, 2006, 2007, 2008, 2009, 2010, 2014
27 people reported this problem
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Viewing 1 - 13 of 13 comments
mushy brakes have replaced master cylinder and brakes still mushy
Air noise coming from break pedal the pedal will sink to the floor
abs light and brake light on , I just bought the car from auction , where should I start checking
Peddle got soft 3 different times. Went almost to floor last time. super dangerous situation. After Honda giving me the run around they finally realized there was a big problem. Air in system. Replaced ABS system and that fixed it.
i had the brakes redone and the brakes feel mushy like they still need to be bled but they dont.
Brakes failed at stop sign. Fender bender car in front of me.
Ticketed for accident. Next day, dealer found air in ABS Modulator.
Cost of repair: $1,400. Two days to repair due to part having to be
flown in from California. Honda refuses to acknowledge low milage
rule and said warranty expired. Thank you Honda.. :(
ABS, VHS and Brake light turn on continuosly. ABS modulator replacement.
Brake pedal would not depress and would not stop the car. Had it "fixed" for $454. A month later it did the same thing coming up to a stop sign. Could not stop the car, resulted in an accident (fortunately with no one hurt).
Low pedal after new rotors, pads and master cylinder replacement and many bleeds. Diagnostics said ABS modulator was cause. List price S1074.68.
When having my tires rotated as a part a of routine maintenance, the mechanic discovered that the caliper on the right front brake had frozen, making the brake inoperable. I took the car to the dealer and during the course of repairing the brake assembly, the mechanic discovered that my car had no brake fluid. This was after I had an oil change and all fluids checked several days earlier. They told me that the the ABS module had failed. Fortunately, the car was just barely under warranty, as the cost of the part alone was $1000.00. I have had positive experiences with Honda automobiles before, so this was a bit of a shock. I drive on a busy expressway during my daily commute, so I found the prospect of catastrophic brake system failure unnerving! I will probably trade this vehicle at the first opportunity; not sure if it will be for another Honda.
Brake activation occurs when pedal is 1/2 way to the floor. Replaced rear pads and bled fluid at all 4 wheels FL, FR, LR, and then RR. No difference in brake pedal travel. I suspect air in ABS module. 2004 ABS module is non serviceable as far as I can tell.
wanted to replace the module at a cost of $1200.00 plus $200.00 labor. Traded Honda on a Toyota Rav4...
contamination in master cylinder and poor braking.