Ever heard antilock brake system make a 4-pulse noise like "urk urk urk urk" that you can feel a little in pedal? I'd like to attach a short & small 4MB video I made but don't know where to put it, lol. It only does it at first press of pedal, about 1/2 second after it's depressed...and every time.

I don't have a brake light on now but sometimes the antilock dummy light will come on and off, or stay for a while.

I don't care if the antilocks don't work because I like all manual old school operation anyway. I know how to drive, lol. But I do want the brakes to always work of course!

It brakes good, straight, quiet and evenly. Fluid is full and doesn't leak out. Seems clean.

Any guesses? Maybe ABS Booster that runs on vacuum...thus the short delay?

There is a small wire on top of the intake plenum that isn't plugged in, but there isn't a male plug anywhere for it to mate with. Took pic of it, but again where do I post pic or video for this site?

 

Use the "Go Advanced" tab then select manage attachments to attach files. Observe file size limits.

 

Most likely it is a failed brake booster accumulator. That will cause the noises when brake pedal applied. Do a quick search on the Montero thread for Brake Booster Accumulator or BBA. I recall there was a thread dealing with this some time ago.

 

I discovered the noise is the nitrogen filled Brake Accumulator. According to Mitsubishi HQ it's a non-essential part that imposes no safety problems and only symptom is the chirping "urk urk urk urk" noise and MAYBE a firmer than usual pedal sometimes (but I've not noticed that yet).

It IS NOT a "recall" but only a warranty extension for 10 years or 100,000 miles, which ever is first.

So I'm glad. Anything that doesn't require a fix is welcomed!

 

I replaced mine and the difference in braking power is really noticeable, just remember is a brake booster. There is no need to bleed or reset anything. Genuine Mitsubishi 2002 2006 Montero Hydraulic Brake Accumulator 4630A011 | eBay