After driving for 20 minutes or so, the brake pedal will “surge” and or “pulse” only when the vehicle is at a complete stop. It sounds and feels like the ABS is activated. It does not matter how hard the pedal is pressed. Standing over the open hood, it sounds like the ABS “pump” is activated (front driver side of engine bay).
The ABS warning light is not activated on the dash. The brake warning light is not on.
I took the car into local independent BMW specialist. He indicated he could not plug into the ABS to pull codes. He noted the front ABS sensors were making contact with the front tires. He thought this could be the cause of the issue, but strongly cautioned he was guessing. I was quoted $588 to replace both sensors, which seemed high for a guess.
(1) any thoughts on the exact nature of the issue? Any other diagnostics I can do to help narrow it down?
(2) how difficult is it to replace the ABS sensors on the front wheels? The Bentley is strangely silent when it comes to ABS.
The ABS warning light is not activated on the dash. The brake warning light is not on.
I took the car into local independent BMW specialist. He indicated he could not plug into the ABS to pull codes. He noted the front ABS sensors were making contact with the front tires. He thought this could be the cause of the issue, but strongly cautioned he was guessing. I was quoted $588 to replace both sensors, which seemed high for a guess.
(1) any thoughts on the exact nature of the issue? Any other diagnostics I can do to help narrow it down?
(2) how difficult is it to replace the ABS sensors on the front wheels? The Bentley is strangely silent when it comes to ABS.
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