Rear pads gone after 1 month since replacement
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C230K
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From: Colorado
G550
The pads are supposed to float on the caliper hangers where they mount. If one or both were binding up, the caliper would assert them against the rotor, but they wouldn't release, remaining in contact. And every braking action would ensure they would remain lodged. (My guess, anyway.)
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Exactly. The pads are mirrors but for the hole. In my 350 the rear has not even had a sensor for about a year (I am replacing the sensor harness when I get the desire). That alone, with physics and what not - can not comprehend how that would alter brake wear. We can see factually they are mirror images in my photo from FCP. I still think that is a snake oil excuse.
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
Manufacturer is R1 Concepts. I have reached out to them to let them know about this and to request clearer indicators on pad orientation be printed on the pads to prevent other installers from repeating history.
I am replacing the pads with PosiQuiet ceramics, which my 2009 E350 has and I swear by them.
I am replacing the pads with PosiQuiet ceramics, which my 2009 E350 has and I swear by them.
Last edited by Uranium238; Mar 3, 2026 at 03:28 PM.
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
Shop will refund parts and half of labor charged (install). Absolutely no confidence in these guys. Doesn't sound like they want the car back (said they have no time this week to take it apart again.)
I'm going to examine this myself, take pictures and send them the bill if I see further damage. It's a slide caliper, nothing complex about it. I bet the float pins were never even removed and greased and the caliper slides are binding with the pad to prevent movement on both sides due to pad installation gone wrong.
I don't think it's possible both rear calipers would fail at the same time. I can also put the parking brake into the retract position for service. The noise can be hearbefor the retraction.
I'm going to examine this myself, take pictures and send them the bill if I see further damage. It's a slide caliper, nothing complex about it. I bet the float pins were never even removed and greased and the caliper slides are binding with the pad to prevent movement on both sides due to pad installation gone wrong.
I don't think it's possible both rear calipers would fail at the same time. I can also put the parking brake into the retract position for service. The noise can be hearbefor the retraction.
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
Shop refunded the work on the rears.
For abnormal pad wear to happen in the rear like this:
- The pad the sensor seats in jams the caliper bracket due to the height of the tabs and sensor installed on the pad, preventing proper float.
- There is no release of tension off the piston once the brake pedal is lifted and the outer pad is jammed against the rotor due to improper installation.
- The disc overheats and could effectively be compromised.
In short, make sure the pads with the sensor are installed on the piston side of the caliper, and your caliper pins have more lube than an a first time Onlyfans performer for proper sliding.
For abnormal pad wear to happen in the rear like this:
- The pad the sensor seats in jams the caliper bracket due to the height of the tabs and sensor installed on the pad, preventing proper float.
- There is no release of tension off the piston once the brake pedal is lifted and the outer pad is jammed against the rotor due to improper installation.
- The disc overheats and could effectively be compromised.
In short, make sure the pads with the sensor are installed on the piston side of the caliper, and your caliper pins have more lube than an a first time Onlyfans performer for proper sliding.
