Blue sensor on front brake

Pweb2203

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Hi all

Had loud squealing and loud clang from front wheel last night. Assuming just a stone caught between disk and guard. However I noted that there is a blue sensor one driver side front brake only. What is it and is it correct that only on one front wheel?

just interested

thanks
 

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Wighty

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Hi all

Had loud squealing and loud clang from front wheel last night. Assuming just a stone caught between disk and guard. However I noted that there is a blue sensor one driver side front brake only. What is it and is it correct that only on one front wheel?

just interested

thanks
Brake wear sensor , yes it’s often only in one wheel . May be an aftermarket if it’s blue ?
(Although on a 2019 car I doubt it’s aftermarket )
 
OP
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Pweb2203

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Thanks for the quick reply.
 

star

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Lots of different brakes sensors, blue is one of them.
 

EmilysDad

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And opposite sides front & rear on my R Class .... no idea with my ML .... never looked :rolleyes:
 

onefortheroad

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Me -2019 GLC 350 coupe AMG line. Mrs- ford kuga 65 plate awd powershift .
My 04 e320 had sensors on both fronts and only 1 on the rear . Is that classed as triangulation?
 

EmilysDad

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My 04 e320 had sensors on both fronts and only 1 on the rear . Is that classed as triangulation?
I suppose if manufactures can save a quid here & there they will. My Omega had 2 sensors at the front (none at the back) but they dropped a sensor on later cars. Better set up too .... the sensor we t open circuit rather than to ground & only reminded you each ignition start .... not every bl33ding time you pressed the pedal
 

pgh13

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I was surprised on W211 to find the left and right front have different shaped connectors.
Why stock one part when you can stock two?
 

Cole@MBS

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I was surprised on W211 to find the left and right front have different shaped connectors.
Why stock one part when you can stock two?
That’s cause the near side is a 50% wear sensor So the hole in the pad is different to the O/S
 


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