Blue sensor on front brake

[Pweb2203]

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

 

[Wighty]

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 )

 

[Pweb2203]

Thanks for the quick reply.

 

[John Laidlaw]

yup only one side...

 

[star]

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

 

[EmilysDad]

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

 

[John Laidlaw]

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

usually diagonal, thinks it's all Mercs.....?

 

[EmilysDad]

..., thinks it's all Mercs.....?

Pass .... ???

 

[Wighty]

yup only one side...

User pic change ALERT !!

 

[onefortheroad]

My 04 e320 had sensors on both fronts and only 1 on the rear . Is that classed as triangulation?

 

[EmilysDad]

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

 

[John Laidlaw]

User pic change ALERT !!

Keeps everyone on their toes Wighty!

 

[Wighty]

Keeps everyone on their toes Wighty!

Welcome New Guy

 

[pgh13]

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]

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