We'd like to remind Forumites to please avoid political debate on the Forum... Read More »
The Forum is currently experiencing technical issues which the team are working to resolve. Thank you for your patience.
is the brake pad wear indicator an MOT failure?

thegentleway
Posts: 1,082 Forumite

in Motoring
is the brake pad wear indicator an MOT failure?
No one has ever become poor by giving
0
Comments
-
No, an illuminated brake pad wear indicator is not a reason for failure.(1.1.13. Brake linings and pads)However, brake pads worn down to the wear indicators are a major, and worn to less than 1.5mm are a dangerous, both are failures.Presumably if the light is on due to a fault or a broken wire, it is a pass, if it is on due to wear, a fail.
I want to go back to The Olden Days, when every single thing that I can think of was better.....
(except air quality and Medical Science)
1 -
Get them replaced or you'll end up needing discs too.4.29kWp Solar system, 45/55 South/West split in cloudy rainy Cumbria.1
-
Ok for mot, but sensor will be quite an added cost when replacing brake pads.
£20-£30 for wear indicator if your lucky.
To avoid this I ordered one of these, it also stops dodgy garages telling you need brakes when you don’t.
https://www.amazon.co.uk/gp/product/B01LYZZR2J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I had 8mm left when they told me mine needed replacement. Only 1/3 worn.0 -
Am I missing something here…I’m sure that any light on the dash is an mot fail, or do you mean the wear at the pad that hasn’t yet caused the light on the dash to illuminate?0
-
Bigwheels1111 said:Ok for mot, but sensor will be quite an added cost when replacing brake pads.
£20-£30 for wear indicator if your lucky.
To avoid this I ordered one of these, it also stops dodgy garages telling you need brakes when you don’t.
https://www.amazon.co.uk/gp/product/B01LYZZR2J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I had 8mm left when they told me mine needed replacement. Only 1/3 worn.0 -
Alanp said:Am I missing something here…I’m sure that any light on the dash is an mot fail, or do you mean the wear at the pad that hasn’t yet caused the light on the dash to illuminate?https://www.gov.uk/guidance/mot-inspection-manual-for-private-passenger-and-light-commercial-vehicles
1.1.13. Brake linings and pads
Some brake pads have metal wear indicators so that when the pads become excessively worn the metal indicator touches the disc making a squealing sound. Other pads may have a cut, which if worn away indicates that the pad must be replaced.
An illuminated brake wear indicator is not a reason for failure.
Defect Category (a) Brake lining or pad:
(i) worn down to wear indicator
(ii) worn below 1.5mm
Major
Dangerous(b) Brake lining or pad contaminated with oil, grease etc. Major (c) Brake lining or pad missing or incorrectly mounted Dangerous
I want to go back to The Olden Days, when every single thing that I can think of was better.....
(except air quality and Medical Science)
1 -
400ixl said:Bigwheels1111 said:Ok for mot, but sensor will be quite an added cost when replacing brake pads.
£20-£30 for wear indicator if your lucky.
To avoid this I ordered one of these, it also stops dodgy garages telling you need brakes when you don’t.
https://www.amazon.co.uk/gp/product/B01LYZZR2J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I had 8mm left when they told me mine needed replacement. Only 1/3 worn.
Wear down with the pads and puts the light on,
Once they set the light off they need replacement.
Had them on my Vectra, £20 each side.1 -
Thank you @facade - that's very helpful.Bigwheels1111 said:400ixl said:Bigwheels1111 said:Ok for mot, but sensor will be quite an added cost when replacing brake pads.
£20-£30 for wear indicator if your lucky.
To avoid this I ordered one of these, it also stops dodgy garages telling you need brakes when you don’t.
https://www.amazon.co.uk/gp/product/B01LYZZR2J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I had 8mm left when they told me mine needed replacement. Only 1/3 worn.
Wear down with the pads and puts the light on,
Once they set the light off they need replacement.
Had them on my Vectra, £20 each side.No one has ever become poor by giving0 -
thegentleway said:Thank you @facade - that's very helpful.Exactly, except I don't replace the sensors to save money. I shorted the wires togethers the first time I change the pads and discs so the light wouldn't be on. Presumably the wires have corroded and the light is back on just when the MOT is due and I don't have access to my tools!In The Olden Days there was a sensor wire "chain" round the 4 wheels. The sensors were a piece of bare wire embedded in the pad that had 2 connections to join the chain together. At the end of the chain was the handbrake switch (via a diode). with the handbrake on the pad wear lamp lights up as a test. If any of the pads wear, the sensor wire shorts to the disc and puts the pad wear light on. If a sensor wasn't connected. the light wouldn't come on with the handbrake. (so we used to cut the wires off the old pads and just connect them to maintain the chain to fit the half price pads)No doubt nowadays the ecu senses if the circuit is open (sensor disconnected), or shorted to earth (pad worn), but I'd still be looking for a short to earth at the sensor wires first.
I want to go back to The Olden Days, when every single thing that I can think of was better.....
(except air quality and Medical Science)
0 -
Bigwheels1111 said:400ixl said:Bigwheels1111 said:Ok for mot, but sensor will be quite an added cost when replacing brake pads.
£20-£30 for wear indicator if your lucky.
To avoid this I ordered one of these, it also stops dodgy garages telling you need brakes when you don’t.
https://www.amazon.co.uk/gp/product/B01LYZZR2J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I had 8mm left when they told me mine needed replacement. Only 1/3 worn.
Wear down with the pads and puts the light on,
Once they set the light off they need replacement.
Had them on my Vectra, £20 each side.
It would potentially have a wire which connects to the pad which is used to connect to the pad, but that doesn't need changing when the pad wears, just re-connecting to the new pad. Only time it would need replacing would be if it was physically damaged which would not be caused by the pads wearing.
0
Confirm your email address to Create Threads and Reply

Categories
- All Categories
- 350K Banking & Borrowing
- 252.7K Reduce Debt & Boost Income
- 453.1K Spending & Discounts
- 242.9K Work, Benefits & Business
- 619.8K Mortgages, Homes & Bills
- 176.4K Life & Family
- 255.9K Travel & Transport
- 1.5M Hobbies & Leisure
- 16.1K Discuss & Feedback
- 15.1K Coronavirus Support Boards