Issues with EPB Fault After Rear Brake Pad Replacement at Independent Garage

[matt1979]

We will definitely, thanks a million Fred and I found the other thread about this topic which is near on identical. Thanks again appreciate it

 

[Rob24]

Issues with EPB Fault After Rear Brake Pad Replacement at Independent Garage

Hi everyone, I recently took my car to an independent garage to have my rear brake pads replaced. Unfortunately, when the technician started the job, he realized that the brake pads they had in stock were not the correct ones. He put everything back together, but when he switched the car on...

www.mgevs.com

I think it was this thread

 

[Alb]

I've merged the two threads together so all the conversation can be in the same place

 

[matt1979]

Super thanks Alb

 

[matt1979]

Just a follow up from this MG got the EPB working today - so story goes I got the discs and pads replaced last September from MG / OEM parts. This year N Tyres told me from an MOT test with no picture evidence at the time that one side of the brake discs were worn. We don't drive the car excessively or use it for miles on end. I asked for the pads to be given back from N Tyres and this is what they gave. Does this look right or even possible the pictures attached, as no expert but looks odd.

 

[fred12345]

Just a follow up from this MG got the EPB working today - so story goes I got the discs and pads replaced last September from MG / OEM parts. This year N Tyres told me from an MOT test with no picture evidence at the time that one side of the brake discs were worn. We don't drive the car excessively or use it for miles on end. I asked for the pads to be given back from N Tyres and this is what they gave. Does this look right or even possible the pictures attached, as no expert but looks odd.

First - Thanks for update - unlike many that post their problem and never bother to enlighten us with the solution...

I don't know anything about it but whilst the car is new(ish), I will always take it to MG garage as they should (hopefully) know whet they are doing ... not worth risking it to save a few quid ...

(quote from one brake pads manufacturer):

There are a few potential causes for this problem, which we will discuss in this post. By understanding the causes, you can help to prevent uneven brake pad wear and extend the life of your new pads. Here are the top 5 causes of brake pads wearing unevenly.

Misalignment​

Have you ever noticed that your brake pads seem to be wearing unevenly? Well, there is a good chance that your car is out of alignment. Misalignment is the most common cause of uneven brake pad wear. Misalignment can cause all sorts of problems, and uneven brake pad wear is just one of them.


Misalignment makes the front wheels pull to one side or the other when braking and can result in uneven wear on the pads. This is because if one tire wears faster than the other, your vehicle will not turn properly, which causes more friction on that side of your brakes. The result is a squealing noise and an unbalanced feel while driving.

Slide Pins​

The slide pins that keep your brakes and wheels connected can become corroded, preventing the caliper from moving back and forth with each revolution of tires on rims. You will notice a decrease in stopping power as this happens; if it lasts long enough for pads to wear down too much, there could be a problem! We suggest using a wire brush (or rag) to clean the issue before applying grease. After cleaning, make sure not to overspray any important areas where rust may begin to build again.

Sticky Caliper Pistons​

Debris or rust on one or more pistons can cause sticky brake calipers. To put it another way, if the piston does not slide smoothly, the brake pad will become stuck to the rotor. It is common for a caliper that is jammed to wear down the brake pads more quickly.


One of the most common reasons for uneven brake pad wear is a problem with the caliper. Pressure to the piston is either not being applied or isn't being released properly when a caliper fails to engage.


Another issue that can come up is when the piston is being ejected, but it refuses to return. A damaged seal or piston, or corrosion on the piston that has caused it to bind against the internal cylinder, is the cause of either of these symptoms. If this is the case, you can hone the cylinder; clean or replace the piston; and replace the seal to fix it. It's called rebuilding the caliper, and it's an easy and inexpensive way to fix uneven brake wear on a car. However, if you don't have the right equipment or knowledge, this can take a long time.


The simplest solution is to replace the caliper, which can be more expensive. If you bring your old caliper back to the store for a core charge, you can usually save some money on your new brake caliper.

Caliper Failure​

If you have ever noticed your car's brake pads wearing unevenly, it could be because of a caliper failure. Brake pads are designed to wear down evenly so they can provide even braking pressure for the driver.


Uneven pad wear may develop if there is any metal-on-metal contact in the brake system, resulting in a costly repair bill. Luckily, with proper maintenance, it is possible to avoid this problem!


Regular inspections at a reputable repair provider, who will check your brakes for faults or warning indications before they become significant problems, are one approach to avoiding potential caliper failures. Another option would be inspecting them yourself if you feel comfortable doing so, but make sure you know what you are looking for.

Rotor Thickness Variation​

Did you know that the thicknesses of your brake rotors can have a significant impact on how fast your brake pads wear out? Brake pad manufacturers design their products to last up to about 20,000 miles. However, if the rotor thickness is uneven, it will be more difficult for them to wear evenly and will wear out much sooner. This means that you could end up replacing your brake pads every 10,000 to 15,000 miles if you're unlucky enough to have uneven rotors.

 

[Wazzmania]

Try this chaps I've tried it on my ZS and I think it works . My car rolls with the ignition off and you can hear the motors moving for longer than is normal.

1. Turn on Ignition: Without starting the engine, turn on the ignition.
2. Release Electronic Parking Brake (EPB): Press and hold the brake pedal, then release the EPB by pressing the EPB switch down.
3. Service Mode Activation: Pull and hold the EPB switch up while turning off the ignition. Continue holding the switch for about 5 seconds.
4. Confirmation: The EPB will enter service mode, allowing you to change the brake pads.

How would you "exit" from service mode? Presumably by just switching the car on as normal post repair?

 

[nexia201]

Just a follow up from this MG got the EPB working today - so story goes I got the discs and pads replaced last September from MG / OEM parts. This year N Tyres told me from an MOT test with no picture evidence at the time that one side of the brake discs were worn. We don't drive the car excessively or use it for miles on end. I asked for the pads to be given back from N Tyres and this is what they gave. Does this look right or even possible the pictures attached, as no expert but looks odd.

After how many miles were your discs and pads replaced? I am at 80k miles and they all still seem half way worn . My discs are as they were when they were brand new no wear at all on them.

 

[Lovemyev]

If you are a low mileage user case, then the disc and pads are likely to be replaced due to pitting and corrosion cause by the lack of use, not due to any wear present TBH.
Higher user cases, will not suffer from the issue as the discs and pads are in regular use.
It is very possible that the pads could outlast the life of car in terms of wear rate.

 

[nexia201]

If you are a low mileage user case, then the disc and pads are likely to be replaced due to pitting and corrosion cause by the lack of use, not due to any wear present TBH.
Higher user cases, will not suffer from the issue as the discs and pads are in regular use.
It is very possible that the pads could outlast the life of car in terms of wear rate.

No outlast the car maybe not but i guess they would go past the 100,000 mile easy