Hi All,

 

2002 (52) Fabia 1.4 mpi

I know this has probably been discussed before, but I can't find a specific thread for my issue.

A short while back my car developed a braking fault. When you pressed the brake pedal it felt as if there was nothing there. the brake pedal was firm, but the car would not stop (had to pull on the hand brake to stop). The ABS light was NOT on, but it felt like the ABS was holding the brake force back, as if a wheel was permanently locked. 

On inspection I found the drivers side wheel bearing/reluctor ring had disintegrated (possibly giving the sensor a false reading). I replaced the bearing and sensor, but broke the plug for the sensor. So I left the sensor disconnected and have been driving the car for a couple of weeks, with ABS light ON and no braking issues at all. I finally got a replacement plug and re connected the sensor. ABS lights are now off, but after 100 miles of driving the original braking fault is back.

 

It sounds like an ABS issue and I still need to check the passenger side bearing.

 

Questions:

 

Are there any other things i should be checking on the ABS system?

 

Does the ABS system only look at the front wheels on this model of Fabia (rear brakes are drums)?

 

thanks in advance

Did you use the correct tool to replace the bearing?

ABS looks at all four wheels 

.

Edited 9 September, 20178 yr by Wino
Double post

Used a hydraulic press to install the bearing into the hub.

 

where are the sensors for the rear drum brakes?

Oh dear. Stick "Gen 2 bearing" into youtube and you'll see some videos that show how it needs to be done. You need a kit of tools that gets in behind the hub to push from there, otherwise you're pushing on the inner of the bearing as you insert the outer, not good for the bearing at all.

 

The rear ABS sensors poke in through the drum backplates a few centimetres below the wheel cylinders, I think.

I put packers between the outer track of the bearing and the back face of the hub, to press the outer track into the housing.

Sounds reasonable.

I had a similar thing on my MPI in that when I braked from high speeds the pedal would sometimes go hard and brakes would hardly work. It felt terrifying! Anyway, I have since replaced the plastic servo pipe which has a non-return valve in it and it hasn't done it since.

Servo pipe part number for 1.4 MPI 8 valve is 6Q2612041E

Thanks for that. I've checked the servo pipe and check valve. all ok. Still getting the fault. I have an abs sensor disconnected just now and the brakes are fine, ABS warning lights are ON all the time (because the sensor is disconnected). guess I need to start at the beginning. Check all wheel bearings and sensors. Any other advice is appreciated, thanks

A few weeks ago I also checked my brake servo pipe, at a quick glance it looked OK but when I ran my fingers around the non-return valve the pipe simply fell to pieces, once fitted with a new pipe, all was OK.

 

DB.