V6S Brake Disc Issues

Y

y700suf

New member
I noticed a squealing from the front brakes of my V6S recently so brought the car into the dealership to get it checked.

I experienced similar problems with my other car (Audi RS4) several years ago. At the time, the garage said the front brake discs were scored and would need to be replaced. I ended up changing the pads to a softer variety and the problem disappeared. Another garage said the disks were perfectly fine.

I wonder if the same overly keen diagnosis is happening here. Difference is, the V6S is still under warranty although the dealership is saying any repair/replacement of disks and pads is not covered under warranty.

So, 3 questions:

1. Anyone else experienced similar problems (a search of the forum suggests brake rust is a problem with the F-Type)?

2. Any experience with getting the repair/replacement done under warranty?

3. Suggestions for what to do in this situation? I'm inclined to just change the pads myself, for instance

Thanks.
 
Mileage is 23K.

Front pads are at 10mm, new would be 13mm, so barely 25% worn.

They are quoting c. £200 for de-glazing the rear discs and c. £900 for replacing the front discs.

Not sure what other information would be required to ascertain whether this is a warranty repair/replace?
 
Well presuming that its on second set of front pads I would question if front disc are fit for purpose. It should not have worn out a set if disks in 23k. That is less than two years of normal driving. And only second service mileage.
 
I run a V6S and noticed on turn in a squealing noise from front disc. Sounded like a stone in the disc.
Dealership took 1 traffic island with me driving to diagnose as rust on the disk lip fouling a suspension member. Sent me a video of it, while I sat in reception. Said it is common. Fixed while in for other warranty work FOC.

Had it’s mot a few days later and asked about the disks, pads and brake performance and was told it was all perfect
 
Thanks cj10jeeper, although sounds like a slightly different issue?

Did they fix the disc itself or the suspension member (?) impacted by the disc?
 
y700suf said:
Thanks cj10jeeper, although sounds like a slightly different issue?

Did they fix the disc itself or the suspension member (?) impacted by the disc?
Click to expand...

Ground the rust off the disk. I believe it was done simply spinning the wheel by hand against a cutting tool aligned on the disc
 
Apologies for going off topic but GTB - beautiful 🙂

When I was a youngster I got a lift to my sister’s wedding with my uncle in his fibreglass one - still love seeing one!
 
My SVR had grinding noise while turning left at low speed - turned out to be a loose bolt on the brake shield gouging the disc - I believe they ended up replacing both front rotors and pads under warranty - hopefully the technician torqued the bolts up properly ;)
 
Thanks to all those who provided perspectives on the topic.

Irrespective of the cause, I would be keen to know how those with repaired/replaced discs managed to do so under warranty.

My brake disc issue has got escalated to JLR who requested tests and photographs of the discs from the dealership.

Their assessment was:

I have received a response from our technical team who confirm that the brake discs on your vehicle have only got light pitting and negligible corrosion. However, one disc seems to be lipped and it looks like it is below minimum thickness which would be the reason to replace them, not the corrosion.

Notwithstanding this assessment for a car still under manufacturer warranty, both the dealer and JLR are claiming that brake discs are consumable items and therefore not covered by the warranty.

Any thoughts on how to get the message through that brake discs don't wear out after 2 years?!
 
y700suf said:
Their assessment was:

However, one disc seems to be lipped and it looks like it is below minimum thickness which would be the reason to replace them, not the
Click to expand...
\

y700suf said:
Any thoughts on how to get the message through that brake discs don't wear out after 2 years?!
Click to expand...

From a technical standpoint, the answer to your question is in their reply;
The car is not designed to brake using only one wheel. Braking 'across' the car is balanced 50/50 (Ignoring Toque vectoring by Braking - assuming you aren't tracking the car, or if you have it on your model?)
For one rotor to be worn more than the other on the same axle identifies an imbalance in the braking system, and a potential fault that needs to be investigated further.

HTH?
 
As to £900 for front discs that's laughable!

Even their own fixed price servicing is showing a slightly less ridiculous £575 for the discs, pads and sensor (although slightly misleading by quoting plural sensors when there's only 1 at each axle)...

https://www.jaguar.co.uk/owners/servicing-maintenance/fixed-price-servicing.html

I too had a slight noise on one (left?) lock that was cured with new discs.
 
Thanks all for the further, helpful replies.

The level of proactivity is severely lacking but not surprising given repairs under warranty only eat further into low margins per vehicle.

I'm not sure what the standard or minimum thickness is of brake discs but the point is surely that any erosion at this age/mileage cannot be normal.
 
This is a little crazy to post variations of the same question in 5 threads in the course of an hour.
You’re going to get part replies all over the place.

On the pads and disks.
I tend not to trust dealers on wear and tear of pads and disks as they are over zealous to suggest replacements. It’s not common for front and rear to wear at the same time as the fronts do most of the work. I replaced my rears to match front and at 60,000 miles disks were fine and pads only slightly worn.
I’d suggest go to another local garage and ask for a second opinion, else measure them yourself. Post results on here and with what diameter brakes you have and myself or someone will look up the min thickness for the discs. If you change discs pads need doing too. Wear sensors if not damaged don’t need replacing, but are cheap.

There are many alternatives in the UK from budget to performance of disks and pads but have no idea for your region. Search your car in a few local parts suppliers.
 
You must log in or register to reply here.
Back
Top