I've been driving for a few weeks ignoring the check engine light to see if the car would act up, and really hoping that it would go away. Since I have to make 1400 mile trip from DC to Houston soon, I figured I better get it checked and fix whatever it says. I was informed by the dealer that the MAF needed replacement. OK, no problem on the MAF since I know it breaks down. While he had it, he stated that rear brakes needed replacement. I didn't get to physically check the brakes since I was in a rush. Question---does the rear brakes really need replacement at 60K (2006 SV8) miles? Seems to me that is pretty low mileage. I am not a hard driver by any means and very light on the brakes.

Any comments on the brake issue?

 

I have read many threads/posts stating that the rears do, for some reason, go much quicker than the front. I can say that mine, however, were opposite when I changed the pads last weekend - the front had almost nothing left on them, the rears about 1/2 of the pad remaining. Those soft OEM pads get eaten through pretty quickly.

 

I was quite surprised whan I first replaced the rear pads/disks at about 35k miles. In contrast I've only recently changed the front pads at 70k and the disks were in excellent condition.

I suspect it depends on your usual driving route. I live by a steep hill which I go up and down daily. On the way down I'm not using the accelerator and the car "knows" to favour engine braking. However, I seem to get more braking effect than I would expect from the engine revs and I'm absolutely convinced the car gently applies the rear brakes in this situation. I'm guessing it does it in other situations too.

Julian.

 

I'm curious...what 'brakes' do the adaptive cruise control module select when it activates the brakes for us?

 

I was down on metal after 50k kilometer, snow and ice makes rear brakes working hard.

 

UPDATE: Over the weekend I pulled the rear wheels off to verify the rear brakes. It was at 3/16". In contrast the front was at least 1/4". I guess the pads need to be replaced. Also, I noticed the rotors were worn down too. It had a groove/ridge that was around 1/16th. I hope they just can turn the rotors and reuse it.

Since the MAF is an easy job, I'm in the market for a code reader. Any suggestions? If I had one, I could've read the codes and replaced the MAF myself.

 

https://www.jaguarforums.com/forum/g...oved-**-33347/

Be sure to read through all pages, I haven't updated the list for many months, there could be some others in the last couple pages, or cautionary tales not mentioned in the initial post. Hope it helps.

 

Reason the rear brakes don't last long, is they are a subsititute for a limited slip differential, so the car is using the rear brakes as well as the owner !

 

...if so, then I should disengage the "anti-skid" button. Wouldn't this prevent the brakes from continously engaging/acting as a limited slip differential and/or anti-skid? I know the use is a safety option.

 

Hmmm.... Best to keep the car as Jaguar intended, i.e. replace the brakes as advised, and keep the stability control 'on'. Of course you can turn it off, but AFAIK, the system will still use the rear brakes instead as a substitute for a limited slip diff.

Of course you don't have to replace with Jaguar parts, there are plenty of after-market discs and pads out there at lower cost.

 

I think this is a great reason to keep the "dsc/abs" warning lights on due to dirty speed/abs sensors. Then, the DSC is completely defeated, which is the real culprit in rear brake use by the car's "brains".

 

https://www.jaguarforums.com/forum/x...ice-how-61323/

I have found that the rear brake calipers have an integrate braking brake mechanism inside the piston bore. The piston can't be pushed back, it threads back into the bore, so when the brake releases its doesn't appear to move off the rotor. This is more obvious when you remove the caliper from the rotor on the front then remove a rear caliper. I would seem it drags slightly causes more wear.

 

Road King

You strike me as not the sort of person to spend money for no reason.

Try cleaning the MAF with the right cleaner. Don''t touch the wire just squirt cleaner at it.

New pads are about 8 mm when they are new and 3/16" is 4.7mm so you have used 41% of your pads.

Do you still think they need replacing?

New rotors are 30 mm thick. Jaguar recommend replacing the rotors at 28mm,

That's 1 mm per side!!! or about a 7% reduction in the thickness.

My front rotors are less than 28 mm and I have great brakes!

Ask yourself what is the worst case scenario if you do nothing?

IMO the worst is that your rotors will warp and if that ever happened you will feel it and then you could change them!