Hi guys,

I am not 100% certain on which front discs to buy for our Roomster. 2009 1.4D 80BHP.

All of the eBay sellers match my car with the 256mm front brakes based on the reg plate, although the PR number does not match with mine on their listings.

I have read the few available threads on this topic and I do not have the FS III on my calipers. I've taken the wheels off and nothing is on the calipers.

The current front discs are 288mm, and even though I would have hoped that the last disc change would have been correct, I have no way of being certain, especially as some of the online info suggests that smaller engines would generally have 256 discs.

Trying to find this info has taken longer than the job will!

Any pointers on how to find the correct size?

Tried a couple of vin searches that returned as being unrecognised, so that was helpful.

Cheers,

Joe.

Edited 31 July, 202531 Jul by joeninho

Hi Joe, 288mm discs cannot be fitted to a car that originally had 256mm, without changing lots of other stuff.

Where have you found a PR code for your front brakes? That's not usually found on the build sticker.

What is the reg? I can look up for you.

Thanks, Pete. The reg is SJ09 NKZ.

I checked the second number down in the first column on the build sticker, as per the advice from some eBay sellers. That number corresponded to the ABS on mine IIRC.

Cheers,

Joe.

Also, be careful when buying 288mm discs, they don't all have the same depth of the bell part, as I found out too late after ordering carelessly.

The factory-fitted discs for this reg are 288mm diameter x 25mm thickness. Front brake PR code is 1LN.

Genuine front disc part number is 1J0 615 301R, which has been superseded by 6R0 615 301D.

Beware of buying any aftermarket discs that do not mention equivalence to these numbers.

Not a bad idea to take a wheel off and measure the depth from front face of disc to wheel mounting face, then comparing with sellers' dimensioned drawings too.

Just looked at ours, and you'll be able to get a pretty reasonable measurement through the spokes of the alloys. Looks to be about 10mm or so.

This is a pic of my knob-up on that front. Wrong size shiny new disc versus original. Shiny ones had to go back for a refund.

Don't assume yours are the same though, measure.

Great stuff, Pete.

Thanks for that. I'll have a scout around and measure up for additional certainty!

Cheers,

Joe.