FabiaGonzales

I couldn't find any other threads, for the MK3 at least, with any reliable information about bolt-on larger upgrades for the brakes. So I set about finding some information. It seems that there is still a 288mm option officially listed for whatever reason (presumably just carried over from the MK2 VRS), but is not used in practice. Though, 288mm isn't a great deal bigger than 256mm that come as standard, I also found that the Polo GTI comes with 312mm brakes on the front. But what about the rear? Everything seems to use 230mm solid discs on the rear, except for the Polo R WRC, which comes with 254 mm brakes on the rear. 230mm is standard and boring, i won't bother with parts links here. 288mm front brakes are the largest possible brakes that can be used with 15 inch alloys though. 312mm front brakes are possible with 16 inch or larger alloys. 254mm rear brakes will fit 15 inch alloys, maybe even less, but ideally you only need this if you're going 312 at the front. You will also need to change the handbrake cable when upgrading to these. (possibly maybe able to re-use if you have discs on the rear already NOT SURE) These rear brakes may also have other minor complications, I've read you must change the settings with a scan tool for the ECU/ABS unit to handle the larger brakes properly. You can get away without changing anything if you only do the front brakes, but the rear brakes you can end up with braking imbalances from the front/rear. (or so i've read, at least) Part nos for 312mm Front Brakes PR Number: 1ZR Left Caliper: 1K0615123M Right Caliper: 1K0615124M Caliper Carrier: 6C0615125 Brake Pads: 8X0698151 Brake Disks: 6R0615301B Hose: 6R0611701D Catcar.info Link Part nos for 288mm Front Brakes PR Number: 1ZC Left Caliper: 1K0615123E Right Caliper: 1K0615124E Caliper Carrier: 6R0615125 Brake Pads: 5K0698151 Brake Disks: 6R0615301A Hose: 6R0611701E Catcar.info Link Part nos for 254mm Rear Brakes PR Number: 1KD Left Caliper: 1J0615423E Right Caliper: 1J0615424E Caliper Carrier: Struggling to find this! Brake Pads: 1E0698451 Brake Discs: 6R0615601A Hose: 1J0611775 Handbrake Cable: 6R0609721C (not too sure on this) Brembo Parts Page If anyone else has any good information please post it!

So a while ago, i was getting pretty bad engine rocking (sounded like the engine was going to drop out whenever the wheels spun up), and combined with my inexperience with how NVH works, i had the large rubber bush on the dogbone mount replaced with a poly one, the original had split and was allowing almost free movement back and forth. This was a huge hassle as the mount was damn near impossible to install with the new bush in place. Eventually i got it in. Instantly, huge vibrations at idle and below 2k rpm, but by heck the gear changes became absolutely beautiful and buttery smooth! Over time the mount bedded in and suchlike, it almost completely eliminated the wheel hop banging, now it just shuddered when the wheels slipped. I then noticed a slight split in the gearbox mount (the famous one known to squeak or fail), and replaced that with an OEM one designed for diesels, wheel hop completely gone! The wheels just slip and screech. The new gearbox mount also very slightly reduced the amount of vibrations that were going through the car, but after some time, i was given an OEM dogbone mount which like the replacement gearbox one, was designed for diesels. I fitted it... No wheel hop... No banging like the engine would fall out... and best of all... absolutely NO vibrations at idle! Clutch and gear changes are ever so slightly odd feeling, but i guess they will until i get used to it again, nowhere near as bad as original though. I have a feeling this was caused by the fact the bush is so large it was clamped too much by the subframe, restricting its movement too much. Below is a picture of the mount in question. The original black bracket must be used as the one for the diesels is slightly different. TLDR,; Don't put poly bushes in the dog-bone mount! Instead replace the gearbox mount and the dog-bone mount with the diesel counterparts; Diesel Gearbox Mount: 6Q0 199 555 AS (AR is original petrol one) Diesel Dog-bone Mount: 6Q0 199 851 AP (AS is original petrol one)

It's done it since ive owned it (coming up to 3 years), but ive not noticed any other cars doing it. Basically when i pull away, sometimes the exhaust note changes for a moment and it's quite loud compared to its normal tone. It's almost as if momentarily something was bypassing the silencer, very low loud noise, seems to mostly happen between 1k to 1.4k rpm, and more often when cold. anyone else get this? anyone know what it is?