Think you guys need to look at the research i've done and posted up on the tt-forum....have a read of the below. (dont's forget S3s use a BAM engine as of MY01 or thereabouts which is when the recommendation changed to 80k)
Some of you may have read the research i did over a year ago on cambelts, and the mess of information and pricing (particularly labour hours) that exists in the Audi main dealer network. Here's the link if you want to review:
http://www.tt-forum.co.uk/ttforumbbs/viewtopic.php?t=51526
So we need evidence from official Audi sources on what the cambelt interval recommendation is....
Well...the evidence i can contribute is not an official statement in writing of the current situation, but i can give evidence of what the cambelt intervals at least were as of late 2005...(and given the supposed issuing and deissuing of the 4 year statement irrespective of mileage, than i still believe these pieces of evidence to still be valid of the current situation....but its only my understanding..i may be wrong!)
Anyway here goes
Taken from ElsaWin - Audi's official in garage electronic reference manual, i investigated the official maintenance tables for the following:
1 - a MY2000 TT Coupe with an APX (165 KW) engine eg, 225 quattro
2 - a MY2002 TT Coupe with an BAM (165 KW) engine eg, 225 quattro
3 - a MY2004 TT Coupe with an ARY (132 KW) engine eg, 180 quattro
See this image for the MY2000 APX TT
Notice all figures for mileage are in kilometres (Km), as can be quite clearly seen the official figure is 180000 Km...which if you do the conversion is 111,846 miles, but Audi Uk always round this to 115,000 miles.
See this image for the MY2002 BAM (225 PS)TT
Again , you can quite clearly see 120000 kilometres is the figure, which when converted is 74,564 miles...Audi UK round this to 80,000 miles.
The change of interval as i understand came in in MY2001 which is roughly around 1/9/2000 when the BAM cars debuted(its around this time anyway) , however the advice changed and whether you were APX or BAM after the start of MY2001 it was officially 80000 miles.
See this image for the MY2004 ARY (180PS) TT
As far as i can see all 180 PS versions (and presumably 150 PS) versions of the TT have always been and remain in the maintenance tables at 180000 Km period as proven by the above screen shot.
A small additional point is that nowhere in ElsaWin (at least my use of it anyway) does it mention a 5 year replacement interval....i however do agree that the concept of replacement irrespective of miles is a good thing...and i know Audi CS has given this info many times to callers...maybe there is a Technical Service bulletin somewhere that stipulates the five years, but i've not seen any evidence in the public domain.
Additional evidence for the 80,000 miles recommendation for BAM engines at least comes from the Official Audi Maintenance Tables that were published (maybe they still are) on the audi.co.uk website. The screenshot below was took from an Aug 2005 dated xls downloaded from the website:
Again quite clearly the 80,000 miles can be seen and no mention of 5 years etc...the only thing that seems to be time related is brake fluid service interval..although an AVS service itself is subject to a max period of 2 years.
Also to back up what is officially printed in the service schedule booklet , look at these 2 images
08/2000 printed service book additional work page
Wak's example which i believe comes from at least a 2001 printed manual
The key change is the addition of the small 1)..meaning we can give a broad brush statement of 115,000 miles because it makes printing all are service books easy!...however the real interval is dependent on your engine code and MY and we can't be bothered to print a definitive list!....OK perhaps i'm being a bit mean here, but without reading and thinking very carefully, all MY2001 and beyond 225 owners would be thinking myabe they are safe up to 115,000 miles........which of course they most certainly aren't!
All the above while not the definitive current statement is hopefully something for you all to chew on. However none of this changes my view that replacement should be in the band 55 - 65k miles mark, and 5-6 years max depending on your viewpoint...my unmodified car has just been done at 62k and 5.5 years and the Waterpump impeller was in bits!!!!...the belt and tensioners were fine, just a slight stretching of the belt, but the waterpump is the weak link...get a nice metal impellered fitted like i did.
What i would like to see is anyone who has WRITTEN proof of the 5 year statement on recommended interval....or any proof of the supposed four year rule that came out and was withdrawn ealrier this year....or any official Service bulletin that addresses what the current situation is!
All comments welcome as always
HTH