It's a $20 part (if you get an OEM belt instead of the Audi branded OE belt) and 20 minutes to replace (much easier to manage the belt around the crank pulley from underneath), so small cost for peace of mind I guess. Reply Like. 01-03-2019, 05:05 AM. # 5. 100 miles before they break. Normally, timing chains are designed to last the life of the car and the rest of the engine. But, the life of the engine is sometimes defined by pistons and valves running into each other when the timing chain breaks. Another failure mode of a timing chain is stretching. That causes the chain to come off the cogs. Timing chains/guides are not a problem on the RS4 – the biggest myth is people worrying about the timing chains (and specifically the plastic guides) on this car…that issue is only specific to the B7 S4 engine, and NOT the RS4. While both the S4 and RS4 have V8s of the same size (4.2L), these are entirely different engines. Replace Every 90,000 kilometres A6 4-cylinder only Spark plugs - Replace Every 45,000 kilometres or 3 years, whichever occurs first RS 3, RS 5, TT RS Coupe S6, S7, A8 8-cylinder only Spark plugs - Replace Every 60,000 kilometres or 6 years, whichever occurs first S3, TTS, A4, S4, A4 allroad®, A5, S5, A6 4-cylinder, A6 6-cylinder, A7, Yeah, timing chain doesn't have a change interval. It's a car life time item ( aka warranty period). You change the timing chain when it's starts rattling. You can notice this noise on cold starts. Always when you replace the timing chain Buy the OEM raplacment set. ( Mercedes parts) It usually lasts 300-400k km on a B class. Web The Most Recent Recommend Timing Belt Replacement Interval For Audi Models With A 3.0L 30 Valve Engine Is 75,000 Miles. The chain has also been redesigned. Audi s4 tdi 255 kw / 342 hp / 347 ps | 2967 cc | 6 | vw ea897 evo2:. Spider101 said: I've got an A4 B9 1.4tfsi and on the myaudi app under service/additional work it lists camshaft drive toothed belt: renew every 140,000 miles. Spoken to my mechanic and he said the mileage is based on if you average 15k per year say. He said most timing belts don’t need replacing till at least 60k. All depends on the mileage. The 4.2 found in b6/b7 s4's uses a timing chain that has to be replaced at 100k. The older b5 2.8tt motor uses belts that have to be done rought every 50-60k if i'm not mistaken. Both motors have to be pulled to replace these parts. I've read that its normal for it to rattle for up to 3 seconds and the tentioners use oil presser to apply the tension hence why if it hasn't gone with 3 seconds you might be looking and new tensioner and timing chains. IamClutchNorris. B8.5 S4. • 2 yr. ago. The timing chain is the crucial link between the top and bottom of your engine. It connects the crankshaft and the camshaft together so that your transmission turns in harmony with your engine. Without that connection, you lose control of your wheels. Most Volkswagen timing chains are made to last at least 120,000 miles. Rolk9.