Parts for your 2015 Audi Q5-Drive belt pulley

2015 Audi Q5 drive-belt pulleys — purpose, care, and when to replace

Drive-belt pulleys are very much used on the 2015 Audi Q5 (model 8R). Technical sources including Audi’s ElsaWin workshop procedures and ETKA parts catalogue for the 2015 Q5, along with the Gates and Dayco AU/NZ application guides, list multiple auxiliary-drive pulleys across the engine range. These include the crankshaft vibration damper (harmonic balancer), alternator overrunning pulley, belt tensioner and idler pulleys, with the 3.0 TFSI also running a supercharger drive belt and pulley, and many variants using a separate stretch belt for the A/C compressor.

What do they do? The pulleys route and control the multi-rib belt(s) that spin the alternator, A/C compressor and, on some engines, the supercharger or ancillary pumps. The crank pulley dampens torsional vibration, the alternator pulley freewheels on overrun to smooth out belt shock, and the tensioner/idler pulleys keep the belt tracking true. If a pulley seizes or the damper fails, the belt can slip, squeal, or even jump off, taking out charging and A/C in one hit.

As part of regular servicing on a 2015 Q5, a quick look and listen goes a long way:

• At each service (around 15,000 km), check belt condition for glazing, cracks, fraying or oil contamination.
• With the engine idling, note any chirps, ticks or rattles that change with revs — common signs of a worn idler, tensioner, or alternator overrunning pulley.
• Watch the tensioner arm, excessive flutter often points to a failing damper or OAP.

Replacement timing is typically belt at 90,000–120,000 km or 6 years (sooner if noisy or contaminated), with the tensioner and idler pulleys commonly renewed at the same time. On engines with a separate stretch belt for the A/C or a supercharger drive, those belts are single‑use and must be replaced once removed. The alternator overrunning pulley often wears by the 100–150,000 km mark, if there’s belt whip on throttle lift or a dry rattle at idle, plan to swap it.

DIYers should use the proper counter-hold tools, torque specs and any single‑use fasteners (especially at the crank pulley). Battery disconnection and a clean, oil‑free belt path are musts. If under the bonnet checks turn up anything suspect, booking the Q5 in before a long roadie can save a lot of drama at the roadside.

FAQ

How often should the drive belt and pulleys be replaced on a 2015 Audi Q5?
Most owners will be fine inspecting every service and planning a belt change around 90,000–120,000 km or 6 years. Tensioner and idler pulleys are usually done with the belt. If there’s noise, wobble, or visible wear, don’t wait—replace sooner. Engines with A/C stretch belts or a supercharger belt require new belts once removed.

What are common signs a pulley is failing on a Q5?
Tell‑tales include a cold‑start chirp, metallic rattle at idle, belt wander, visible pulley wobble, or charging issues. An alternator overrunning pulley on the way out often causes belt whip when lifting off the throttle. Any of these are a cue to inspect the full belt drive—belt, tensioner, idlers, and damper.

Can it be driven if a pulley is noisy?
It might still move, but it’s not a good idea. A noisy pulley can seize or shed the belt, which can take out charging and air‑con, and in worst cases damage covers or adjacent components. If the Q5 starts making new belt noises, it’s best to get it checked before the next trip.