Parts for your 2006 Subaru Tribeca-Drive belt

2006 Subaru Tribeca drive-belt — what it does and when to change it

Technical sources confirm the 2006 Subaru Tribeca (B9 Tribeca, EZ30 3.0L H6) is fitted with accessory drive-belts. The Subaru factory service manual for the 2006 Tribeca (Mechanical H6 section), the Subaru parts catalogue (Group 73, V‑ribbed belts), and major aftermarket application catalogues (Gates and Dayco) all list two V‑ribbed accessory belts on this model. The engine’s camshafts are driven by a timing chain, not a timing belt, so the drive-belts discussed here run the engine accessories, not the valve timing.

On this Tribeca, the drive-belts spin key ancillaries under the bonnet: the alternator (charging system), power steering pump, and the air‑conditioning compressor. Without healthy belts, charging drops off, steering gets heavy, and A/C performance dives — not ideal on a hot Aussie or Kiwi afternoon.

Most 2006 Tribeca H6s use two multi‑rib belts with dedicated tensioner and idler pulleys. Over time, heat, dust, and age harden the rubber and wear the ribs, which can lead to slipping and noise. Routine inspection is the best defence.

• Have the belts checked at every service (around 10,000–15,000 km).
• Plan belt replacement around 90,000–120,000 km or 6 years, whichever comes first, or sooner if wear is found.
• Replace both belts together if the vehicle is fitted with a pair — it keeps tension and wear even.

Easy signs it’s time:

• Chirping or squealing on cold start or when turning the steering at idle.
• Cracks, fraying, glazing, missing ribs, or rubber dust around pulleys.
• Battery warning light flickering, heavy steering, or weak A/C at idle.

When fitting new belts, use quality OEM‑equivalent parts, clean the pulley grooves, and check the condition of idler and tensioner bearings — a rough or noisy pulley will chew through a fresh belt. Don’t lever a belt over a pulley