Parts for your 2008 Subaru Tribeca-Drive belt

2008 Subaru Tribeca drive-belt — what it does and when to change it

Yes, the 2008 Subaru Tribeca absolutely uses a drive-belt (serpentine/accessory belt). Technical references that confirm this include the Subaru Tribeca 2008 Service Manual for the EZ36D engine (see the Drive Belt section), Subaru’s official parts catalogue listing a multi-rib accessory belt and tensioner for the 3.6-litre H6, and aftermarket catalogues from major belt manufacturers that specify a 7‑rib serpentine belt for this model. Note: the Tribeca’s camshafts are driven by a timing chain, not a timing belt, so the accessory drive-belt is a separate item that handles the engine’s external ancillaries.

On this model, the drive-belt spins key accessories under the bonnet: the alternator (charging the battery), the air-conditioning compressor (keeping the cabin cool), and the power steering pump (providing assist). Without a healthy belt, charging issues, heavy steering, or no A/C can quickly appear — not the sort of surprises anyone wants on a weekend away.

For servicing, it’s smart to have the belt inspected at each service visit (typically every 10,000–15,000 kilometres or 6–12 months, depending on the workshop schedule). In Aussie and Kiwi conditions — with heat, stop–start traffic, and the odd dusting from country roads — the belt can age faster. Many owners end up replacing the belt somewhere around 90,000–150,000 kilometres, but condition beats kilometres every time.

Common signs it’s ready for replacement include:

• Chirps or squeals on cold starts or when accessories load up
• Cracks, fraying, chunking, or glazed/shiny ribs
• Visible rubber dust near pulleys, or wobble from the tensioner/idlers

The EZ36D uses a spring-loaded automatic tensioner, so belt swaps are usually straightforward for a competent technician with the right tool to relieve tension. Good practice during a belt replacement is to check the tensioner and idler pulleys for smooth, quiet rotation and replace any rough or noisy bearings. Fit a quality EPDM belt, confirm all ribs are aligned in the pulley grooves, and recheck operation. A post-service listen after a few hundred kilometres is a handy belt-and-braces check.

Worth repeating: the Tribeca’s timing is chain-driven, so there’s no timing belt interval to worry about — but the accessory drive-belt still needs routine attention to keep the electrics, A/C, and steering happy.

Popular questions about the 2008 Subaru Tribeca drive-belt

Does the 2008 Tribeca have a timing belt or chain?
It uses a timing chain for the camshafts, so there’s no timing belt to replace at an interval. Separate to that, it has a serpentine drive-belt for the alternator, A/C and power steering, which does need periodic inspection and replacement based on condition.

How often should the drive-belt be replaced?
Have it inspected at every service and replace when wear shows — many owners see replacement somewhere around 90,000–150,000 kilometres. Heat, accessory load, and driving conditions can push that earlier or later.

What type of belt does it use?
The 2008 Tribeca 3.6-litre typically uses a 7‑rib serpentine belt. Exact length can vary by market/build and accessory configuration, so confirming by VIN or existing belt part number is the safest bet.