Parts for your 2011 Subaru Impreza-Drive belt

2011 Subaru Impreza drive-belt: what it does and how to keep it happy

Based on technical references — including the Subaru 2011 Impreza Service Manual, the Subaru Warranty & Maintenance Booklet (MY2011), and industry catalogues from Gates and Dayco — the 2011 Subaru Impreza is fitted with accessory drive-belt(s). These belts power key auxiliaries such as the alternator, power steering pump and air‑conditioning compressor. Most 2011 Imprezas with the EJ-series engine also use a separate timing belt for the camshafts, that’s a different belt to the external accessory drive-belt. So yes, a drive-belt is relevant to this model.

The drive-belt’s job is straightforward but vital: under the bonnet, it transfers crankshaft rotation to the alternator (charging the battery), the power steering pump (lighter steering feel) and the A/C compressor (cold air on hot Aussie and Kiwi days). On EJ engines, the water pump is driven by the timing belt, not the accessory belt — worth noting when planning service work.

Belt layout varies by engine grade, some 2011 Imprezas run one multi‑rib belt, others use two. Either way, the care tips are the same. Subaru’s maintenance guidance calls for regular inspections at routine services (time and distance schedules in the MY2011 booklet), with replacement when wear is present. As a practical rule of thumb in local conditions, expect a quality EPDM belt to last around 60,000–100,000 km or 4–6 years, but always go by condition and the workshop manual specs.

• Check for cracks, fraying, missing ribs, glazing, or contamination (oil/coolant).
• Listen for chirps/squeals on cold start, watch for battery charge warnings or heavy steering.
• Spin and check pulleys/idlers and tensioners, a noisy or rough pulley will eat a new belt.
• Set belt tension to spec (manual adjusters on many EJ models). Recheck after a short drive.
• Avoid belt “dressings”, they mask issues and can shorten belt life.

Timing note for owners: most 2011 EJ-powered Imprezas have a scheduled timing belt replacement around 168,000 km or 105 months (per Subaru service literature). That’s separate to the accessory drive-belt service, but it’s smart to assess both together — many techs replace the accessory belt when doing the timing belt and water pump so everything’s fresh.

Popular questions

Does the 2011 Impreza have a timing belt or chain?
Most 2011 Imprezas with the EJ engine use a timing belt. Subaru service literature specifies a replacement interval around 168,000 km or 105 months. The external accessory drive-belt(s) are different parts and are inspected more frequently. The next‑generation Impreza (launched for MY2012 in many markets) moved to the FB engine with a timing chain.

What are the signs the accessory drive-belt needs replacing?
Look and listen: cracking between ribs, frayed edges, glazing, or oil contamination are all red flags. Squeals at start‑up, intermittent battery warning lamps, heavy steering, or weak A/C at idle can also point to a slipping or worn belt. If in doubt, replace — belts are inexpensive compared with the hassle of a roadside failure.

Can a handy home mechanic change the belt?
On many 2011 EJ models, yes — it’s a straightforward job with basic hand tools and the workshop manual. The keys are correct routing, tension to specification, and checking pulleys/tensioners. After fitting, run the engine, recheck alignment, and retension if specified. If there’s persistent noise, inspect pulleys and replace any that feel rough or wobbly.