Subaru Timing Belt Replacement Cost
Comprehensive replacement of the engine timing belt, hydraulic tensioner, water pump, and idler pulleys on EJ-series engines.
Why this fails
Rubber timing belts degrade over time due to heat and mileage; on EJ253, EJ255, and EJ257 engines, the service interval is 105,000 miles or 105 months, though idler pulley bearing failure is often the primary cause of belt snap.
What the job involves
- Removal of the radiator fans, accessory drive belts, and the crank pulley (harmonic balancer).
- Removal of the three-piece plastic timing covers to expose the belt drive system.
- Alignment of the crankshaft and quadruple camshaft marks (on DOHC models) to 'safe' timing positions.
- Extraction of the old belt, hydraulic tensioner, three idler pulleys, and the water pump.
- Installation of new components, manual rotation of the engine to verify timing alignment, and refilling/burping the cooling system.
If you delay this repair
Subaru EJ engines are interference engines. If the timing belt snaps or an idler pulley seizes, the pistons will strike the valves, resulting in catastrophic engine failure and repair costs exceeding $4,000.
Save money
- • Always replace the water pump and all idler pulleys at the same time; the labor is the same and a failed $40 idler will snap a brand new belt.
- • Purchase a comprehensive 'Timing Belt Kit' (like Gates or Aisin) which includes the tensioner and pump at a lower price than buying individual OEM boxed parts.
- • Inspect the camshaft and crankshaft seals while the belt is off; if they are leaking, replacing them now saves $400 in labor later.
OEM part numbers
FAQ
How much does subaru timing belt replacement cost cost in 2026?
Expect $750–$1,450 at most US shops, parts plus labor.
How long does the job take?
4–6 labor hours typically.
Can I do this myself?
Yes — DIY difficulty 5/5.
What happens if I delay?
Subaru EJ engines are interference engines. If the timing belt snaps or an idler pulley seizes, the pistons will strike the valves, resulting in catastrophic engine failure and repair costs exceeding $4,000.