Subaru WRX Timing Belt or Chain (All Years 2002–2025)

The Subaru WRX is a turbocharged all-wheel-drive performance sedan sold in the United States from the 2002 model year to the present. Originally based on the Impreza, it became a standalone model in 2015. Timing system type varies between model years and trims, including the higher-performance STI variant.

Correct timing system identification is essential for maintenance planning and engine reliability. Belt-driven WRX engines require scheduled replacement to prevent catastrophic failure. Chain-driven engines eliminate belt service but depend on proper oil maintenance for long-term timing component health.

Does the Subaru WRX Have a Timing Belt or Timing Chain?

Subaru WRX models from 2002 to 2014 use timing belts on all engines. From 2015, the standard WRX switched to a timing chain, but the WRX STI retained a timing belt through 2021. All 2022 and later WRX models use timing chains.

2025 Subaru WRX Timing Belt Or Timing Chain

The 2.4L turbo uses a timing chain with no replacement interval. This continues the chain-driven design from the previous generation.

2024 Subaru WRX Timing Belt Or Timing Chain

Same timing system as previous model year. Oil maintenance remains the key factor for chain tensioner longevity.

2023 Subaru WRX Timing Belt Or Timing Chain

No timing belt exists in the current lineup. Chain reliability depends on clean engine oil.

2022 Subaru WRX Timing Belt Or Timing Chain

The 2022 WRX introduced the FA24F engine with a timing chain. No timing belt option is offered.

2021 Subaru WRX Timing Belt Or Timing Chain

The WRX used a chain, while the STI retained a timing belt. STI owners must follow the 105,000-mile belt replacement schedule.

2020 Subaru WRX Timing Belt Or Timing Chain

No timing system changes from the previous year. Two different timing systems existed across the two trims.

2019 Subaru WRX Timing Belt Or Timing Chain

The WRX continued with a chain, the STI with a belt. Maintenance requirements differed significantly between the two.

2018 Subaru WRX Timing Belt Or Timing Chain

No changes in timing system hardware. STI owners must budget for periodic belt replacement.

2017 Subaru WRX Timing Belt Or Timing Chain

Timing chain or belt depends solely on the trim. The base WRX avoids belt costs; the STI does not.

2016 Subaru WRX Timing Belt Or Timing Chain

Trim-level variation continued. Chain-driven WRX engines require only routine oil maintenance.

2015 Subaru WRX Timing Belt Or Timing Chain

The standalone WRX debuted with a timing chain, a major departure. The STI continued the belt-driven EJ257.

2014 Subaru WRX Timing Belt Or Timing Chain

All WRX and STI models used timing belts. The 105,000-mile replacement applied to both turbo engines.

2013 Subaru WRX Timing Belt Or Timing Chain

No timing chain was available. Belt service remained a critical part of the maintenance schedule for both models.

2012 Subaru WRX Timing Belt Or Timing Chain

The belt-driven EJ engine family continued without change. Replacement at 105,000 miles prevented interference damage.

2011 Subaru WRX Timing Belt Or Timing Chain

The refreshed 2011 WRX kept the belt-driven EJ255. Scheduled belt service remained essential.

2010 Subaru WRX Timing Belt Or Timing Chain

Belt replacement continued as a necessary scheduled service for the 2010 lineup.

2009 Subaru WRX Timing Belt Or Timing Chain

The 2.5L turbo engine got a power increase but retained the timing belt. The 105,000-mile interval applied.

2008 Subaru WRX Timing Belt Or Timing Chain

No timing chain option existed. Belt replacement remained mandatory for both the WRX and STI.

2007 Subaru WRX Timing Belt Or Timing Chain

Scheduled belt service at 105,000 miles was critical for engine reliability.

2006 Subaru WRX Timing Belt Or Timing Chain

Both engines now displaced 2.5 liters but continued with timing belts. The 105,000-mile replacement interval remained.

2005 Subaru WRX Timing Belt Or Timing Chain

All engines used timing belts. The STI continued alongside the 2.0L WRX with identical replacement intervals.

2004 Subaru WRX Timing Belt Or Timing Chain

The STI debuted with a 2.5L engine but still used a timing belt. Both engines required scheduled replacement.

2003 Subaru WRX Timing Belt Or Timing Chain

No STI existed yet. The 2.0L WRX relied solely on a timing belt.

2002 Subaru WRX Timing Belt Or Timing Chain

The original U.S.-market WRX launched with a timing belt and a 105,000-mile replacement schedule.

Timing Belt vs Timing Chain on the Subaru WRX

A timing belt in older WRX models is a reinforced rubber belt that synchronizes the crankshaft and camshafts. It operates quietly but degrades over time, requiring scheduled replacement to prevent sudden breakage and catastrophic engine damage in interference engines.

A timing chain is a metal chain performing the same function. It was introduced on the WRX in 2015 with the FA20F engine. Chains are designed to last the life of the engine and do not appear on the regular maintenance schedule.

Belt-driven WRX and STI models require replacement at 105,000 miles. Skipping this service on an interference engine often causes bent valves and major repair bills. Chain-driven FA engines eliminate this periodic expense but rely on clean engine oil for tensioner and guide health.

Belt replacement on a WRX typically costs $700 to $1,200. Chain issues are uncommon but may produce a cold-start rattle if the tensioner wears. Ignoring abnormal noise in either system can lead to complete engine failure.

Subaru WRX Timing System Maintenance

Timing belt-equipped WRX and STI models (2002–2014, and STI through 2021) require replacement every 105,000 miles. The service must include the timing belt, tensioner, all idler pulleys, and the water pump if it is timing belt driven.

A failing timing chain or tensioner may cause a metallic rattling noise from the front of the engine on cold starts. Camshaft/crankshaft correlation diagnostic trouble codes can also indicate chain stretch or guide wear. These symptoms require immediate inspection.

Engine oil is critical for timing chain life. The hydraulic tensioner and chain guides depend on clean oil at the correct viscosity. Following the manufacturer’s severe-service oil change intervals helps prevent premature wear, especially in turbocharged applications.

While timing chains are lifetime components, they are not immune to failure. Oil starvation, high mileage, or mechanical defects can cause tensioner or guide issues. Have a qualified technician inspect the timing system if unusual noise is present.

Frequently Asked Questions

Does the Subaru WRX have a timing belt or chain?
It depends on the model year and trim. 2002–2014 WRX and STI use timing belts. 2015+ WRX has a timing chain, but the STI kept a timing belt through 2021. All 2022+ WRX are chain-driven.

When should a Subaru WRX timing belt be replaced?
All belt-driven WRX and STI engines require replacement at 105,000 miles. This includes the timing belt, tensioner, and idler pulleys, plus often the water pump.

Does the timing chain need maintenance on a Subaru WRX?
The timing chain itself has no scheduled replacement. However, frequent oil changes with the correct viscosity are essential to maintain the hydraulic tensioner and chain guides.

Is the Subaru WRX an interference engine?
Yes. All U.S.-market WRX engines, both belt-driven EJ series and chain-driven FA series, are interference designs. Timing system failure can cause valve and piston damage.

How much does Subaru WRX timing belt replacement cost?
Replacement typically costs between $700 and $1,200 at a repair shop. This includes labor, the timing belt kit, and often the water pump if it is belt-driven.

What are symptoms of a failing timing chain on a WRX?
Common symptoms include a rattling noise from the front cover during cold starts, camshaft/crankshaft correlation trouble codes, and a loss of engine performance.

Conclusion

The Subaru WRX used timing belts exclusively from 2002 to 2014. Starting in 2015, the standard WRX adopted a timing chain, while the STI retained a belt through its final 2021 model year. All WRX models from 2022 and later are chain-driven.

This variation means a 2020 WRX could have a chain or belt depending on whether it is the base model or STI. Always verify the specific trim and engine before planning service. Always verify timing system details using the owner’s manual or manufacturer service information before scheduling repairs.