When should timing belts be replaced on a WRX?
For WRX models, the replacement schedule depends on the engine type. If your car uses a timing belt, plan replacement around 105,000 miles (approximately 168,000 km) or eight years, whichever comes first, and do it together with the water pump. If your WRX uses a timing chain, there is no fixed mileage-based belt replacement interval; instead, routine inspections and maintenance of the chain and tensioners are advised.
Understanding WRX engine types: belt vs. chain
Subaru’s WRX lineup has evolved from belt-driven EJ engines in earlier generations to chain-driven FA engines in later years. The belt-driven engines require a planned belt service to prevent catastrophic failure, while the newer chain-driven engines rely on wear-based maintenance rather than a fixed replacement interval. Always verify your specific model year and engine code in the owner’s manual or with a dealer.
Belt-driven WRX (EJ-series) replacement schedule
The following guidelines apply to WRX models that still use a timing belt. These intervals are widely cited in owner manuals and service literature, but always confirm against your car’s documentation.
- Replace the timing belt at about 105,000 miles (168,000 km) or eight years, whichever comes first.
- Replace the water pump, tensioners, and idler pulleys at the same time as the belt.
- Inspect the belt at regular service intervals for signs of wear, cracks, fraying, glazing, or oil contamination, and replace sooner if any wear is detected.
- In severe driving conditions (extreme heat, lots of stop‑and‑go traffic, or frequent high-load use), some owners opt to replace earlier as a precaution, though this is not a universal requirement.
Keeping to these guidelines helps prevent a potentially catastrophic timing event and minimizes the chance of engine damage that can occur if a belt fails while the engine is running.
What to expect during a belt replacement service
During a typical timing belt service on belt-driven WRX models, technicians commonly replace the timing belt, water pump, tensioners, idlers, seals, and often the cooling system hoses and fluids. This approach minimizes the risk of future leaks or tensioner wear that could necessitate repeat work soon after a belt change.
Chain-driven WRX (FA-series) replacement policy
Modern WRX models powered by FA-series engines use timing chains rather than belts. There is no official mileage-based replacement interval for these chains. Instead, maintenance focuses on wear- and condition-based checks of the chain, tensioners, guides, and related components, typically at regular service intervals.
- There is no fixed clock for timing-chain replacement; consult the owner’s manual for service recommendations tied to mileage and condition.
- Listen for chain rattle or slur noises on cold starts or at idle, which can indicate tensioner or chain wear needing inspection.
- Have tensioners and guides inspected around high-mileage milestones (roughly around 100,000 miles or more) and replace only if wear or failure is detected.
- High‑mileage engines, aggressive driving, or extensive engine work can increase the likelihood of chain-related issues; discuss preventive maintenance with a qualified Subaru technician.
In practice, chain-driven WRX engines are designed to last many miles, but there is no universal replacement interval. Regular inspections and prompt attention to unusual noises are the best ways to avoid unexpected failures.
Maintaining a chain-driven engine
To minimize risk, adhere to your dealer’s recommended service schedule, ensure proper oil changes with the correct viscosity, and address any abnormal noises or performance changes promptly. A well-maintained chain-driven WRX that is kept within service guidelines can deliver reliable miles without a mandated timing-chain replacement.
Summary
In short, belt-driven WRX models should plan for a timing-belt replacement around 105,000 miles or eight years, with water pump and related components replaced concurrently. Newer WRX models that use timing chains do not have a fixed replacement interval; maintenance focuses on inspection and timely replacement of worn chain components if needed. Always confirm engine type and recommended service intervals in your owner’s manual or with a Subaru dealer, and stay attentive to signs of wear or unusual noises.
How much does it cost to replace a timing belt on a 2018 WRX?
$409 to $919
Belts themselves aren't that expensive. The real cost is in the labor, because a lot of parts need to be disassembled to get to the belt. Shopping around to get a few quotes is your best bet to get the best deal, but you can expect to pay anywhere from $409 to $919 (including parts and labor).
How do I know if my Subaru needs a new timing belt?
A failing timing belt may show a myriad of symptoms, such as noises coming from the front of the vehicle, engine misfires, and decreased engine performance. In many situations, if the timing belt breaks, the engine will no longer run, and the engine will not restart without replacing the timing belt.
When to change Subaru WRX timing belt?
Timing belt replacements:
Subaru timing belts need to be replaced after seven years or 105,000 miles; whichever comes first.
At what mileage should timing belts be replaced on a VW?
The VW cambelt change interval typically ranges from 60,000 to 100,000 miles, depending on the model and year, but it's essential to check the owner's manual for your specific vehicle. Some manufacturers also recommend replacement based on a time limit, such as every 5 to 10 years, whichever comes first.
Factors to consider
- Vehicle-specific recommendations: The exact interval depends on your car's model, engine, and age.
- Time vs. mileage: It is crucial to replace the belt according to the time-based schedule if the mileage is not reached, as the belt can degrade over time even without regular use.
- Consult your manual: Always refer to your owner's manual for the most accurate schedule for your vehicle.
- Engine type: Different engines have different intervals. For example, some 1.8T models may have a 75,000-mile interval, while some 2.0L Turbo FSI models might have a 90,000-mile interval.
- Other components: It is often recommended to replace the water pump at the same time as the cambelt, as it is driven by the belt and can fail if not replaced.
Why replacement is important
- Prevent engine damage: A broken cambelt can cause severe and expensive damage to your engine.
- Proactive maintenance: Replacing the belt at the recommended interval is a proactive measure to prevent catastrophic failure.
