Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
If you drive a Subaru Impreza, keeping the engine timing system in good order is crucial to avoid costly engine damage and maintain smooth performance. Choosing the right timing belt kit matters because kits vary in the quality of the belt, the included tensioners and pulleys, and the completeness of the hardware you receive. This guide highlights the top shortlisted kits for the Impreza, based on the parts they include and the build quality buyers typically need.Below you will find the best picks for this vehicle and a clear explanation of the criteria used to evaluate them, including component completeness and durability. Read on to see which kits met our editorial standards and why those factors matter for routine maintenance.
Looking for other parts? See all Subaru Impreza parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | A-Premium Timing Belt Kit with Water Pump for Honda/Acura 3.0–3.7L V6 |  |
| Most Popular A crowd favorite that many people choose with confidence | Torchbeam Timing Belt & Water Pump Kit (fits Subaru Impreza 1999–2011) |  |
| Best Quality Built to a higher standard if you want something more solid | Subaru Genuine Timing Belt Kit with Pulleys and Tensioner |  |
| Best Budget The cheapest option that still gets the job done reliably | KAX Timing Belt Kit for Subaru Impreza and Select 2.5L Subaru Models |  |
| Most Sold A high-volume bestseller chosen again and again | IAG Performance Red Racing Timing Belt Kit with Billet Guide and OEM Idlers/Tensioner |  |
| Best Value for Money The sweet spot between price and what you get | JAVOUKA Head Gasket and Timing Belt Kit for Subaru 2.5L (EJ251/EJ253) |  |
| Best Overall The best all-around choice for most situations | AISIN Timing Belt Kit with Water Pump (TKF-004) |  |
1. A-Premium Timing Belt Kit with Water Pump for Honda/Acura 3.0–3.7L V6
| Material | HNBR |
|---|---|
| Automotive Fit Type | Vehicle Specific Fit |
| Position | Front |
| Manufacturer Part Number | APTBK033 |
This timing belt kit supplies everything needed to replace a worn timing belt and water pump in compatible V6 engines: timing belt, drive belt, water pump with gasket, tensioner, idler pulley, hydraulic tensioner and main seals. It is typically used during scheduled belt service or when the water pump fails, so having all parts in one box reduces parts sourcing and downtime. Notable features include an HNBR timing belt which the manufacturer says improves heat and wear resistance and a complete set of pulleys and seals to refresh the front-end drive components. Practical benefits are simplified installation with matched parts and the convenience of replacing the pump at the same time to avoid future labor duplication. Limitations are that fitment is vehicle- and engine-specific so you must confirm compatibility, and while many buyers report good durability, some users have reported occasional pump leakage indicating variability between units. Professional installation is recommended for correct timing and sealing.
Best for: A reliability-focused buyer who prioritizes replacing wear items with a full matched kit to minimize repeat labor and keep engine timing systems dependable.
Less Ideal for: Buyers looking specifically for Subaru Impreza fitment or a kit guaranteed for that model should choose a kit listed for the Impreza or consult a specialist; DIYers inexperienced with timing procedures should seek professional installation.
- Complete kit includes timing belt, water pump with gasket, tensioner, idler pulley, hydraulic tensioner and crank/cam seals
- Timing belt made from HNBR for improved heat and wear resistance compared with basic rubber belts
- Vehicle-specific kit reduces the risk of part mismatch and speeds up a scheduled service
- Multiple pulleys and seals included let you refresh all front-end components in one service visit
- Not listed specifically for Subaru Impreza so compatibility must be carefully verified for your vehicle
- Some buyers reported isolated water pump leakage after installation, indicating variable pump quality
- Manufacturer warranty details and long-term durability claims are limited in the listing
Verdict A convenient, reliability-minded complete timing kit with an HNBR belt and matching components, but verify exact fitment and accept some variability in pump quality.
2. Torchbeam Timing Belt & Water Pump Kit (fits Subaru Impreza 1999–2011)
| Vehicle fitment | Subaru Impreza 1999–2011 (confirm fitment) |
|---|---|
| Kit contents | Timing belt, tensioner assembly, idler bearings, water pump |
| Manufacturer | Torchbeam |
This Torchbeam kit supplies a timing belt, tensioner assembly, idler bearings, and a water pump intended to replace the factory components on compatible Subaru Impreza models. It is used during a scheduled timing service to restore proper cam and crank synchronization and refresh the cooling pump; the included parts let a DIYer or technician complete the common job in one visit instead of sourcing parts separately. Notable features advertised include OEM-grade matching parts, reinforced rubber belt construction and alloy pulleys for heat resistance, and a claimed longevity target beyond 100,000 miles. In practice that means a solid set of replacement components that fit without modification and can reduce noise and belt stretch when installed correctly. Limitations to note are that some buyers reported missing items in a few shipments, so inspect the kit on arrival and confirm the kit contains the specific tensioner, seals, and pump hardware required for your Impreza variant. Replacement seals or small fasteners may be needed in some cases.
Best for: Buyers who prioritize convenience and want a single, vehicle-specific kit that lets a home mechanic or shop complete a Subaru Impreza timing belt and water pump service in one job.
Less Ideal for: Anyone who requires factory-backed dealer warranty support or wants an aftermarket kit guaranteed to include every small seal and fastener without inspection should consider alternatives.
- Complete kit includes timing belt, tensioner assembly, idler bearings and water pump so you can perform the service in one visit.
- Manufacturer states OEM-grade matching components intended for a direct fit to vehicle-specific mounting points.
- Reinforced belt compound and alloy pulleys aimed at high-temperature durability to reduce premature cracking and stretch.
- Some customers reported missing parts on arrival, so the kit should be verified before installation.
- Manufacturer warranty details provided as a seller guarantee rather than long-term manufacturer coverage.
Verdict A convenient, vehicle-specific timing belt and water pump kit for Impreza owners that bundles the core parts needed for the job, but check the package on delivery for missing pieces.
3. Subaru Genuine Timing Belt Kit with Pulleys and Tensioner
| Manufacturer Part Number | 13028AA240 13033AA042 13073AA142 |
|---|---|
| Fits (listed) | 2004-2014 WRX; 2002-2014 Impreza (Turbo) 2004-2013 Forester Turbo; 2005-2013 Outback and Legacy Turbo |
| Item Weight | 5.96 pounds |
This is a genuine Subaru timing belt kit intended for turbocharged Subaru models and designed to replace the entire timing drive assembly during a scheduled service. The kit includes the OEM timing belt plus multiple idler pulleys, a cogged idler and the hydraulic tensioner, all sealed in Subaru packaging. For performance-oriented owners, using factory parts keeps cam and crank timing precise and avoids fitment headaches that can arise with aftermarket mixes. Installation is the same as a standard timing belt job and the complete kit means you get the matching components needed when swapping the belt. A small number of buyers reported occasional missing items in some shipments, so inspect the kit before starting work. This specific kit excludes 2002–2003 WRX applications and should be used only on compatible turbo Impreza years to ensure correct pulleys and tensioner fitment.
Best for: Performance-oriented Subaru owners who prioritize factory-spec parts and exact fitment when refreshing the timing system on a turbo Impreza to preserve engine response and reliability.
Less Ideal for: Buyers looking for a universal or economy aftermarket kit or those working on non-turbo Impreza variants should consider other kits tailored to their engine and budget.
- Includes genuine Subaru sealed parts for factory-quality fit and finish.
- Complete kit contains timing belt, multiple idler pulleys, cogged idler and tensioner for a single service job.
- Sold as a matched set to preserve correct timing geometry and reduce compatibility issues.
- Clear packaging and OEM part numbers simplify identification during installation.
- Not compatible with 2002–2003 WRX turbo models and requires verifying correct fitment for specific model years.
- Some buyers have reported missing components in isolated shipments, so contents should be checked on receipt.
Verdict If you want factory-spec reliability and correct fitment for a turbo Subaru Impreza timing service, this genuine Subaru kit is the safest performance-focused choice.
4. KAX Timing Belt Kit for Subaru Impreza and Select 2.5L Subaru Models
| Fitment | Subaru Impreza 1999–2011 2.5L |
|---|---|
| Includes | Timing belt, tensioner assembly, bearings, longer bolt |
| Manufacturer | KAX |
This KAX kit supplies the timing belt plus the associated tensioner and bearings needed when replacing the timing components on compatible Subaru 2.5L engines. It is intended for in‑garage or shop installation during a timing service and groups the belt with the tensioner assembly, multiple bearings and a longer bolt so you replace worn parts at once rather than sourcing each piece separately. The practical benefit is convenience and lower cost compared with buying each component individually, and the kit’s fitment notes list compatibility with Subaru Impreza 1999–2011 2.5L which simplifies selection for that car. Expect typical aftermarket limitations: some users report occasional fit or quality variation and a few reviews mention damaged parts on arrival, so inspect components before installation and torque fasteners to factory specs. For a budget buyer who wants a complete replacement set to get an Impreza back on the road without buying premium branded parts, this kit covers the essentials reliably when checked and installed correctly.
Best for: Budget-conscious Subaru owners seeking a ready-made timing component kit to perform a full timing service on a 2.5L Impreza and keep maintenance costs low.
Less Ideal for: Buyers seeking factory-quality or performance-grade components for long-term durability or high-mileage engines should consider OEM or premium aftermarket alternatives.
- Complete kit includes timing belt, tensioner assembly and multiple bearings so you replace all wear items at once.
- Listed compatibility with Subaru Impreza 1999–2011 2.5L simplifies fitment for that model.
- Lower cost option compared with purchasing OEM components separately.
- Some customers report occasional damaged parts on arrival indicating variable quality control.
- Aftermarket fit and finish may differ from factory-quality parts, requiring careful pre-install inspection.
Verdict A cost-focused, all-in-one timing belt kit for 2.5L Impreza owners who want a complete replacement set at a lower price, but inspect parts before install.
5. IAG Performance Red Racing Timing Belt Kit with Billet Guide and OEM Idlers/Tensioner
| Compatible engines/vehicles | Subaru EJ20 and EJ25 (WRX 2002-2014, STI 2004-2021, Legacy GT 2005-2012, Forester XT 2004-2013) |
|---|---|
| Included components | Timing belt, billet timing belt guide, idler pulleys, tensioner assembly, cog and small roller |
| Belt construction | Kevlar-reinforced with H-NBR rubber teeth |
This IAG Performance kit replaces the timing belt system on Subaru EJ20 and EJ25 engines (WRX, STI, Legacy GT, Forester XT) with a race-tested package intended to match factory fitment while improving durability. It includes IAG's Kevlar-reinforced red racing timing belt, a CNC-machined billet aluminum belt guide, OEM-quality idler pulleys, an OEM tensioner assembly, and related rollers and cogs. In everyday use the stronger belt and billet guide reduce the risk of belt stretch or skipping under higher heat and load, while OEM pulleys and tensioner help maintain reliable bearing life. The kit is aimed at owners who want a direct replacement that leans toward performance without sacrificing factory compatibility. Important limitations are that it is specific to EJ engines so fitment is limited to compatible Subaru models, and buyers should follow proper installation and torque procedures or have a shop install it since timing components are critical to engine health.
Best for: Risk-averse mainstream owners who prioritize reliability and a manufacturer-compatible replacement but want added durability from performance-oriented components.
Less Ideal for: Shoppers looking for a universal or multi-engine kit, or those who prefer cheapest possible parts for basic, low-mileage use should consider other options.
- Complete kit includes belt, billet guide, OEM-quality idlers, tensioner, and rollers for a full timing system refresh
- Kevlar-reinforced timing belt rated for higher strength and heat resistance than standard belts
- Billet CNC-machined aluminum belt guide provides a robust, adjustable replacement to reduce risk of belt skip
- Includes OEM-style tensioner and idler pulleys to preserve bearing life and long-term reliability
- Fitment is limited to Subaru EJ20/EJ25 applications and will not fit non-EJ engines
- Requires correct installation procedures or professional installation because improper setup can cause severe engine damage
Verdict A factory-compatible timing kit that upgrades belt strength and adds a billet guide for owners who want extra durability without sacrificing reliability.
6. JAVOUKA Head Gasket and Timing Belt Kit for Subaru 2.5L (EJ251/EJ253)
| Fitment | Subaru 2.5L EJ251/EJ253 (2006–2011 Impreza compatible) |
|---|---|
| Package contents | Full head gasket set, head bolts, timing belt kit, timing tools |
| Manufacturer | JAVOUKA |
This JAVOUKA kit bundles a full head gasket set, head bolts, and a timing belt kit intended for Subaru 2.5L engines with EJ251/EJ253 codes, covering Impreza and other compatible models from the mid-2000s. It is supplied as a complete service package so you can replace the head gasket and timing components in one repair session, and the included head bolts simplify reassembly. The listing highlights durable, wear-resistant materials and includes timing tools to aid installation. In practice this type of kit is useful for a DIY mechanic or an independent shop doing an engine overhaul or timing belt service where matching gasket and belt quality matters. Expect solid fitment for the specified engine codes and model years, but check VIN and engine code carefully before buying since Subaru engine variants are specific. The kit offers good value by combining many parts in one box, though some buyers report occasional minor mismatches on peripheral gaskets, so verify each gasket and component during mock-up before final assembly.
Best for: Practical optimizers who want a single packaged solution to do a thorough timing belt and head gasket service on a Subaru Impreza with a 2.5L EJ251/EJ253 engine, saving time sourcing parts.
Less Ideal for: Owners who require exact factory-original parts or those unwilling to verify fitment and mock-up all gaskets before final assembly should consider dealership or OEM-sourced parts instead.
- Complete kit includes head gasket set, head bolts, and timing belt components for a single overhaul
- Targets Subaru 2.5L EJ251/EJ253 engines used in mid-2000s Impreza models, reducing part-sourcing time
- Materials described as wear- and corrosion-resistant for longer service life
- Includes timing tools that help with alignment and make installation easier for experienced DIYers
- May include one or two peripheral gaskets that need adjustment or replacement for perfect fit
- Not a brand-specific factory replacement so fit should be confirmed against your VIN and engine code before installation
Verdict A cost-effective all-in-one gasket and timing belt package for Subaru 2.5L EJ251/EJ253 engines that saves parts-sourcing time but requires careful fit verification before installation.
7. AISIN Timing Belt Kit with Water Pump (TKF-004)
| Manufacturer | Aisin |
|---|---|
| Model | Timing Belt Kit with Water Pump |
| Includes | Water Pump, Timing Belt, Tensioner, Idler Pulleys, Gaskets, Instructions |
| Compatible Vehicles | Select Saab 9-2X and Subaru models including Impreza |
This AISIN timing belt kit bundles everything needed when replacing the timing belt and water pump on compatible Subaru Impreza engines, so you can tackle the job in one service interval instead of piecemeal purchases. The kit includes a Mitsuboshi timing belt, AISIN diecast-aluminum water pump with carbon ceramic seal, a hydraulic tensioner and idler pulleys from reputable OEM suppliers, and the necessary gaskets and instructions. In practice that means parts fitment is close to factory-spec, installation is simplified by clearly marked timing indicators, and you avoid mixing component ages that could shorten life. The water pump quality and matched bearings reduce the chance of early leaks or bearing noise, but the kit does not include a thermostat or certain small tools like a gap feeler or crank pulley holder, so plan to have those on hand. A minority of users report belt material or fit issues, so confirm you have the correct engine variant before ordering. For a balanced buyer seeking a near-factory replacement kit for an Impreza timing service, this is a practical, time-saving package.
Best for: A balanced, all-round buyer who wants a near-factory replacement kit to complete a full timing belt and water pump service on a Subaru Impreza with minimal parts hunting.
Less Ideal for: Buyers who prefer an all-in-one OEM-labeled Subaru kit with every small accessory included, or those unwilling to source a thermostat and any specialty tools separately.
- Includes matched components (timing belt, water pump, tensioner, idlers, gaskets) to complete a full timing service at once
- Many parts are from OEM suppliers and the water pump uses a diecast aluminum housing with carbon ceramic seal for durability
- Timing belt has clear timing marks which simplify correct installation
- Packaged as a single kit to reduce fitment guesswork and missing parts during repair
- Thermostat is not included so an additional part purchase may be necessary during service
- Does not include specialty tools such as a crank pulley holder or feeler gauges required for final adjustments
- Some isolated reports of belt stretching or material problems mean inspecting the belt before install is advisable
Verdict Aisin's complete kit offers near-factory matched parts to do the timing belt and water pump job right for Subaru Impreza owners who want a convenient, reliable service package.
Choosing the Right Subaru Impreza Timing Belt Kit: Key Factors to Consider
Belt Material and Construction
The belt itself is the core of any timing kit. Look for belts made from reinforced rubber compounds with strong tensile cords to resist stretching and heat degradation. Construction quality affects longevity and resistance to oil or coolant exposure.
A better-built belt reduces the risk of premature failure and helps the engine hold precise timing over many miles. Consider belts with clear specifications on tensile strength and recommended service life so you can plan maintenance intervals with confidence.
Tensioners and Idler Pulleys
Tensioners and idler pulleys control belt tension and routing, so their bearing quality and build matter a great deal. Bearings should be sealed and rated for the engine’s operating temperatures to avoid premature wear.
Failing or low-quality tensioners are a common source of timing system problems. Choose kits that include robust tensioning components and provide guidance on preloading or torque settings to support correct installation and long-term reliability.
Included Components and Completeness
Complete kits reduce the chance of leaving out critical parts during a timing service. Important inclusions often cover the belt, tensioner, idler pulleys, seals, and sometimes the water pump. Verify what is supplied so you do not need to supplement missing items at install time.
Completeness also affects labor planning. A kit that supplies all wear items lets you replace everything while the engine is already disassembled, lowering the risk of future failures from overlooked components.
Compatibility and Fitment Accuracy
Correct fitment to the Subaru Impreza engine variant is essential. Kits should specify exact engine codes or model years they support and provide part numbers that match OEM references where applicable. Mismatched parts can cause installation issues or improper routing.
Double-checking fitment documentation before purchase helps avoid returns and ensures the kit will align with the engine’s pulleys and mounting points. Accurate fitment also simplifies installation for professional technicians and experienced DIYers alike.
Manufacturer Documentation and Support
Clear installation instructions, torque specifications, and component diagrams can make a significant difference during a timing belt service. Good documentation reduces installation errors and helps ensure correct tension settings and pulley alignment.
Availability of customer support or technical resources adds confidence, especially if you encounter fitment questions or need clarification about included parts. Prioritize kits from manufacturers that publish detailed instructions and provide responsive technical help.
Durability, Warranty, and Long-Term Value
Durability includes both material longevity and the warranty the manufacturer provides. A reasonable warranty indicates confidence in component life and gives recourse if a part fails prematurely. Consider the balance between expected service life and the warranty terms.
Long-term value is about minimizing repeat labor and parts costs. Choosing a kit with higher-quality components and solid warranty coverage can reduce the likelihood of needing another timing service sooner than expected.
FAQ
How often should I replace the timing belt on a Subaru Impreza?
The service interval often depends on the engine and driving conditions. Many manufacturers recommend replacing the belt at specific mileage or time intervals to avoid failure. Consult the vehicle’s maintenance schedule and consider earlier replacement if the belt shows wear or the car operates in severe conditions.
Should a timing belt kit include a water pump for the Impreza?
Including a water pump can be a practical choice because the pump is often accessible when the timing system is disassembled. Replacing the pump at the same time reduces the chance of future coolant leaks or additional labor. Assess whether the kit includes a pump and whether the pump’s specifications match what the vehicle requires.
Can I replace the timing belt myself on a Subaru Impreza?
Many experienced DIYers can perform a timing belt replacement, but it requires mechanical skill, the right tools, and precise adherence to torque and alignment procedures. If you are uncertain about setting timing or access to special tools, professional installation reduces the risk of engine damage from incorrect timing.
What are signs the timing belt or tensioner is failing?
Common signs include unusual engine noises from the timing cover area, rough idling, or difficulty starting. You might also see oil leaks near the front of the engine where seals sit. If you notice such symptoms, inspect the belt and tensioners promptly to avoid potential engine damage.
Are aftermarket timing belt kits as reliable as OEM for the Impreza?
Aftermarket kits can be reliable when they use quality materials and match OEM specifications, but quality varies between manufacturers. Review component specifications, warranty terms, and installation documentation to assess whether a specific aftermarket kit meets the vehicle’s needs.
What tools and prep are needed before starting a timing belt replacement?
At minimum, expect to need a torque wrench, suitable sockets, a crankshaft holding tool or equivalent, and alignment tools or marks. Prepare a clean workspace and gather new seals and gaskets if they are not included. Having service manual torque specs and a step-by-step plan helps prevent mistakes.
How We Chose the Best Subaru Impreza Timing Belt Kit
We focused on components and compatibility specific to the Subaru Impreza engine layouts commonly serviced with timing belt kits. Key evaluation criteria included belt material and construction, the quality and bearing type of tensioners and idler pulleys, the inclusion of necessary seals and hardware, and documented fitment accuracy for Impreza engine variants. We also considered warranty coverage and manufacturer documentation that clarifies torque specs or installation guidance.Excluded items were partial kits that omit critical components such as tensioners, water pump, or mandatory seals, and products lacking clear fitment information for Subaru Impreza models. We filtered out suppliers without verifiable quality control documentation or minimal component descriptions. The resulting list prioritizes complete kits that reduce the chance of missed parts during a timing service and emphasize long-term durability and correct fitment for this vehicle.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a timing belt kit for a Subaru Impreza, prioritize component quality, completeness, and correct fitment for the specific engine variant. High-quality belts, sealed bearings in tensioners and pulleys, and comprehensive documentation reduce the risk of premature failures and installation errors.Balance durability and warranty coverage against the components included so you do not face additional labor to replace omitted parts. Focusing on these criteria will help you select a kit that supports reliable engine timing and long-term peace of mind.
Explore More:
- Check out all Subaru Impreza parts & accessories
- Explore Timing Belt Kits Maintenance & Repair Guides
- Explore Engine
- Browse all Auto Parts
