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Choosing the right Scion xD timing belt matters because the belt controls valve timing and directly affects engine reliability. A failure can cause extensive engine damage and unexpected downtime, so selecting a durable, correctly sized belt is important. This guide presents our shortlist of the top options for Scion xD timing belt fitment and durability, each selected for long service life and appropriate compatibility. We evaluated candidates on material construction, dimensional accuracy, and expected maintenance intervals to help you pick a belt that matches your needs. Read on to see the top picks and the factors you should weigh before replacing the timing belt.
Looking for other parts? See all Scion xD parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Gates PowerGrip Premium Timing Belt Component Kit |  |
| Most Popular A crowd favorite that many people choose with confidence | Nakuuly Timing Belt Kit with Water Pump (Timing Belt Kit) |  |
| Best Quality Built to a higher standard if you want something more solid | AISIN TKH-002 Timing Belt Kit with Water Pump |  |
| Best Budget The cheapest option that still gets the job done reliably | Dayco 95329 Timing Belt |  |
| Most Sold A high-volume bestseller chosen again and again | A-Premium Timing Belt Kit with Water Pump (fits select Honda/Acura 3.0–3.7L V6) |  |
| Best Value for Money The sweet spot between price and what you get | Gates Premium Automotive Timing Belt (T304) |  |
| Best Overall The best all-around choice for most situations | AISIN TKT-026 Timing Belt Kit with Water Pump |  |
1. Gates PowerGrip Premium Timing Belt Component Kit
| Manufacturer | Gates |
|---|---|
| Model | PowerGrip Premium Timing Belt Component Kit |
| Manufacturer Part Number | TCK014 |
| Item model number | TCK014 |
The Gates PowerGrip Premium Timing Belt Component Kit provides a full timing-system solution meant to replace factory components during a timed-service job on a Scion xD. It bundles the toothed timing belt with idler(s), tensioner(s), and the small hardware needed to complete a single job, plus installation notes and technical bulletins for tricky applications. In practice that means fewer parts to source and a straightforward one-stop swap when you are replacing the belt and related items at recommended intervals. Gates positions this kit as factory-quality and built for durability, which aligns with a reliability-focused approach to maintenance. Some users report strong fit and long service life, though there are occasional reports of a failed tensioner pin on a small number of units, so inspect moving components on receipt. For DIYers or technicians working on a Scion xD, the kit simplifies the parts list and reduces the chance of missing an item during reassembly, but if you need a tensioner-only or non-standard aftermarket performance part this all-in-one kit may include components you do not require.
Best for: Reliability-focused buyers who prefer a single factory-quality kit to fully renew the timing system and minimize future comebacks; ideal when performing scheduled timing-belt service on a Scion xD.
Less Ideal for: Buyers seeking a single replacement part, a specialty performance timing solution, or a bespoke parts selection should consider alternatives instead of a full OEM-style kit.
- Full kit includes belt, tensioner(s), idler(s) and supporting hardware for a complete timing-system service
- Factory-quality design aimed to match or exceed original factory service life
- Includes installation instructions and technical service bulletins to help with tricky applications
- Simplifies parts sourcing and reduces the chance of missing components during a Scion xD timing job
- Occasional reports of tensioner hardware failures on a small number of units, so inspection at installation is advisable
- Kit contents may include parts not needed if you only require a single replacement component
Verdict A convenient, factory-quality complete timing kit that simplifies a Scion xD timing replacement for reliability-focused owners, but check tensioner hardware on delivery.
2. Nakuuly Timing Belt Kit with Water Pump (Timing Belt Kit)
| Brand | Nakuuly |
|---|---|
| Material | Cast Iron |
| Vehicle Service Type | Car |
| Automotive Fit Type | Vehicle Specific Fit |
This Nakuuly timing belt kit bundles the timing belt, water pump, hydraulic tensioner, idler pulleys, cam and crank seals, and a serpentine belt into a single parts package to complete a timing service. It is intended for vehicle-specific engine applications and is typically used during scheduled timing-belt service to replace worn belts and the often-recommended water pump at the same time. The kit’s practical benefit is convenience: you get most of the items needed for a timing job in one box, which simplifies parts sourcing and reduces garage downtime. Several buyers report straightforward fitment and solid short-term performance, while some professionals have raised concerns about the quality of the pump and tensioner on a few units, so careful inspection at installation is wise. Expect to save time and avoid multiple orders, but be prepared to verify critical components before installation or to replace an underperforming tensioner or pump if needed.
Best for: Buyers who prioritize convenience and want a one-box solution to complete a timing belt and water-pump service quickly with minimal parts hunting.
Less Ideal for: Users seeking premium, guaranteed long-term OEM-level durability or professional shops that prefer sourcing individual high-end components should consider higher-grade alternatives.
- Comprehensive kit includes timing belt, water pump, hydraulic tensioner, idlers, seals, and serpentine belt so you receive most parts needed for a timing service.
- Vehicle-specific fit reduces parts-compatibility guessing and streamlines installation for matching engines.
- Short-term user reports show many successful installs and quick return-to-service without leaks.
- Seller-stated customer support for replacement or installation questions can simplify post-purchase help.
- Some units show inconsistent quality for the water pump and tensioner, which may require replacement with a higher-grade part.
- Mixed long-term durability reports mean lifespan may vary compared with factory-quality components.
Verdict A convenient, all-in-one timing belt and water pump kit that saves time and reduces ordering hassle but requires inspection of the pump and tensioner for long-term reliability.
3. AISIN TKH-002 Timing Belt Kit with Water Pump
| Brand | AISIN |
|---|---|
| Material | Aluminum, Ceramic |
| Manufacturer | Aisin |
| Automotive Fit Type | Vehicle Specific Fit |
| Position | Center |
This AISIN TKH-002 kit packages the timing belt change and water pump replacement into a single box so you can do both jobs at once. It is intended for a timing-service overhaul: installers remove the old belt, replace the belt, tensioner, idler pulleys and water pump, fit the supplied gasket, then torque components to the vehicle-specific specs using the included instructions. Notable features are OEM-matched components from recognized suppliers and an Aisin diecast water pump with carbon ceramic seal for long life and reduced risk of coolant leaks. For someone focused on engine performance and longevity, the kit reduces downtime and avoids mixing part quality by supplying matched components. The main limitation is fitment: this kit is sold for specific Honda and Acura engines and must be verified for your vehicle application before purchase, and the job still requires mechanical skill and some specialty tools to remove the crank pulley and set timing correctly.
Best for: Performance-oriented buyers who prioritize factory-quality replacements and want matched components to protect engine timing and cooling systems during a service interval.
Less Ideal for: Casual DIYers without experience on interference engines or anyone who prefers paying a shop to handle timing belt and water pump replacement end-to-end.
- Complete kit includes water pump, timing belt, tensioner, idlers, gasket and installation instructions for a single-box service.
- OE-matched components from known suppliers provide factory-quality fit and finish comparable to factory replacement parts.
- Diecast aluminum water pump with carbon ceramic seal improves durability and lowers leak risk compared with generic pumps.
- Compatibility is vehicle- and engine-specific so you must confirm exact fitment before selecting this kit.
- Installation is a medium- to high-difficulty job that typically requires specialty tools and careful timing procedures.
Verdict Buy this kit if you want factory-quality, matched timing components and a durable water pump for a full timing-service job; skip it if you cannot confirm exact engine fitment or lack the tools and experience to install it correctly.
4. Dayco 95329 Timing Belt
| Brand | Dayco |
|---|---|
| Model | Timing Belt |
| Manufacturer Part Number | 95329 |
The Dayco 95329 is a straightforward timing belt intended for routine timing system service on compatible engines. It replaces the factory belt and is used during scheduled maintenance or when the original belt shows wear. The belt follows conventional tooth-profile design and is packaged as a single replacement part, making installation familiar to any mechanic replacing a worn timing belt. Practically, its value lies in delivering a factory-style fit at a lower cost than some premium aftermarket options, which helps keep maintenance bills down on older Scion xD engines. The limitation is that this is a basic replacement part without bundled tensioners, idlers, or installation hardware, so buyers should plan to install or replace supporting components separately. Expect typical belt longevity for a budget-grade replacement when installed correctly and inspected per service intervals.
Best for: Budget-conscious owners focused on keeping maintenance costs down on a Scion xD while retaining a factory-style replacement part for regular service.
Less Ideal for: Drivers planning a comprehensive timing job who want a complete kit with tensioners and idlers included or those seeking premium long-life belt options.
- Factory-replacement design suitable for direct timing belt swaps
- Simple single-part packaging keeps initial cost low
- From a reputable belt manufacturer with long automotive parts history
- Fits standard timing belt replacement workflows used by professional shops
- Sold as the belt only without tensioners, idlers, or seals
- No advanced materials or extended-life claims compared with premium belts
Verdict A wallet-friendly, factory-style timing belt for Scion xD owners who need a straightforward replacement but will source tensioners and idlers separately.
5. A-Premium Timing Belt Kit with Water Pump (fits select Honda/Acura 3.0–3.7L V6)
| Material | HNBR |
|---|---|
| Automotive Fit Type | Vehicle Specific Fit |
| Position | Front |
This A-Premium timing belt kit supplies everything needed for a full timing-belt service: timing belt, serpentine belt, water pump with gasket, tensioner, idler pulleys, hydraulic tensioner and main seals. In practice the kit is used during a scheduled timing belt job where replacing the water pump and tensioning components at the same time reduces future labor. The belt is made from HNBR, which the seller highlights for heat and wear resistance, and customers frequently report straightforward fit and quiet operation after installation. The convenience of bundled parts and a matching water pump simplifies sourcing and can shave hours compared with ordering components separately. Limitations to note are that the kit is a vehicle-specific aftermarket replacement rather than a factory part and some users reported occasional early water-pump leaks in isolated cases, so careful pre-install inspection and proper torqueing are important. Also fitment must be checked against your vehicle before purchase because this kit targets specific engines and years.
Best for: Practical optimizers who prioritize getting a full, ready-to-install service kit that reduces repeat labor and parts hunting when doing a timing-belt job.
Less Ideal for: Buyers seeking guaranteed factory-original parts or those unwilling to inspect aftermarket components before installation should consider alternatives.
- Complete kit includes timing belt, serpentine belt, water pump, tensioner and seals for one-stop servicing
- HNBR timing belt material claims improved heat, chemical and wear resistance compared with generic rubber belts
- Multiple pulleys and hydraulic tensioner included reduce the need to source extra parts
- Customers report good fitment and quieter engine operation after installation
- Not a factory part so component fit and long-term durability can vary compared with OEM replacements
- A small number of users reported water pump leakage requiring attention after installation
Verdict A budget-friendly, full timing-belt service kit that streamlines a complete repair but requires inspection since it is an aftermarket replacement.
6. Gates Premium Automotive Timing Belt (T304)
| Brand | Gates |
|---|---|
| Model | Premium Automotive Timing Belt |
| Manufacturer Part Number | T304 |
| OEM Part Number | 13028AA181, 13028AA230, 13028AA231, 32005535, OHC304 |
This Gates T304 timing belt is a direct-style replacement intended to restore cam-crank synchronization on compatible engines. It is used when replacing a worn or aged timing belt during routine maintenance or engine service and includes alignment marks to simplify correct installation. The belt uses HNBR rubber and aramid-reinforced nylon backing for improved heat and wear resistance, and PTFE-infused surfaces to reduce frictional loss. In practice that means longer service life and smoother operation compared with generic belts, and many installers report straightforward fitment and accurate timing marks. The belt is sold as the belt only, so you should plan to inspect or replace pulleys, tensioner, and water pump as needed since those items are not included. A few isolated listings report damaged or missing timing marks on arrival, so check the belt before you start the job. For a practical owner who wants a factory-quality replacement without buying a full OEM kit, this Gates belt balances durability and value effectively.
Best for: Practical optimizers who prioritize long-term reliability and cost-effective maintenance and want a factory-quality timing belt without buying a full parts kit.
Less Ideal for: Buyers who prefer all-in-one timing kits that include tensioners, pulleys, and water pumps should consider a full kit instead.
- Factory-quality design that matches fit and timing mark placement
- HNBR and aramid construction for heat and wear resistance
- PTFE-infused jacket reduces friction and tooth shear
- Well-known brand with broad vehicle coverage and long track record
- Sold as belt only so additional hardware must be purchased separately
- Occasional reports of damaged units or missing timing marks on delivery
Verdict A durable, factory-quality replacement belt that gives Scion xD owners practical, long-lasting value when only the belt needs replacing.
7. AISIN TKT-026 Timing Belt Kit with Water Pump
| Brand | AISIN |
|---|---|
| Material | Aluminum, Ceramic |
| Automotive Fit Type | Vehicle Specific Fit |
| Model | Timing Belt Kit with Water Pump |
This AISIN timing belt kit combines all the parts needed for a timed-drive system service: timing belt, water pump, tensioner, pulleys, gasket, and installation instructions in one box. It is intended for vehicle-specific replacement and includes factory-quality matched components from reputable suppliers, so installers get parts that fit and operate like the original equipment. The water pump uses a diecast aluminum housing and carbon ceramic seals for durability, and the kit is convenient for swapping both belt and pump in the same job to avoid duplicate labor. Typical use is a full timing service during scheduled maintenance or when replacing a failing pump or belt. Buyers should note the kit is vehicle-specific so fitment must be verified for the Scion xD application; some buyers reported missing small items on rare occasions, so check the box before starting work. For DIY mechanics and independent shops the kit saves sourcing time and reduces the risk of mismatched parts, while buyers seeking the absolute cheapest aftermarket option may find lower-cost alternatives elsewhere.
Best for: Balanced all-round buyers who value reliability and convenience when servicing the timing system and want a single, factory-quality kit that reduces the chances of parts mismatch.
Less Ideal for: Buyers who prioritize the lowest possible upfront cost or who need a generic universal kit for multiple different vehicles across a fleet.
- Complete kit includes timing belt, water pump, tensioner, pulleys, gasket and instructions so you can do the full service in one job.
- Factory-quality matched components from known suppliers to reduce fitment and compatibility issues.
- Durable water pump design with diecast aluminum housing and carbon ceramic seal for longer life.
- Saves time compared with sourcing individual parts and simplifies DIY or shop installs.
- Kit is vehicle-specific so incorrect engine/fitment selection will lead to incompatibility.
- Occasional reports of missing small components, so inventory the contents before starting the repair.
Verdict A comprehensive, factory-quality timing belt and water pump kit that streamlines a full timing service for buyers who want reliable, matched components.
Choosing the Right Scion xD Timing Belt: Key Factors to Consider
Material and Construction
The composition of the belt determines its resistance to stretching, heat, and oil contamination. High-quality belts use reinforced synthetic materials and robust tensile cords to maintain tooth profile under load.
A belt that resists deformation keeps valve timing consistent, which lowers the risk of engine performance loss or interference. Inspecting construction details helps you anticipate lifespan and maintenance needs.
Fitment Accuracy
Correct dimensions and tooth profile are essential for smooth engagement with the engine pulleys and sprockets. A belt that is even slightly off in width or tooth spacing can skip or wear unevenly, increasing failure risk.
Confirming exact fitment for the Scion xD engine avoids installation issues and ensures the timing system functions as intended without additional modifications.
Included Hardware and Kit Completeness
Many replacements are sold as kits that include tensioners, idlers, and seals. Having properly matched hardware reduces the chance of premature failure caused by worn ancillary components.
Assess whether a kit contains all necessary parts for a full service, because replacing the belt while leaving aged tensioners or guides in place can undermine the new belt’s lifespan.
Manufacturer Tolerances and Quality Control
Tight manufacturing tolerances mean consistent belt dimensions and reliable performance across production batches. Brands that publish tolerance specifications and quality checks give better assurance of uniform parts.
A well-controlled production process reduces the variance that can lead to uneven wear or early failure, which is particularly important for timing components under precise mechanical stress.
Resistance to Heat and Fluids
Engine bays expose belts to high temperatures and potential oil or coolant contact. Materials engineered to resist thermal degradation and chemical exposure will last longer under real-world conditions.
Choosing a belt rated for heat and fluid resistance helps maintain timing accuracy over the recommended maintenance interval and reduces the chance of unexpected breakdowns.
Recommended Maintenance Interval and Serviceability
Understand the suggested replacement interval and how easy the belt is to access during service. A belt with a clearly stated maintenance interval allows you to plan preventative replacement and avoid running beyond safe limits.
Also consider how straightforward the installation is for your service routine, since easier serviceability can lower labor time and the chance of installation errors.
FAQ
How often should I replace the Scion xD timing belt?
Replacement intervals depend on the belt material and manufacturer recommendations, but you should follow the vehicle manufacturer’s suggested schedule where available. Many belts are designed to last a set number of miles or years, so consider both mileage and time when planning replacement.
What symptoms indicate the timing belt may be failing?
Common signs include unusual engine noises from the timing cover area, rough idling, or loss of power. You may also notice difficulty starting or misfires that appear intermittently. These symptoms often warrant immediate inspection to avoid more serious engine damage.
Can I replace just the belt or should I replace other parts too?
It is usually advisable to inspect and often replace associated components such as tensioners, idler pulleys, and seals during a timing belt service. These parts wear alongside the belt and can cause premature belt failure if left unchanged.
How long does a timing belt installation typically take?
Installation time varies with engine layout and service experience, but a timing belt job can take several hours to a full day for most DIYers or technicians. Allow extra time for removing accessory components and ensuring correct timing alignment.
Are there maintenance steps to extend timing belt life?
Regular inspections for signs of wear, keeping the engine free of oil leaks, and following recommended service intervals help extend belt life. Addressing engine oil or coolant leaks promptly will reduce chemical exposure that accelerates belt degradation.
Is a timing belt different from a timing chain for the Scion xD?
Timing belts and timing chains perform the same basic function but differ in materials and maintenance needs. Timing belts are typically quieter and require periodic replacement, while chains are metal and may have longer service lives but different failure modes. Confirm which system your vehicle uses before planning service.
How We Chose the Best Scion xD Timing Belt
We focused on belts that match the Scion xD engine specifications and offer proven material durability. Key criteria included tensile strength and tooth-profile stability, dimensional and fitment accuracy to ensure correct engagement with pulleys, recommended maintenance interval compatibility with the vehicle, and resistance to heat and oil exposure common in engine bays. We also considered the quality of included hardware when sold as a kit, such as tensioners and idlers, plus documented manufacturing tolerances. We excluded options that did not specify clear fitment for the Scion xD, belts with unclear material specs, and items lacking documented quality control or manufacturer specifications. Our selection prioritized belts that reduce risk of premature wear and minimize fitment issues during installation, focusing on factors that matter for long-term engine timing reliability.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize a timing belt that matches the Scion xD’s specifications, uses durable materials, and comes with correct fitment tolerances. Include replacement of tensioners and idlers when appropriate to avoid undermining the new belt’s lifespan. Balance longevity, resistance to heat and contaminants, and clear manufacturer guidance on maintenance intervals. Choosing a belt with documented quality control and a complete kit can reduce installation issues and give greater confidence in long-term engine timing reliability.
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