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When your Scion xB needs consistent oil pressure and reliable lubrication, choosing the right oil pump matters. The pump controls oil circulation, protects bearings, and supports engine longevity during daily driving and occasional spirited use. Picking the wrong unit can lead to reduced protection or premature wear. This guide highlights our seven shortlisted Scion xB oil pump picks and explains the criteria used to evaluate them, including flow characteristics and construction quality. Read on for the factors that matter and what to expect during installation.
Looking for other parts? See all Scion xB parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | ADIGARAUTO M373 Engine Oil Pump for 2.4L Scion xB and Compatible Toyota Models |  |
| Most Popular A crowd favorite that many people choose with confidence | A-Premium Engine Oil Pump — Replacement for 2.4L Toyota/Scion Engines |  |
| Best Quality Built to a higher standard if you want something more solid | AISIN OPT-115 Matched Engine Oil Pump |  |
| Best Budget The cheapest option that still gets the job done reliably | BDFHYK M373 High-Pressure Engine Oil Pump (Replacement for 15100-28020) |  |
| Most Sold A high-volume bestseller chosen again and again | MOCA Timing Chain Kit with Oil Pump for 1.5L Toyota/Scion 1NZ-FE Engines |  |
| Best Value for Money The sweet spot between price and what you get | Vipcar Oil Pump for Toyota 2AZ-FE 2.4L Engine (Model 03032) |  |
| Best Overall The best all-around choice for most situations | AULINK Timing Chain Cover with Oil Pump (21350-2E740) |  |
1. ADIGARAUTO M373 Engine Oil Pump for 2.4L Scion xB and Compatible Toyota Models
| Brand | ADIGARAUTO |
|---|---|
| Material | Aluminum |
| OEM Part Number | M373, 15100-OH010, 15100-28020, 15100-0H060, OPTO96, OPTO44 |
| Item model number | AOPM373 |
This ADIGARAUTO M373 oil pump is a direct-fit replacement designed to restore proper oil pressure and flow in 2.4L engines used in vehicles like the Scion xB. It is typically installed when a failing pump causes low oil pressure, unusual noises, or engine wear; the kit includes the pump, drive shaft, gasket or seal, and mounting hardware to simplify installation. Constructed from aluminum and manufactured to match factory-style specifications, the pump aims to deliver consistent lubrication across operating conditions and reduce friction and wear on internal components. For a reliability-focused buyer, the appealing points are its claimed factory-spec manufacturing and included installation parts, which minimize trips to parts suppliers. Limitations are that fitment must be verified for exact engine variants and the listing does not include independent test data on flow or pressure performance, so buyers should confirm compatibility and consider professional installation if unsure. The pump is a practical replacement option when returning engine oiling to factory levels is the priority.
Best for: Reliability-focused owners who prioritize restoring factory-quality oil circulation and want a complete replacement pump kit that minimizes additional parts sourcing.
Less Ideal for: Buyers seeking documented performance benchmarks or those who prefer parts with published hydraulic test results and long-term field data.
- Designed to match factory specifications for 2.4L Toyota/Scion engines, reducing fitment uncertainty
- Includes pump, drive shaft, gasket or seal, and bolts for a more complete replacement package
- Aluminum construction intended for durability in high-temperature engine environments
- Aimed at restoring consistent oil pressure and circulation to protect engine components
- No independent flow or pressure test data supplied with the product listing
- Compatibility requires verification for specific engine variants before purchase
Verdict A practical, factory-spec replacement oil pump kit for 2.4L Scion xB engines that prioritizes fitment and restoring reliable oil pressure, but verify exact compatibility and consider professional installation.
2. A-Premium Engine Oil Pump — Replacement for 2.4L Toyota/Scion Engines
| Housing Material | Cast Iron |
|---|---|
| Volume Type | Standard Volume |
| Pressure Type | Standard Pressure |
| Mounting Hole Quantity | 3 |
This A-Premium oil pump is a direct replacement unit intended for 2.4L Toyota and Scion engines, including the Scion xB (2008–2015 2.4L). It circulates engine oil to keep internals lubricated and cooled and ships with an oil pickup screen and gasket or seal according to the listing. The housing is cast iron and the pump is described as standard volume and standard pressure with three mounting holes, so installation follows the factory mounting points and it should fit without major modification. For convenience-minded buyers the pump offers familiar bolt-on installation, broad vehicle fitment within the 2.4L family, and positive user feedback on functioning in rebuilt engines. Limitations to note are that this is an aftermarket replacement rather than a factory unit and the listing has at least one report of a missing gasket on arrival, so confirm the included parts before installation. If you need a straightforward, budget-friendly replacement pump for routine repair or an engine rebuild on a Scion xB, this unit covers the basic requirements.
Best for: Convenience-driven buyers who want a straightforward, bolt-on replacement to get a Scion xB back on the road quickly without expensive dealer parts or custom work.
Less Ideal for: Drivers who require factory-brand exact-match parts for warranty or high-performance engines should consider OEM or performance-specific pumps instead.
- Designed to fit 2.4L Toyota/Scion engines including Scion xB 2008–2015, matching factory mounting points
- Cast iron housing for durability under normal engine service conditions
- Ships with oil pickup screen and claims gasket or seal included in product description
- Standard-volume, standard-pressure design suitable for stock lubrication systems
- Aftermarket unit rather than factory-brand replacement which may differ slightly from factory spec
- At least one customer report of the gasket missing on delivery, so parts inclusion can vary
Verdict A practical, budget-friendly replacement pump that fits Scion xB 2.4L engines and restores stock oil circulation, but double-check included parts before installation.
3. AISIN OPT-115 Matched Engine Oil Pump
| Brand | AISIN |
|---|---|
| Model | OPT-115 |
| Position | Center |
The AISIN OPT-115 is an aftermarket oil pump engineered to match factory performance for the 1.5L Toyota/Scion engines used in select Scion xB models. It installs like a direct replacement and is intended to deliver the correct oil volume and pressure without adding excess mechanical load, which helps maintain lubrication to bearings, cam phasers, and other critical parts. Built in the same production process used for original components, the pump’s machined exterior and center position indicate a close fit to factory geometry and straightforward installation for mechanically competent owners or shops. The practical benefit is confident, long-term oil delivery that supports engine longevity after timing or top-end work. Limitations are that fit depends on specific engine variants, so buyers must confirm compatibility with their 1.5L 1NZ-FE engine and may still need a professional installation to ensure clearances and seals are correct.
Best for: Performance-oriented buyers who prioritize factory-quality replacement components to preserve engine reliability and pressure characteristics after repairs or upgrades.
Less Ideal for: Buyers looking for a universal or multi-engine aftermarket pump or those unwilling to verify exact engine fitment should consider other options.
- Factory-matched design for compatible Toyota/Scion 1.5L engines, easing fitment and performance expectations
- Engineered and manufactured using the same processes as factory parts for consistent quality and durability
- Delivers specified oil pressure and volume to maintain lubrication under normal driving conditions
- Compatibility depends on engine variant and model year so fit must be verified before purchase
- Requires proper installation and sealing; not a do-it-blindly part for inexperienced installers
Verdict A factory-matched replacement that restores correct oil delivery for compatible Scion xB 1.5L engines, provided you confirm fitment and install it properly.
4. BDFHYK M373 High-Pressure Engine Oil Pump (Replacement for 15100-28020)
| Fitment | Scion xB 2008-2015 2.4L L4 (listed) |
|---|---|
| Reference Part Numbers | 15100-28020, 15100-OHO10, 15100-OHO20, 15100-OHO60 |
| Material | Aluminum alloy and metal components |
| Volume/Pressure Type | High Volume, High Pressure |
This BDFHYK M373 oil pump is a budget-focused replacement intended to restore oil circulation and pressure for 2.4L Toyota-based engines, including the Scion xB models noted in the fitment list. It installs in place of factory oil pumps and is marketed as a high-volume, high-pressure unit constructed from aluminum alloy and other durable metals. In use it performs the core job of moving oil through the engine to maintain lubrication and reduce wear. Practical benefits include factory-style fitment to the listed OEM part numbers, a compact metallic build that resists corrosion, and included O-rings on some listings to simplify sealing during installation. Limitations are typical of value aftermarket parts: fitment must be verified against your vehicle and part numbers before purchase, and long-term durability may vary compared with direct factory replacements. Expect this pump to be a cost-effective repair option when you need to replace a failing pump on a Scion xB but plan for proper installation and post-install checks of oil pressure and leaks.
Best for: Budget-conscious owners who want an affordable, function-first replacement pump for routine repair of a Scion xB 2.4L engine and prioritize cost savings over sourcing a factory-brand part.
Less Ideal for: Those seeking an OEM-branded pump with factory-backed long-term reliability or buyers unwilling to verify fitment and perform professional installation should consider alternatives.
- Designed to match common OEM part numbers for direct replacement fit on listed 2.4L engines
- High-pressure, high-volume design to maintain oil flow and engine lubrication
- Metallic construction (aluminum alloy/cast/steel) for corrosion resistance and structural strength
- Aftermarket longevity and exact performance can vary compared with factory-brand pumps
- Fitment requires verification against your vehicle and the listed OEM part numbers before installation
Verdict A cost-focused replacement that restores oil circulation for the Scion xB 2.4L when verified for fitment, but expect variable long-term durability compared with factory-brand pumps.
5. MOCA Timing Chain Kit with Oil Pump for 1.5L Toyota/Scion 1NZ-FE Engines
| Fits engines | 1.5L 1NZ-FE (specified models) |
|---|---|
| Included components | Timing chain kit plus oil pump |
| Manufacturer | OELINE Auto Parts / MOCA AUTOPARTS |
| Manufacturer part number | TCK126YP |
This MOCA timing chain kit bundles the timing chain, link-belt design chain components and an oil pump intended for the 1.5L 1NZ-FE engine found in Scion xB models. It is used when performing a timing service or replacing a worn chain and oil pump together to restore proper valve timing and oil circulation. The kit emphasizes factory-quality fit by matching OEM part numbers and uses a link-belt style chain for long service life and quieter operation. Including the oil pump makes it a convenient single-purchase solution for a comprehensive timing service, reducing parts hunting and simplifying installation for a mechanically capable DIYer or shop. Limitations are that vehicle-specific fit must be confirmed before purchase and the kit assumes correct installation and timing setup; it does not include vehicle-specific labor or diagnostic adjustments. Buyers should also verify compatibility with the 2004–2005 Scion xB engine variant before installation.
Best for: Risk-averse mainstream buyers who prioritize replacing worn timing and oil pump components together to restore reliable, factory-like operation and avoid repeat repairs.
Less Ideal for: Buyers who prefer individual OEM-branded parts, need parts for a different engine variant, or want a plug-and-play swap without any mechanical adjustment should look elsewhere.
- Includes oil pump and full timing chain kit for a single-service replacement
- Link-belt type timing chain designed for quieter operation and extended durability
- Matches factory part numbers for straightforward fitment on the specified 1.5L engine
- Fitment covers specific 1.5L Toyota/Scion 1NZ-FE applications only, so wrong engine variants will not be compatible
- Kit quality depends on correct installation and proper timing setup which may require professional tools or experience
Verdict A convenient, factory-replacement style timing chain kit with oil pump for Scion xB 1.5L engines that reduces parts sourcing when you want a single comprehensive timing service.
6. Vipcar Oil Pump for Toyota 2AZ-FE 2.4L Engine (Model 03032)
| Brand | Vipcar |
|---|---|
| Material | Cast Iron |
| Vehicle Service Type | Car |
| Manufacturer | LOBAM MACHINERY |
This Vipcar oil pump is a direct-replacement style unit built for the 2AZ-FE 2.4L engine and intended to restore proper oil pressure and flow after wear or during an engine rebuild. It is typically used during engine overhaul or when diagnosing low oil pressure symptoms; installers bolt it into the factory location and connect the existing oil pickup and seals. Notable features include machined gearing and gerotor technology claimed to meet or exceed factory performance, plus testing for pressure, flow, temperature fatigue, and corrosion resistance. In practice that means the pump should provide predictable oil delivery without adding noticeable parasitic load and can help protect engine bearings when installed correctly. The pump's cast metal construction and pressure/flow testing are practical benefits for reliability in daily driving and moderate duty. Limitations are that fitment must be verified for the Scion xB's specific year and engine variant because multiple 2AZ-FE pump choices exist, and buyers should expect to reuse or replace gaskets and seals during installation since those items are not included.
Best for: Practical optimizers who want a budget-conscious replacement that aims to restore factory-quality oil delivery during an engine rebuild or repair on a Scion xB with the 2AZ-FE engine.
Less Ideal for: Buyers seeking a performance-upgraded or high-flow aftermarket pump for racing applications should look for purpose-built units instead.
- Engineered gear and gerotor machining to deliver consistent oil pressure and flow
- Undergoes pressure, flow, temperature fatigue, and corrosion tests for durability
- Cast metal construction aimed at matching factory-strength performance
- Vehicle-specific fit design simplifies installation when matched correctly
- Does not include gaskets or seals, which may need replacement during installation
- Multiple pump options exist for the 2AZ-FE so fitment verification is required
Verdict A cost-effective, tested replacement pump that aims to restore factory oil pressure on 2AZ-FE Scion xB engines provided you confirm the correct pump variant and replace seals during installation.
7. AULINK Timing Chain Cover with Oil Pump (21350-2E740)
| Model | Timing Chain Cover |
|---|---|
| Manufacturer Part Number | AUTCH449 |
| Item model number | 21350-2E740 |
| Applicable Engines | 2.0L fitments listed (Hyundai/Kia) |
This timing chain cover assembly from AULINK combines the timing chain cover and oil pump into a single replacement unit intended to restore oil circulation and protect timing components. It is typically used when the factory cover or oil pump has failed, or during an engine partial rebuild where the front cover is removed. The listing emphasizes precision fitment, function and leakage testing, and manufacture in TS16949 facilities, which suggests attention to quality control. Practical benefits include a one-piece replacement that can simplify installation versus sourcing separate parts, and customer feedback shows many users got working oil pressure and no leaks after installation. Limitations are mixed fit reports across vehicle fitments and a few reviews noting missing sensor bosses or minor bolt hole clearances, so careful verification of sensor and mounting locations is important before buying. Some users also reported oil pressure problems after install, which could indicate occasional quality or compatibility issues.
Best for: A balanced, all-round buyer who wants a single, factory-style replacement piece to simplify a front-end engine repair and prefers a tested aftermarket alternative to the factory unit.
Less Ideal for: Drivers seeking guaranteed direct fit for models not listed should avoid this part and choose a confirmed, vehicle-specific factory-quality replacement or consult a parts specialist first.
- Integrated oil pump and timing chain cover simplifies front-end repairs and reduces parts sourcing.
- Manufactured and tested in TS16949 facilities with claimed function and leakage testing.
- Precision fitment intended to protect timing components from debris and restore oil circulation.
- Multiple customer reports of successful installs with restored oil pressure and no leaks.
- Some buyers reported fitment mismatches such as missing sensor slots or incorrect bolt hole sizes.
- A few reviews describe oil pressure failures after installation, indicating inconsistent quality control.
- Not explicitly specified for Scion xB fitment so compatibility must be confirmed for that model.
Verdict AULINK's one-piece timing cover with oil pump is a convenient, tested aftermarket replacement for compatible 2.0L engines but confirm exact sensor and bolt locations for your Scion xB before buying.
Choosing the Right Scion xB Oil Pump: Key Factors to Consider
Flow Rate and Pressure Stability
Oil flow rate and pressure stability determine whether the engine receives adequate lubrication at idle, cruise, and higher RPMs. A pump that maintains consistent pressure helps protect bearings, camshafts, and valvetrain components across operating conditions.
Look for pumps with documented performance curves or manufacturer pressure ratings. Excessively high pressure can stress seals, while low pressure risks metal-to-metal contact. For a Scion xB, matching the pump's pressure characteristics to the engine's factory specifications or known safe ranges avoids reliability issues.
Build Materials and Internal Clearances
The materials used for gears, rotors, and housings affect wear resistance and thermal stability. Hardened steel or treated alloys for internal components will typically offer longer life under heat and contamination exposure.
Internal clearances influence volumetric efficiency and pressure generation. Tight tolerances can improve low-speed pumping but may be more sensitive to contamination. Choose a pump whose construction balances manufacturing precision with durability for typical driving conditions.
Sealing and Gasket Compatibility
Effective sealing prevents pressure loss and oil leakage, which are critical for maintaining system performance. Compatibility with the Scion xB's oil pump gasket seal surfaces and oil pan interfaces reduces the risk of seepage after installation.
Consider whether the pump includes a correctly profiled gasket or if an OEM-style seal is required. Proper sealing also reduces the chance of air ingress, which can cause cavitation and reduce pump efficiency.
Fitment and Installation Complexity
Pump fitment affects how easily the unit installs in the Scion xB engine bay and aligns with oil passages. A pump designed for direct bolt-on installation reduces labor and the chance of assembly errors.
Evaluate whether special tools, timing cover removal, or oil pan disassembly are required. Products that mirror the vehicle's original mounting and inlet geometry simplify installation and help maintain original oil pickup relationships.
Compatibility with Oil Viscosity and System Modifications
Oil pumps perform differently with varying oil viscosities and system changes such as upgraded oil coolers or pressure-relief adjustments. Ensure the chosen pump operates effectively with the oil grades you plan to use and with any common modifications to the Scion xB oiling system.
If you use thicker or thinner oils seasonally, verify the pump's pressure behavior across that range. Pumps intended for higher pressure applications should also be evaluated for their effect on relief valve operation and overall system balance.
Durability and Maintenance Considerations
Long-term durability is influenced by resistance to wear, tolerance to contamination, and serviceability. Pumps that allow inspection or have replaceable components can simplify maintenance when addressing wear or failures.
Consider the expected service life relative to oil change intervals and whether the pump's design eases diagnosis of oil pump noise or oil pressure issues. Robust designs help reduce the likelihood of premature oil pump failure signs appearing during normal use.
FAQ
What are common symptoms of a failing oil pump in a Scion xB?
Common symptoms of bad oil pump performance often include a drop in oil pressure on the gauge, unusual oil pump noise such as whining or rattling, and warning lights related to oil pressure. You may also notice increased engine wear indicators like metal particles in the oil during inspection. These signs usually warrant prompt diagnostic checks to confirm pump performance.
Can I use a different oil viscosity with a replacement pump?
You can often use different oil viscosities, but pump behavior will change with viscosity and temperature. Thicker oil can raise pressure readings, while thinner oil may lower pressure. Match the oil grade to the vehicle manufacturer recommendations and consider how any change affects pressure stability under typical driving conditions.
Is installation of a Scion xB oil pump a difficult job?
Installation difficulty depends on engine layout and whether ancillary components need removal. Some pumps require oil pan or timing cover access, which increases labor. If you are comfortable with engine service procedures and torque specifications, the job can be done with standard tools, but many owners prefer professional installation to ensure proper sealing and alignment.
What does oil pump noise indicate?
Oil pump noise, such as whining or grinding, can indicate internal wear, cavitation from air ingress, or low oil level issues. It often signals reduced pump efficiency or impending failure. Diagnosing the root cause typically involves checking oil level, pickup screen condition, and pressure readings to determine whether the pump or related components are at fault.
How long should a replacement oil pump last?
A replacement pump can last many years if properly matched to the engine, installed correctly, and used with clean oil and regular maintenance. Longevity depends on driving habits, contamination control, and thermal stress. Regular oil changes and attention to oil filter condition help maximize pump life.
How We Chose the Best Scion xB Oil Pump
Our selection focused on oil pumps that meet the specific mechanical and packaging needs of the Scion xB engine. We prioritized units with known compatibility to the vehicle's oiling passages and mounting points, robust internal clearances for stable pressure, and materials that resist wear under thermal stress. Key evaluation criteria included flow rate and pressure stability, housing and gear quality, sealing and gasket compatibility, ease of installation relative to the Scion xB service procedures, and long-term durability under typical driving loads. We excluded pumps that lacked clear technical specifications or did not fit the Scion xB engine layout. Pumps advertised only for racing without documented compatibility were also left out. The final list emphasizes pumps that balance reliable oil delivery, materials engineered for heat and contamination tolerance, and straightforward installation for technicians familiar with Scion xB service practices.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Scion xB oil pump, prioritize units that deliver the right balance of flow and pressure stability while matching the vehicle's sealing and mounting requirements. Consider material quality, internal tolerances, and how the pump performs with the oil grades you use. Weigh installation complexity and long-term durability against any marginal performance gains. A properly fitted pump that maintains consistent pressure and seals reliably will protect engine components and reduce the risk of oil-related failures.
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