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- Description
- Fitment
- Warranty and Refund
- Reviews
The AISIN WPT-137 Engine Water Pump is built for application-focused coolant circulation, helping keep your engine's cooling system running as designed. Its direct-replacement configuration is intended to simplify removal and installation for technicians and DIY customers alike.
Choosing the correctly matched water pump—by vehicle, engine, position, and equipment—helps reduce installation delays and unnecessary returns. Whether you're maintaining your current vehicle or restoring proper cooling performance after wear, the WPT-137 is designed to support a straightforward service process. Always verify fitment details before ordering and follow proper installation procedures for best results.
Notes
Engine Water Pump Assembly
Features
- Application-specific design supports proper coolant flow through the engine cooling system
- Direct-replacement configuration helps make removal and installation more straightforward
- Precise matching by vehicle, engine, and position helps minimize returns and delays
- Supports reliable engine cooling system maintenance for technicians and DIY repairs
- Engineered as a service solution for correct system replacement, not general performance upgrades
Application Summary
2006 Lexus GS300 3.0L 2994CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS2006-2015 Lexus IS250 2.5L 2499CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS
2006-2017 Lexus IS350 3.5L 3456CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS
2007-2011, 2013-2015 Lexus GS350 3.5L 3456CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS
2007-2011, 2013-2018 Lexus GS450h 3.5L 3456CC -CID V6 DOHC 24 Valve Naturally Aspirated FULL HYBRID EV-GAS (FHEV)
2015-2018 Lexus RC350 3.5L 3456CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS
2016-2018 Lexus IS300 3.5L 3456CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS
2016-2018 Lexus RC300 3.5L 3456CC -CID V6 DOHC 24 Valve Naturally Aspirated GAS
Specifications
- Brand: AISIN
- Part Number: WPT-137
- Part Type: Engine Water Pump
- UPC: 4954514921305
- GTIN: 04954514921305
- Item Dimensions: 9.2000 x 18.0000 x 5.7200 IN
- Package Dimensions: 9.2000 x 18.0000 x 5.7200 IN
- Package Weight: 3.7600 PG
- Package Quantity: 1 EA
- Pulley Included: No
- Mounting Hardware Included: No
- Grade Type: Standard Replacement
- Fan Clutch Included: No
- Housing Material: Cast Aluminum
- Hub Height: 64.5
- Hub Height: 2.540
- Impeller Material: Stamped Steel
- Impeller Rotation: Reverse
- Includes Back Housing: No
- Installation Warnings: Yes
Interchange
- Gates: 44050
- Toyota: 16100-39436
- Toyota: 16100-39435
- NAPA: WPT137
Warranty
- Warranty Duration: 12 Months
- Warranty Mileage: 12000 Miles
Returns
30-Day Money-Back Guarantee
We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.
To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.
Return Requirements:
- Items must be securely packed in the original manufacturer's packaging.
- All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
- You must obtain and retain the tracking number for your return.
Non-Returnable Items:
- Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.
We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.
Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.
Warranty
Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.
This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.
Exclusions:
The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.
Warranty Claims Process:
- All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
- No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
- The buyer assumes all risk of damage resulting from improper installation.
All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.
Shipping
We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).
Shipping to Other Locations:
A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.
Order Processing & Tracking:
- Orders are shipped Monday through Friday, excluding holidays.
- Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
- A tracking number will be emailed within one business day after shipping.
If you do not receive a tracking number, please:
- Check your spam/junk folder.
- If it's not there, contact us via phone or eBay message for assistance.
International Orders:
Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.









