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Description
Water Pump for Hyundai ix35, Sonata, H1 & Kia Sportage, Optima Theta II (WA037)Vehicle Fitment & Part Details The WA037 water pump (OE ref. 25100 2G500) is a direct replacement for Hyundai ix35, Tucson, Sonata, H1 and Kia Sportage, Optima, Sorento models fitted with the Theta II engine family (G4NA, G4KE, G4KC, G4KD, G4KG, G4KJ). Features a 6 blade impeller. The water pump circulates coolant through the engine cooling system. Always confirm the OE number against your vehicle before ordering. Key Details SKU WA037 Component Water
Vehicle Fitment & Part Details
The WA037 water pump (OE ref. 25100-2G500) is a direct replacement for Hyundai ix35, Tucson, Sonata, H1 and Kia Sportage, Optima, Sorento models fitted with the Theta II engine family (G4NA, G4KE, G4KC, G4KD, G4KG, G4KJ). Features a 6-blade impeller. The water pump circulates coolant through the engine cooling system. Always confirm the OE number against your vehicle before ordering.
Key Details
- SKU
- WA037
- Component
- Water Pump
- Brand
- Partquip
- Primary Fitment
- Hyundai ix35 / Kia Sportage III
Key Benefits
- Direct OE-equivalent replacement with 6-blade impeller for the Hyundai/Kia Theta II engine family
- Covers Hyundai ix35, Tucson, Sonata, H1 plus Kia Sportage, Optima and Sorento 2.0–2.4 petrol models from 2009 onward
- Single pump fits multiple Theta II variants (G4KD, G4KE, G4KC, G4KJ, G4NA)
Product Specifications
| Specification | Details |
|---|---|
| Number of Blades | 6 |
OEM Reference Numbers
- Hyundai / Kia: 25100-2G500, 251002G650, 251102G500
Vehicle Fitment
| Make | Model | Engine | Years |
|---|---|---|---|
| Hyundai | H1 2.4 MPi | G4KC / G4KG | 2009– |
| Hyundai | ix35 2.0 / 2.4 | G4NA / G4KE | 2010–2017 |
| Hyundai | Sonata 2.4 / 2.4 GDi | G4KC | 2010–2016 |
| Hyundai | Tucson (JM) 2.0 | G4NA | 2010–2015 |
| Kia | Optima 2.4 / 2.4 GDi | G4KJ | 2012– |
| Kia | Sorento 2.4 | G4KE | 2015– |
| Kia | Sportage III 2.0i | G4KD | 2010– |
| Kia | Sportage III 2.4i | G4KE | 2010– |
Fitment Notes
- Always verify the OE part number stamped on your existing water pump before ordering. Fitment data is provided as a guide and may not cover every sub-variant.
- The Theta II engine family spans 2.0–2.4 L in naturally aspirated and GDi configurations. All variants listed share this water pump.
Installation / Use / Maintenance Tips
- Drain the cooling system completely before removing the old water pump to minimise coolant loss and contamination.
- Clean all gasket mating surfaces thoroughly — do not reuse old gaskets or seals.
- Inspect the thermostat, radiator hoses and drive belt while the pump is accessible; replace any worn components at the same time.
- Refill with the manufacturer-recommended coolant type and concentration, and bleed all air from the system before starting the engine.
- Run the engine to operating temperature and check for leaks around the pump housing, hose connections and bleed points.
Common Questions
- Will this water pump fit my vehicle?
- Check the fitment table above and confirm the OE reference number matches the one on your current water pump. If your vehicle and engine code appear in the table and the OE number matches, this pump is a direct fit.
- What do the OEM reference numbers mean?
- OEM (Original Equipment Manufacturer) reference numbers are the part numbers assigned by the vehicle manufacturer. They let you cross-reference this aftermarket part against the original to confirm compatibility.
- Is Partquip the same as MAP Pro?
- No. Partquip is an independent aftermarket brand. MAP Pro is the house brand of Modern Auto Parts. Both are available in our store, but they are separate brands with their own product lines.
- Are there other variants of this water pump?
- This listing covers SKU WA037 for Theta II engines. For Gamma-family engines (1.4–1.6 L), see WA035 or WA036. Search “water pump” in our store for more options.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1556 reviews
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Product Reviews
★★★★★ 5
Kona Air Filter
Size: 9.33" x 6.29" x 2.08"
Very satisfied, it fit perfectly!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
★★★★★ 5
Engine air filters are important!
Size: 8.26" x 5.63" x 2.24"
Just like me and you breathing, your car performs better when it can breathe freely and cleanly.
My philosophy with an engine air filter is to replace with cheap and often. You can't control the quality of air coming into your system but you can control the filtering, so I'd rather replace the filter on an accelerated schedule with a cheap product than to invest into something more expensive and have it perform dirty for longer than it should.
For my Honda CRV 2024 Hybrid, this filter fits snuggly and performs well.
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Reviewed in the United States on December 1, 2025
★★★★★ 5
honda civic
Size: 17220-5AA-A00
Great item and price, well packed. Arrived as scheduled. They fit my Honda Civic Xle
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Good non OEM replacement filter
Size: 165465NA1C
I recently purchased the Forccord 2-Pack Engine Air Filter for my INFINITI QX50 (2025/2024-2019) and QX55 (2025/2024-2022), and overall, it’s a decent alternative to the OEM filter.
Pros:
Perfect Fit – Installed easily in my QX50 without any issues. Fits just like the factory filter.
Good Filtration – The material seems effective in trapping dust and debris, helping keep the engine clean.
Affordable 2-Pack – Great value compared to dealership prices, especially if you replace filters regularly.
Improves Airflow – Noticed a slight improvement in engine responsiveness and fuel efficiency.
Cons:
Not OEM Quality – The filter material feels a bit thinner and less sturdy compared to the original Infiniti filter.
May Not Last as Long – While it works fine now, I’m unsure if it will hold up for the same mileage as an OEM filter.
No Installation Instructions – Though easy to install, a simple guide would have been helpful for first-time users.
Final Thoughts
This Forccord air filter is a good budget-friendly replacement that fits well and performs decently. However, if you prioritize OEM durability and quality, you may want to stick with the original Infiniti filter.
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Reviewed in the United States on February 15, 2025
★★★★★ 5
Keeps your engine running
Size: 17220-5AA-A00
Fits well, fair price, does the job as promised
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026