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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 19 reviews
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Product Reviews
★★★★★ 5
The Perfect Sandal for Active Kids!
Size: 8 Toddler, Color: Navy
I recently purchased the Stride Rite 360 Boy's Paddy Sandal for my son, and I couldn't be happier with my decision! From the moment he slipped his feet into these sandals, I could tell we were both going to be very pleased.
Comfort & Fit: 5/5 - The Paddy Sandal has surpassed all expectations in terms of comfort and fit. The adjustable straps make it incredibly easy to get a snug, perfect fit for my son's feet, ensuring the sandals stay securely on, no matter how much running and jumping he does. The soles are cushioned just right, offering support without sacrificing flexibility, which is essential for a growing child.
Durability: 5/5 - Stride Rite has always been synonymous with quality, and these sandals are no exception. They've endured days at the park, sandy beaches, and endless pavement adventures, yet they show minimal wear and tear. The materials are top-notch, promising many more months of active use.
Ease of Use: 5/5 - For busy parents, the ease with which these sandals can be put on and taken off is a huge relief. The hook and loop closure is strong and stays in place, but it's simple enough for my son to handle on his own, fostering his independence.
Overall Experience: 5/5 - It's rare to find a shoe that ticks all the boxes for both parent and child, but the Stride Rite 360 Boy's Paddy Sandal does just that. They've been a fantastic investment in my son's summer wardrobe and overall comfort during his daily activities. I would highly recommend these sandals to any parent looking for a reliable, comfortable, and stylish option for their child. Stride Rite has outdone themselves once again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2024
★★★★★ 5
Great
Size: 8 Toddler, Color: Navy
Just as pictured and the padding is super comfortable, our 3 year old is rough on shoes but we love stride rite the quality it good and easy to clean perfect for wide toe area
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 5
Great toddler shoes!
Size: 6 Toddler, Color: Navy
Cute, comfy, practical and perfect for my toddler son
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 9, 2025
★★★★★ 5
Most comfy sandals my toddler owns
Size: 6 Toddler, Color: Navy
Very comfortable and true to size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
★★★★★ 5
Perfect toddler summer sandal!
Size: 6 Toddler, Color: Navy, Size: 6 Toddler, Color: Navy
My toddler loves them. Even though they are a little big for him (which I meant to buy a bigger size) the adjustable strap allows me tighten them enough so he doesn’t slide. Color goes with everything! Perfect summer shoe!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 9, 2025
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