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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 22 reviews
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Product Reviews
★★★★★ 5
Perfect inserts for a great price
Size: 20 x 20 inches, Style: 4 Pack, Size: 20 x 20 inches, Style: 4 Pack
Great inserts! (The cat’s judgement is of me, not the inserts)
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Hands down best hammock accessory
Color: Green, Size: Medium
Tried many, this pillow is perfect. Not too big, not too small. Soft yet supportive. It’s also well made and super comfy. Plus it packs up nicely. I’m a new Wise Owl convert, everything I’ve ordered so far has been excellent quality. Just wish they kept the colors consistent so it all matched (minor annoyance). You need this.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Comfy, soft, packable, and cool
Color: Green, Size: Small
I absolutely love this pillow. It's well constructed but not OVER constructed - it is soft, comfortable to my neck and head - very packable and stays pretty cool - like the 'other side' of the pillow. I also appreciate the stuff sack that Wise Owl sends with it. I was able to get this down into my right side of my Redwing 50 pocket. This thing fits everywhere and while some folks think its a luxury, when you get to be my age - comfort is something that you take for granted. I feel well rested after a night on this bad boy.
Shape always fluffs back out. I think it's a great value at the price point it is at compared to other pillows in this range. Very very durable, like all Wise Owl products I own. Easily fits snugly into the bag, and can mold around you depending on how you want to adjust it. I don't use a sleeping pad, just this for my neck support and it really is worth every penny.
Water resistance - I'm not sure as I've not had the opportunity to see it but I feel like with the material it is, water would probably bead off in light amounts.
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Reviewed in the United States on December 20, 2025
★★★★★ 4
It's comfy but not UL nor packs down well.
Color: Blue, Size: Medium
Don't get me wrong, overall this is a very good mini portable camping pillow that has slightly bigger length, width & thickness than most of the other name brand inflatable camping pillows that cost $20 extra, which is nice for having more pillow/support to work with while you sleep, & it being foam filled rather than inflated means you don't have to worry about it deflating on you overnight out in the wilderness where you likely don't have a backup!..
All that is great until it's time to pack it back up..
It doesn't compact down small, nor easily. You have to put a little elbow grease into tightly rolling it up like a burrito, 🌯
And even Then, it's still a bit of a fight to squeeze it back into it's compression sack, but Still winds up being a bulky bulgy chunk of space real estate in my pack, and if you're a serious hiker you know every ounce counts as well as every inch of space that's taken up by bulky gear.
I didn't consider returning or replacing it for something else until wayy past the return window.
Again, it's not bad at all for your average travel or weekend camping trips, but for expedition, section or thru-hiking it's not the best choice to go with when budgeting weight & space in your pack.
I went with a similarly priced Teton camping pillow that is 18" by 12", also filled not inflated so it's basically the same thing but ever so slightly smaller in circumference, yet packs down noticably easier & more compact, weighing slightly less & taking up noticably less space in your pace as well.
I can easily stuff it in the outer back kangaroo pouch on my Osprey Atmos AG 50L.
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Reviewed in the United States on January 28, 2025
★★★★★ 5
Soft and Confortable
Color: Rose, Size: Medium
Excellent travel and camping pillow. Soft and confortable. My wife loves it.
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Reviewed in the United States on May 26, 2026