Startseite » OUSIMY Electric Water Pump & Thermostat Assembly for BMW 328i 428i 528i X1 X3 N20 | OE 11517604027
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OUSIMY Electric Water Pump & Thermostat Assembly for BMW 328i 428i 528i X1 X3 N20 | OE 11517604027

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Fast & Reliable Shipping：

We understand that vehicle repairs cannot wait.

All OUSIMY orders are processed within 24 business hours after payment confirmation.

Shipping Options:

• Standard Shipping:
Delivery usually takes 7-15 business days depending on destination.

• Expedited Shipping:
Faster delivery options are available for customers who need their parts sooner.

• Tracking Information:
Once your order ships, tracking details will be provided by email.

Please make sure your shipping address is correct before completing your order.

Warranty Policy:

At OUSIMY, we stand behind the quality and reliability of our automotive parts.

All products include a 3-Year Limited Warranty.

The warranty covers:
• Manufacturing defects
• Product quality issues
• Failures under normal use conditions


If you experience any product issue, please contact our support team. We will provide assistance including troubleshooting, replacement, or other solutions.

Warranty does not cover:
• Incorrect installation
• Damage caused by accidents
• Improper use
• Normal wear and tear

30-Day Money-Back Guarantee:

Your satisfaction is important to us.

If you are not completely satisfied with your purchase, you can request a return within 30 days after receiving your order.

Return requirements:

• Product must be unused
• Product must be in original condition
• Original packaging should be included


If you receive an incorrect or defective item, please contact us first. Our team will help resolve the issue as quickly as possible.

Vehicle Fitment & Technical Support:

Not sure if this part fits your vehicle?

Our automotive support team is here to help you find the correct replacement part before placing your order.

We can assist with:

✓ Vehicle compatibility confirmation
✓ OEM / Part number verification
✓ Product selection assistance
✓ Installation questions


To help us confirm the correct fitment, please provide:

• Vehicle Make & Model
• Year
• Engine Type
• OEM Part Number (if available)
• VIN Number (optional)


Need help choosing the right part?

Click the chat icon in the bottom right corner and send us your vehicle information. Our team will help verify compatibility and recommend the correct replacement solution.

Beschreibung Versandinformationen Bewertungen (0)

OE Part Numbers: 11517604027

OUSIMY Electric Water Pump with integrated thermostat is a direct replacement assembly built for BMW N20 engine models including 328i, 428i, 528i, X1 and X3.

Product Basic Info: High-temperature resistant reinforced plastic housing paired with precision internal impeller and built-in thermostat. Mounted on the engine cooling circuit, compatible with N20 turbocharged engines. Fits BMW 328i, 428i, 528i, X1, X3 with N20 powerplant.

Core Advantages: Reinforced heat-resistant casing prevents cracking under extreme operating temperatures. Optimized impeller delivers stable coolant flow to maintain ideal engine temperature. Our upgraded sealing structure fixes the common leakage issue found in stock water pumps. Pre-assembled thermostat removes extra matching work and speeds up bolt-on installation without modifications.

Common Problems This Part Fixes: Eliminates coolant leaks, engine overheating, heater low heat, whistling or grinding noises from the pump, fluctuating engine temperature, and premature thermostat failure. Electric water pump failure is a widely known N20 engine factory defect that often leads to repeated replacements.

Matching OBD Fault Codes: P0128, P261A, P261B, P261C, P261D, P261E (Coolant Pump / Thermostat Malfunction Codes for BMW N20)

Shipping Benefit: Free shipping included. Fast dispatch from our warehouse, items ship out within 1–2 business days after payment confirmation.

Warranty & DIY Friendly: 90-day manufacturer warranty. Complete pre-assembled unit ready for installation, suitable for professional repair shops and DIY mechanics.

Fitment List:

  • BMW 328i N20
  • BMW 428i N20
  • BMW 528i N20
  • BMW X1 N20
  • BMW X3 N20

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