Coolant Expansion Tank for BMW E46 1999-2006 OE Replacement
by Generic
Key Features
- ✔OE#:603-535. Replace OE#17137787039, 17111436413, 17117573781, 17132247553. Package Included: 1 coolant reservoir + 1 surge cap. (Notice: instruction is not included. Recommended you install under the guidance of professionals.)
- ✔Function: The coolant tank contains coolant fluid that is discharged from the cooling system attached to the engine. Pressure builds up and released when the coolant is hot and expanding through the radiator and when the engine cools down, the excess fluid flows back into the radiator from the coolant tank of your vehicle. If you are experiencing leaks, low level of coolant and overheating engine then you may have a problem with your coolant reservoir tank.
- ✔Compatible with: For BMW: 98-06 3 E46丨04-11 X3 E83丨2000 323Ci丨99-00 323i丨01-06 325Ci丨01-05 325i 丨2000 328Ci丨99-00 328i丨01-05 330Ci丨01-05 330i丨01-05 330Xi 丨06-08 X3 L6 3.0L丨04-05 X3. Please check the second main picture to confirm engine coolant reservoir whether compatible with your car.
- ✔High-quality: The coolant reservoir expansion recovery tank with cap is made from high quality plastic materials can withstand excessive heat and vibration, light and durable. While this is not a genuine OEM part, it is a direct replacement and good value.
- ✔After-Sales Service: We offer 24 hours customer service and 1 year product service, If you are encounter product installation, product quality and other problems, please feel free to contact us.
Product Details
- Brand
- Generic
- Category
- Expansion Tanks
- ASIN
- B0B455M2DP
Check if it fits your BMW
Coolant Expansion Tank for BMW E46 1999-2006 OE Replacement — Overview
A direct OE-replacement coolant expansion tank for the E46, cross-referencing BMW part numbers 17137787039 and 17117573781 among others, covering the full 1999 to 2006 production span across the 320i through 330i range. The E46 expansion tank is a known weak point - the plastic becomes brittle with age and heat cycling, leading to cracks and coolant loss that can spiral into overheating damage quickly. Replacing it proactively on any E46 with significant mileage is straightforward preventive maintenance. The kit includes a replacement surge cap, which should always be swapped alongside the tank.
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