HomeBelts and Cooling > Radiators, Coolers and Related ComponentsRein EPK0125 Engine Coolant Reservoir Kit
Part #: EPK0125

Rein EPK0125 Engine Coolant Reservoir Kit

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⚙️ 23 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, X4 and X3
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Overview of Rein Engine Coolant Reservoir Kit EPK0125

The Rein Engine Coolant Reservoir Kit EPK0125 is designed specifically for BMW X3 and X4 models. This application-specific expansion tank kit ensures proper coolant management and system reliability under varying heat cycles.

Key Features of Rein Engine Coolant Reservoir Kit

  • Includes sensor and cap where applicable for complete installation
  • Manufactured from virgin plastic that meets or exceeds original equipment specifications
  • Resistant to cracking and wear caused by repeated heat cycles, preventing coolant leaks
  • Direct fitment design allows for straightforward replacement without modifications

Detailed Product Description

The Rein Engine Coolant Reservoir Kit (part number EPK0125) is engineered to maintain optimal coolant levels and pressure in BMW X3 and X4 vehicles. Constructed from high-quality virgin plastic, this expansion tank withstands thermal stress and resists cracking, which can occur due to constant engine heat cycles. The kit includes all necessary components such as the sensor and cap, ensuring compatibility and ease of installation. Its direct fitment design aligns precisely with factory mounting points, reducing installation time and effort.

Common Applications and Issues Addressed

  • Replacement of cracked or leaking coolant reservoirs in BMW X3 and X4
  • Resolving coolant overflow or low coolant warning light issues
  • Preventing engine overheating caused by coolant loss
  • Maintaining proper coolant pressure and system integrity
  • Upgrading worn or damaged expansion tanks to OE quality standards

Installation Notes and Tips

  • Ensure the engine is cool before beginning installation to avoid injury
  • Verify that the sensor and cap are properly connected and sealed
  • Check for any coolant leaks after installation and during initial engine operation
  • Follow vehicle-specific service manual instructions for coolant system maintenance

Quality Assurance and Warranty Information

Rein expansion tanks are produced to meet or exceed original equipment specifications, using durable virgin plastic materials. This ensures resistance to heat-related wear and cracking, contributing to long service life. The product is manufactured in China and undergoes quality control to maintain consistent performance. Warranty details should be confirmed with the point of purchase or manufacturer documentation.

BrandRein
Part NumberEPK0125
Application TypeApplicationSpecific
Container TypeBX
Country of OriginCN
Item Height8.7500
Item Length8.7500
Item Level GTIN843266077832
Item Qty1
Item UOMEA
Item Weight1.5100
Item Weight Unit UOMLB
Item Width7.0000
Link to Manufacturer Pagewww.reinautomotive.com
Product Desc Extended 240Rein OE Quality expansion tanks are designed to handle heat cycles and resist cracking. These tanks are produced from virgin plastic with no regrind to ensure durability. Rein expansion tank kits include the OE cap sensor (if applicable).
Product Desc Invoice 40Rein Expansion Tank Kit
Product Desc Long 80Rein OE Quality Expansion Tank Kit
Product Desc Short 20Expansion Tank Kit

This part fits 23 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2018BMWX42.0LL4N/A
2018BMWX43.0LL6N/A
2017BMWX32.0LL4DIESELN/A
2017BMWX32.0LL4GASN/A
2017BMWX33.0LL6N/A
2017BMWX42.0LL4N/A
2017BMWX43.0LL6N/A
2016BMWX32.0LL4DIESELN/A
2016BMWX32.0LL4GASN/A
2016BMWX33.0LL6N/A
2016BMWX42.0LL4N/A
2016BMWX43.0LL6N/A
2015BMWX32.0LL4DIESELN/A
2015BMWX32.0LL4GASN/A
2015BMWX33.0LL6N/A
2015BMWX42.0LL4N/A
2015BMWX43.0LL6N/A
2014BMWX32.0LL4N/A
2014BMWX33.0LL6N/A
2013BMWX32.0LL4N/A
2013BMWX33.0LL6N/A
2012BMWX33.0LL6N/A
2011BMWX33.0LL6N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.