HomeBelts and Cooling > Radiators, Coolers and Related ComponentsRein EPT0125 Engine Coolant Reservoir
Part #: EPT0125

Rein EPT0125 Engine Coolant Reservoir

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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 for BMW X3 and X4

The Rein Engine Coolant Reservoir (Part Number EPT0125) is designed specifically for BMW X3 and X4 models. Manufactured from virgin plastic, this expansion tank meets or exceeds original equipment specifications to ensure reliable performance and durability.

Key Features of Rein EPT0125 Expansion Tank

  • Produced from virgin plastic that meets or exceeds OE specifications
  • Resistant to cracking and wear caused by repeated heat cycles
  • Direct fitment for easy installation on BMW X3 and X4 vehicles
  • Manufactured under strict engineering standards for consistent quality
  • Durable black container designed to withstand engine compartment conditions

Detailed Product Description

The Rein engine coolant reservoir is engineered to handle the thermal stresses associated with engine heat cycles, reducing the risk of cracking and coolant leaks. Its application-specific design ensures a precise fit for BMW X3 and X4 models, simplifying replacement and maintaining the integrity of the cooling system. The reservoir’s dimensions (8.75 inches height and length, 7 inches width) and weight (1.315 lbs) are optimized for these vehicles, providing a seamless integration without modification.

Common Issues Addressed by This Expansion Tank

  • Cracking or leaking of the original coolant reservoir due to heat exposure
  • Coolant loss caused by worn or damaged expansion tanks
  • Overheating issues related to insufficient coolant containment
  • Difficulty in installation due to non-OE replacement parts
  • Premature wear from substandard plastic materials

Installation Notes and Tips

The Rein EPT0125 expansion tank is a direct replacement part designed for straightforward installation on BMW X3 and X4 models. It is recommended to drain the cooling system before removal and to inspect hoses and clamps for wear during installation. Using OEM-quality coolant and following manufacturer torque specifications will help ensure proper sealing and function.

Quality Assurance and Warranty Information

Rein expansion tanks are manufactured to meet strict engineering standards, ensuring durability and performance consistent with OE parts. Produced from high-quality virgin plastic, this reservoir resists cracking and wear from heat cycles. While specific warranty details may vary, Rein products typically come with a limited warranty against defects in materials and workmanship.

BrandRein
Part NumberEPT0125
Application TypeApplicationSpecific
ColorBLACK
Container TypeBX
Country of OriginCN
Item Height8.7500
Item Length8.7500
Item Level GTIN843266075951
Item Qty1
Item UOMEA
Item Weight1.3150
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 the plastic is durable and will have a long service life.
Product Desc Invoice 40Rein Expansion Tank
Product Desc Long 80Rein OE Quality Expansion Tank
Product Desc Short 20Expansion Tank

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.