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Part #: EPT0151

Rein EPT0151 Engine Coolant Reservoir - Radiator

Radiator
⚙️ 80 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, 535d, 535d xDrive, 535i, 535i GT, 535i GT xDrive, 535i xDrive, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, 740i, 740Ld xDrive, 740Li, 740Li xDrive, ActiveHybrid 5, and ActiveHybrid 7
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OE Quality Expansion Tank for BMW Cooling Systems

The Rein EPT0151 engine coolant reservoir is an OE-quality expansion tank built for BMW cooling system service. It is produced from virgin plastic to help resist heat-cycle cracking and maintain durable, long-term performance in demanding engine bay conditions.

  • Produced from virgin plastic meeting or exceeding OE specifications
  • Resists cracking and wear from repeated heat cycles to help prevent coolant loss
  • Direct-fit design for straightforward installation
  • Manufactured to strict engineering standards for materials and tolerances
  • Rein OE quality expansion tank for BMW 535i, 535i xDrive, 640i, 740i, and related applications

Built for BMW Fitment and Cooling Reliability

Rein EPT0151 is an OE-style coolant reservoir designed for application-specific BMW fitment. It serves as the expansion tank in the cooling system, helping maintain proper coolant volume and system stability on vehicles such as the BMW 535i GT, 640i Gran Coupe, and 740Li. This part cross-references BMW 17137601949 and 17137806038 for the same application.

What This Expansion Tank Helps Address

  • Coolant leaks caused by cracked or aging reservoir plastic
  • Loss of coolant from heat-cycle damage
  • Warning lights or low coolant level concerns
  • Cooling system service needs on BMW 535i, 640i, and 740i models
  • Replacement of a worn expansion tank during radiator or cooling repairs

Installation Notes and Fitment

Compatible With: Fits 2013-2019 BMW 640i Gran Coupe, N/A; Fits 2014-2019 BMW 640i xDrive Gran Coupe, N/A; Fits 2012-2018 BMW 640i, N/A; Fits 2014-2018 BMW 640i xDrive, N/A; Fits 2010-2017 BMW 535i GT, N/A; Fits 2011-2017 BMW 535i GT xDrive, N/A; Fits 2014-2016 BMW 535d, N/A; Fits 2014-2016 BMW 535d xDrive, N/A; Fits 2011-2016 BMW 535i, N/A; Fits 2011-2016 BMW 535i xDrive, N/A; Fits 2012-2016 BMW ActiveHybrid 5, Radiator; Fits 2011-2015 BMW 740i, N/A; Fits 2015 BMW 740Ld xDrive, N/A; Fits 2011-2015 BMW 740Li, N/A; Fits 2013-2015 BMW 740Li xDrive, N/A; Fits 2013-2015 BMW ActiveHybrid 7, Radiator. Verify the reservoir shape, hose connections, and mounting points against the original part before installation. Proper cooling system bleeding and refill procedures should be followed after replacement.

Quality Assurance

Rein manufactures this expansion tank to strict material and dimensional standards, using virgin plastic rather than regrind to improve durability and heat-cycle resistance. The result is an OE-quality replacement for BMW cooling system repair on applications including the 535i, 640i, and 740i. Part number EPT0151 is engineered for direct replacement service.

BrandRein
Part NumberEPT0151
Application TypeApplicationspecific
Bullet Point 1Produced from virgin plastic meeting/exceeding oe specifications
Bullet Point 2Resistant to cracking and wear from heat cycles preventing coolan
Bullet Point 3Direct fitment allows easy installation
Bullet Point 4Manufactured to strict engineering standards/specifications in ma
Container TypeBx
Country of OriginCn
Item Height9.0500
Item Length10.2300
Item Level GTIN888544064845
Item Qty1
Item Quantity Size1
Item Quantity Size UOMEa
Item UOMEa
Item Weight2.5950
Item Weight Unit UOMLb
Item Width8.8500
Product Desc Extended 240Rein oe quality expansion tanks are designed to handle heat cycle
Product Desc Invoice 40Rein expansion tank
Product Desc Long 80Rein oe quality expansion tank
Product Desc Short 20Expansion tank

This part fits 80 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2019BMW640i Gran Coupe3.0LL6N/A
2019BMW640i xDrive Gran Coupe3.0LL6N/A
2018BMW640i3.0LL6N/A
2018BMW640i Gran Coupe3.0LL6N/A
2018BMW640i xDrive3.0LL6N/A
2018BMW640i xDrive Gran Coupe3.0LL6N/A
2017BMW535i GT3.0LL6N/A
2017BMW535i GT xDrive3.0LL6N/A
2017BMW640i3.0LL6N/A
2017BMW640i Gran Coupe3.0LL6N/A
2017BMW640i xDrive3.0LL6N/A
2017BMW640i xDrive Gran Coupe3.0LL6N/A
2016BMW535d3.0LL6DIESELN/A
2016BMW535d xDrive3.0LL6DIESELN/A
2016BMW535i3.0LL6N/A
2016BMW535i GT3.0LL6N/A
2016BMW535i GT xDrive3.0LL6N/A
2016BMW535i xDrive3.0LL6N/A
2016BMW640i3.0LL6N/A
2016BMW640i Gran Coupe3.0LL6N/A
2016BMW640i xDrive3.0LL6N/A
2016BMW640i xDrive Gran Coupe3.0LL6N/A
2016BMWActiveHybrid 53.0LL6Radiator
2015BMW535d3.0LL6DIESELN/A
2015BMW535d xDrive3.0LL6DIESELN/A
2015BMW535i3.0LL6N/A
2015BMW535i GT3.0LL6N/A
2015BMW535i GT xDrive3.0LL6N/A
2015BMW535i xDrive3.0LL6N/A
2015BMW640i3.0LL6N/A
2015BMW640i Gran Coupe3.0LL6N/A
2015BMW640i xDrive3.0LL6N/A
2015BMW640i xDrive Gran Coupe3.0LL6N/A
2015BMW740i3.0LL6N/A
2015BMW740Ld xDrive3.0LL6DIESELN/A
2015BMW740Li3.0LL6N/A
2015BMW740Li xDrive3.0LL6N/A
2015BMWActiveHybrid 53.0LL6Radiator
2015BMWActiveHybrid 73.0LL6Radiator
2014BMW535d3.0LL6DIESELN/A
2014BMW535d xDrive3.0LL6DIESELN/A
2014BMW535i3.0LL6N/A
2014BMW535i GT3.0LL6N/A
2014BMW535i GT xDrive3.0LL6N/A
2014BMW535i xDrive3.0LL6N/A
2014BMW640i3.0LL6N/A
2014BMW640i Gran Coupe3.0LL6N/A
2014BMW640i xDrive3.0LL6N/A
2014BMW640i xDrive Gran Coupe3.0LL6N/A
2014BMW740i3.0LL6N/A
2014BMW740Li3.0LL6N/A
2014BMW740Li xDrive3.0LL6N/A
2014BMWActiveHybrid 53.0LL6Radiator
2014BMWActiveHybrid 73.0LL6Radiator
2013BMW535i3.0LL6N/A
2013BMW535i GT3.0LL6N/A
2013BMW535i GT xDrive3.0LL6N/A
2013BMW535i xDrive3.0LL6N/A
2013BMW640i3.0LL6N/A
2013BMW640i Gran Coupe3.0LL6N/A
2013BMW740i3.0LL6N/A
2013BMW740Li3.0LL6N/A
2013BMW740Li xDrive3.0LL6N/A
2013BMWActiveHybrid 53.0LL6Radiator
2013BMWActiveHybrid 73.0LL6Radiator
2012BMW535i3.0LL6N/A
2012BMW535i GT3.0LL6N/A
2012BMW535i GT xDrive3.0LL6N/A
2012BMW535i xDrive3.0LL6N/A
2012BMW640i3.0LL6N/A
2012BMW740i3.0LL6N/A
2012BMW740Li3.0LL6N/A
2012BMWActiveHybrid 53.0LL6Radiator
2011BMW535i3.0LL6N/A
2011BMW535i GT3.0LL6N/A
2011BMW535i GT xDrive3.0LL6N/A
2011BMW535i xDrive3.0LL6N/A
2011BMW740i3.0LL6N/A
2011BMW740Li3.0LL6N/A
2010BMW535i GT3.0LL6N/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:

171376019491713764728317137806038

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

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