Homeβ€Ί Belts and Cooling > Hardware, Fasteners and Fittingsβ€Ί Rein CPE0034 Engine Coolant Reservoir Cap - Radiator
Part #: CPE0034

Rein CPE0034 Engine Coolant Reservoir Cap - Radiator

Radiator
βš™οΈ 334 vehicles fit this part
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βœ…OE Direct Replacement β€” Bolt-on fit, no modifications needed
πŸš—Fitment: BMW and Rolls-Royce, 750i xDrive, Alpina B7, Alpina XB7, M760i xDrive, M760Li xDrive, M8 Gran Coupe, M850i xDrive, M850i xDrive Gran Coupe, 750Li xDrive, M2, M3, M4, M5, M550i xDrive, X5, X6, X7, Phantom, M8, 750i, 750Li, 760Li, 550i, 550i xDrive, 535i, 535i GT, 535i GT xDrive, 535i xDrive, 550i GT, 550i GT xDrive, 640i, 650i, 650i xDrive, 740i, 740Li, ActiveHybrid 5, Alpina B7 xDrive, Alpina B7L, Alpina B7L xDrive, 528i, 528i xDrive, M6, 528xi, 535xi, 525i, 525xi, 530i, 530xi, 545i, and 645Ci
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Reliable Engine Coolant Reservoir Cap for BMW and Rolls-Royce

The Rein CPE0034 engine coolant reservoir cap is engineered to meet the exacting standards required by BMW and Rolls-Royce vehicles. Designed as a direct fit replacement, this expansion tank cap ensures proper pressure regulation and coolant system integrity for a range of models.

Key Features of Rein CPE0034 Engine Coolant Reservoir Cap

  • Manufactured to strict engineering standards and specifications
  • Direct fit for precise installation without modifications
  • Meets or exceeds original equipment pressure requirements
  • Produced by an original equipment supplier for quality assurance
  • Compact dimensions: 3.75" length, 3.5" width, 2.75" height
  • Lightweight design at 0.235 lbs for efficient performance
  • Country of origin: Germany

Detailed Description and Compatibility

The Rein CPE0034 engine coolant reservoir cap is designed specifically for applications in BMW and Rolls-Royce vehicles, including popular models such as the BMW 525i, 535i, 750Li, and Rolls-Royce Phantom, Cullinan, and Wraith. This expansion tank cap maintains the correct pressure within the coolant system, preventing leaks and overheating. Manufactured by an original equipment supplier, it meets or exceeds the pressure specifications demanded by the original equipment manufacturer, ensuring reliable performance and durability.

Common Issues Addressed by This Expansion Tank Cap

  • Coolant leaks caused by worn or damaged reservoir caps
  • Overheating due to improper pressure regulation in the cooling system
  • Loss of coolant pressure leading to engine performance issues
  • Contamination of coolant from faulty sealing
  • Premature wear of cooling system components due to pressure fluctuations

Installation Notes and Tips

  • Ensure the engine is cool before removing the old reservoir cap to avoid injury
  • Verify compatibility with your specific BMW or Rolls-Royce model before installation
  • Clean the reservoir neck to ensure a proper seal with the new cap
  • Install the Rein CPE0034 cap by aligning and pressing firmly until it clicks into place
  • Check for leaks after installation by running the engine and monitoring coolant levels

Quality Assurance and Warranty Information

Rein engine coolant reservoir caps are manufactured under strict quality control standards in Germany. The CPE0034 part is produced by an original equipment supplier, ensuring it meets or exceeds OEM pressure specifications. This product is backed by Rein's commitment to quality, providing confidence in its durability and performance. Please refer to Rein's warranty policy for specific coverage details.

BrandRein
Part NumberCPE0034
Application TypeApplicationSpecific
Container TypeBG
Country of OriginDE
Item Height2.7500
Item Length3.7500
Item Level GTIN843266070611
Item Qty1
Item UOMEA
Item Weight0.2350
Item Weight Unit UOMLB
Item Width3.5000
Link to Manufacturer Pagewww.reinautomotive.com
Product Desc Extended 240Rein OE Quality expansion tank caps are designed to be direct replacements for OE caps. Rein caps are designed to match or exceed the OE materials used and are produced to the highest standards to ensure long service life.
Product Desc Invoice 40Rein Expansion Tank Cap
Product Desc Long 80Rein OE Quality Expansion Tank Cap
Product Desc Short 20Expansion Tank Cap

This part fits 334 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2026BMW760i xDrive4.4LV8Radiator
2026BMWAlpina XB74.4LV8Radiator
2026BMWM23.0LL6Radiator
2026BMWM33.0LL6Radiator
2026BMWM43.0LL6Radiator
2026BMWM54.4LV8Radiator
2026BMWM5 Touring4.4LV8Radiator
2026BMWM850i xDrive4.4LV8Radiator
2026BMWM850i xDrive Gran Coupe4.4LV8Radiator
2026BMWX54.4LV8Radiator
2026BMWX64.4LV8Radiator
2026BMWX74.4LV8Radiator
2026BMWXM4.4LV8PLUG-IN HYBRID EV-GAS (PHEV)Radiator
2026Rolls-RoyceCullinan6.7LV12Radiator
2025BMW760i xDrive4.4LV8Radiator
2025BMWAlpina B8 Gran Coupe4.4LV8Radiator
2025BMWAlpina XB74.4LV8Radiator
2025BMWM23.0LL6Radiator
2025BMWM33.0LL6Radiator
2025BMWM43.0LL6Radiator
2025BMWM54.4LV8Radiator
2025BMWM5 Touring4.4LV8Radiator
2025BMWM84.4LV8Radiator
2025BMWM8 Gran Coupe4.4LV8Radiator
2025BMWM850i xDrive4.4LV8Radiator
2025BMWM850i xDrive Gran Coupe4.4LV8Radiator
2025BMWX54.4LV8Radiator
2025BMWX64.4LV8Radiator
2025BMWX74.4LV8Radiator
2025BMWXM4.4LV8PLUG-IN HYBRID EV-GAS (PHEV)Radiator
2025Rolls-RoyceCullinan6.7LV12Radiator
2025Rolls-RoyceGhost6.7LV12Radiator
2025Rolls-RoycePhantom6.7LV12Radiator
2024BMW760i xDrive4.4LV8Radiator
2024BMWAlpina B8 Gran Coupe4.4LV8Radiator
2024BMWAlpina XB74.4LV8Radiator
2024BMWM23.0LL6Radiator
2024BMWM33.0LL6Radiator
2024BMWM43.0LL6Radiator
2024BMWM84.4LV8Radiator
2024BMWM8 Gran Coupe4.4LV8Radiator
2024BMWM850i xDrive4.4LV8Radiator
2024BMWM850i xDrive Gran Coupe4.4LV8Radiator
2024BMWX54.4LV8Radiator
2024BMWX64.4LV8Radiator
2024BMWX74.4LV8Radiator
2024BMWXM4.4LV8PLUG-IN HYBRID EV-GAS (PHEV)Radiator
2024Rolls-RoyceCullinan6.7LV12Radiator
2024Rolls-RoyceGhost6.7LV12Radiator
2024Rolls-RoycePhantom6.7LV12Radiator
2023BMW760i xDrive4.4LV8Radiator
2023BMWAlpina B8 Gran Coupe4.4LV8Radiator
2023BMWAlpina XB74.4LV8Radiator
2023BMWM23.0LL6Radiator
2023BMWM33.0LL6Radiator
2023BMWM43.0LL6Radiator
2023BMWM54.4LV8Radiator
2023BMWM550i xDrive4.4LV8Radiator
2023BMWM760i xDrive4.4LV8Radiator
2023BMWM84.4LV8Radiator
2023BMWM8 Gran Coupe4.4LV8Radiator
2023BMWM850i xDrive4.4LV8Radiator
2023BMWM850i xDrive Gran Coupe4.4LV8Radiator
2023BMWX54.4LV8Radiator
2023BMWX64.4LV8Radiator
2023BMWX74.4LV8Radiator
2023BMWXM4.4LV8PLUG-IN HYBRID EV-GAS (PHEV)Radiator
2023Rolls-RoyceCullinan6.7LV12Radiator
2023Rolls-RoyceGhost6.7LV12Radiator
2023Rolls-RoycePhantom6.7LV12Radiator
2022BMW750i xDrive4.4LV8Radiator
2022BMW750Li xDrive4.4LV8Radiator
2022BMWAlpina B8 Gran Coupe4.4LV8Radiator
2022BMWAlpina XB74.4LV8Radiator
2022BMWM33.0LL6Radiator
2022BMWM43.0LL6Radiator
2022BMWM54.4LV8Radiator
2022BMWM550i xDrive4.4LV8Radiator
2022BMWM760i xDrive6.6LV12Radiator
2022BMWM760Li xDrive6.6LV12Radiator
2022BMWM84.4LV8Radiator
2022BMWM8 Gran Coupe4.4LV8Radiator
2022BMWM850i xDrive4.4LV8Radiator
2022BMWM850i xDrive Gran Coupe4.4LV8Radiator
2022BMWX54.4LV8Radiator
2022BMWX64.4LV8Radiator
2022BMWX74.4LV8Radiator
2022Rolls-RoyceCullinan6.7LV12Radiator
2022Rolls-RoyceGhost6.7LV12Radiator
2022Rolls-RoycePhantom6.7LV12Radiator
2021BMW750i xDrive4.4LV8Radiator
2021BMW750Li xDrive4.4LV8Radiator
2021BMWAlpina XB74.4LV8Radiator
2021BMWM23.0LL6Radiator
2021BMWM33.0LL6Radiator
2021BMWM43.0LL6Radiator
2021BMWM54.4LV8Radiator
2021BMWM550i xDrive4.4LV8Radiator
2021BMWM760i xDrive6.6LV12Radiator
2021BMWM760Li xDrive6.6LV12Radiator
2021BMWM8 Gran Coupe4.4LV8Radiator
2021BMWM850i xDrive4.4LV8Radiator
2021BMWM850i xDrive Gran Coupe4.4LV8Radiator
2021BMWX54.4LV8Radiator
2021BMWX64.4LV8Radiator
2021BMWX74.4LV8Radiator
2021Rolls-RoyceCullinan6.7LV12Radiator
2021Rolls-RoyceDawn6.6LV12Radiator
2021Rolls-RoyceGhost6.7LV12Radiator
2021Rolls-RoycePhantom6.7LV12Radiator
2021Rolls-RoyceWraith6.6LV12Radiator
2020BMW750i xDrive4.4LV8Radiator
2020BMW750Li xDrive4.4LV8Radiator
2020BMWM23.0LL6Radiator
2020BMWM43.0LL6Radiator
2020BMWM54.4LV8Radiator
2020BMWM550i xDrive4.4LV8Radiator
2020BMWM760i xDrive6.6LV12Radiator
2020BMWM760Li xDrive6.6LV12Radiator
2020BMWM84.4LV8Radiator
2020BMWM8 Gran Coupe4.4LV8Radiator
2020BMWM850i xDrive4.4LV8Radiator
2020BMWM850i xDrive Gran Coupe4.4LV8Radiator
2020BMWX54.4LV8Radiator
2020BMWX64.4LV8Radiator
2020BMWX74.4LV8Radiator
2020Rolls-RoyceCullinan6.7LV12Radiator
2020Rolls-RoyceDawn6.6LV12Radiator
2020Rolls-RoyceGhost6.6LV12Radiator
2020Rolls-RoycePhantom6.7LV12Radiator
2020Rolls-RoyceWraith6.6LV12Radiator
2019BMW750i4.4LV8Radiator
2019BMW750i xDrive4.4LV8Radiator
2019BMW750Li4.4LV8Radiator
2019BMW750Li xDrive4.4LV8Radiator
2019BMWM23.0LL6Radiator
2019BMWM43.0LL6Radiator
2019BMWM54.4LV8Radiator
2019BMWM550i xDrive4.4LV8Radiator
2019BMWM760i xDrive6.6LV12Radiator
2019BMWM760Li xDrive6.6LV12Radiator
2019BMWM850i xDrive4.4LV8Radiator
2019BMWX54.4LV8Radiator
2019BMWX6M4.4LV8Radiator
2019BMWX74.4LV8Radiator
2019Rolls-RoyceCullinan6.7LV12Radiator
2019Rolls-RoyceDawn6.6LV12Radiator
2019Rolls-RoyceGhost6.6LV12Radiator
2019Rolls-RoycePhantom6.7LV12Radiator
2019Rolls-RoyceWraith6.6LV12Radiator
2018BMW750i4.4LV8Radiator
2018BMW750i xDrive4.4LV8Radiator
2018BMW750Li4.4LV8Radiator
2018BMW750Li xDrive4.4LV8Radiator
2018BMWM33.0LL6Radiator
2018BMWM43.0LL6Radiator
2018BMWM54.4LV8Radiator
2018BMWM550i xDrive4.4LV8Radiator
2018BMWM760i xDrive6.6LV12Radiator
2018BMWM760Li xDrive6.6LV12Radiator
2018BMWX5M4.4LV8Radiator
2018BMWX6M4.4LV8Radiator
2018Rolls-RoyceDawn6.6LV12Radiator
2018Rolls-RoyceGhost6.6LV12Radiator
2018Rolls-RoycePhantom6.7LV12Radiator
2018Rolls-RoyceWraith6.6LV12Radiator
2017BMW750i4.4LV8Radiator
2017BMW750i xDrive4.4LV8Radiator
2017BMW750Li4.4LV8Radiator
2017BMW750Li xDrive4.4LV8Radiator
2017BMWM33.0LL6Radiator
2017BMWM43.0LL6Radiator
2017BMWM760i xDrive6.6LV12Radiator
2017BMWM760Li xDrive6.6LV12Radiator
2017BMWX5M4.4LV8Radiator
2017BMWX6M4.4LV8Radiator
2017Rolls-RoyceDawn6.6LV12Radiator
2017Rolls-RoyceGhost6.6LV12Radiator
2017Rolls-RoyceWraith6.6LV12Radiator
2016BMW750i4.4LV8Radiator
2016BMW750i xDrive4.4LV8Radiator
2016BMW750Li xDrive4.4LV8Radiator
2016BMWM33.0LL6Radiator
2016BMWM43.0LL6Radiator
2016BMWX5M4.4LV8Radiator
2016BMWX6M4.4LV8Radiator
2016Rolls-RoyceDawn6.6LV12Radiator
2016Rolls-RoyceGhost6.6LV12Radiator
2016Rolls-RoyceWraith6.6LV12Radiator
2015BMW760Li6.0LV12Radiator
2015BMWM33.0LL6Radiator
2015BMWM43.0LL6Radiator
2015BMWX5M4.4LV8Radiator
2015BMWX6M4.4LV8Radiator
2015Rolls-RoyceGhost6.6LV12Radiator
2015Rolls-RoyceWraith6.6LV12Radiator
2014BMW760Li6.0LV12Radiator
2014BMWX63.0LL6N/A
2014BMWX64.4LV8Radiator
2014Rolls-RoyceGhost6.6LV12Radiator
2014Rolls-RoyceWraith6.6LV12Radiator
2013BMW550i4.4LV8Radiator
2013BMW550i xDrive4.4LV8Radiator
2013BMW760Li6.0LV12Radiator
2013BMWM34.0LV8N/A
2013BMWX53.0LL6GASN/A
2013BMWX54.4LV8Radiator
2013BMWX63.0LL6N/A
2013BMWX64.4LV8Radiator
2013Rolls-RoyceGhost6.6LV12Radiator
2012BMW535i3.0LL6N/ATo 3/12, w/2.0 Bar
2012BMW535i GT3.0LL6N/ATo 12/11, w/2.0 Bar
2012BMW535i GT xDrive3.0LL6N/ATo 12/11, w/2.0 Bar
2012BMW535i xDrive3.0LL6N/ATo 3/12, w/2.0 Bar
2012BMW550i4.4LV8Radiator
2012BMW550i GT4.4LV8Radiator
2012BMW550i GT xDrive4.4LV8Radiator
2012BMW550i xDrive4.4LV8Radiator
2012BMW640i3.0LL6N/ATo 3/12, w/2.0 Bar
2012BMW650i4.4LV8Radiator
2012BMW650i xDrive4.4LV8Radiator
2012BMW740i3.0LL6N/ATo 3/12, w/2.0 Bar
2012BMW740Li3.0LL6N/ATo 3/12, w/2.0 Bar
2012BMW750i4.4LV8Radiator
2012BMW750i xDrive4.4LV8Radiator
2012BMW750Li4.4LV8Radiator
2012BMW750Li xDrive4.4LV8Radiator
2012BMW760Li6.0LV12Radiator
2012BMWActiveHybrid 53.0LL6RadiatorTo 12/11, w/2.0 Bar
2012BMWM34.0LV8N/A
2012BMWX53.0LL6GASN/A
2012BMWX54.4LV8Radiator
2012BMWX63.0LL6N/A
2012BMWX64.4LV8Radiator
2012Rolls-RoyceGhost6.6LV12Radiator
2011BMW528i3.0LL6N/A
2011BMW535i3.0LL6N/Aw/2.0 Bar
2011BMW535i GT3.0LL6N/Aw/2.0 Bar
2011BMW535i GT xDrive3.0LL6N/Aw/2.0 Bar
2011BMW535i xDrive3.0LL6N/Aw/2.0 Bar
2011BMW550i4.4LV8Radiator
2011BMW550i GT4.4LV8Radiator
2011BMW550i GT xDrive4.4LV8Radiator
2011BMW550i xDrive4.4LV8Radiator
2011BMW740i3.0LL6N/Aw/2.0 Bar
2011BMW740Li3.0LL6N/Aw/2.0 Bar
2011BMW750i4.4LV8Radiator
2011BMW750i xDrive4.4LV8Radiator
2011BMW750Li4.4LV8Radiator
2011BMW750Li xDrive4.4LV8Radiator
2011BMW760Li6.0LV12Radiator
2011BMWM34.0LV8N/A
2011BMWX53.0LL6GASN/A
2011BMWX54.4LV8Radiator
2011BMWX63.0LL6N/A
2011BMWX64.4LV8Radiator
2011Rolls-RoyceGhost6.6LV12Radiator
2010BMW528i3.0LL6N/A
2010BMW528i xDrive3.0LL6N/A
2010BMW535i3.0LL6N/A
2010BMW535i GT3.0LL6N/Aw/2.0 Bar
2010BMW535i xDrive3.0LL6N/A
2010BMW550i4.8LV8N/A
2010BMW550i GT4.4LV8Radiator
2010BMW550i GT xDrive4.4LV8Radiator
2010BMW650i4.8LV8N/A
2010BMW750i4.4LV8Radiator
2010BMW750i xDrive4.4LV8Radiator
2010BMW750Li4.4LV8Radiator
2010BMW750Li xDrive4.4LV8Radiator
2010BMW760Li6.0LV12Radiator
2010BMWM34.0LV8N/A
2010BMWM55.0LV10N/A
2010BMWM65.0LV10N/A
2010BMWX53.0LL6GASN/A
2010BMWX54.4LV8Radiator
2010BMWX54.8LV8N/A
2010BMWX63.0LL6N/A
2010BMWX64.4LV8Radiator
2010Rolls-RoyceGhost6.6LV12Radiator
2009BMW528i3.0LL6N/A
2009BMW528i xDrive3.0LL6N/A
2009BMW535i3.0LL6N/A
2009BMW535i xDrive3.0LL6N/A
2009BMW550i4.8LV8N/A
2009BMW650i4.8LV8N/A
2009BMW750i4.4LV8Radiator
2009BMW750Li4.4LV8Radiator
2009BMWM34.0LV8N/A
2009BMWM55.0LV10N/A
2009BMWM65.0LV10N/A
2009BMWX53.0LL6GASN/A
2009BMWX54.8LV8N/A
2009BMWX63.0LL6N/A
2009BMWX64.4LV8Radiator
2008BMW528i3.0LL6N/A
2008BMW528xi3.0LL6N/A
2008BMW535i3.0LL6N/A
2008BMW535xi3.0LL6N/A
2008BMW550i4.8LV8N/A
2008BMW650i4.8LV8N/A
2008BMWM34.0LV8N/A
2008BMWM55.0LV10N/A
2008BMWM65.0LV10N/A
2008BMWX53.0LL6N/A
2008BMWX54.8LV8N/A
2008BMWX63.0LL6N/A
2008BMWX64.4LV8Radiator
2007BMW525i3.0LL6N/A
2007BMW525xi3.0LL6N/A
2007BMW530i3.0LL6N/A
2007BMW530xi3.0LL6N/A
2007BMW550i4.8LV8N/A
2007BMW650i4.8LV8N/A
2007BMWM55.0LV10N/A
2007BMWM65.0LV10N/A
2007BMWX53.0LL6N/A
2007BMWX54.8LV8N/A
2006BMW525i3.0LL6N/A
2006BMW525xi3.0LL6N/A
2006BMW530i3.0LL6N/A
2006BMW530xi3.0LL6N/A
2006BMW550i4.8LV8N/A
2006BMW650i4.8LV8N/A
2006BMWM55.0LV10N/A
2006BMWM65.0LV10N/A
2005BMW525i2.5LL6N/A
2005BMW530i3.0LL6N/A
2005BMW545i4.4LV8N/A
2005BMW645Ci4.4LV8N/A
2004BMW525i2.5LL6N/A
2004BMW530i3.0LL6N/A
2004BMW545i4.4LV8N/A
2004BMW645Ci4.4LV8N/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.