HomeBelts and Cooling > Hoses and PipesRein CHR0666 Radiator Coolant Hose - Upper or Upper - Main Radiator
Part #: CHR0666

Rein CHR0666 Radiator Coolant Hose - Upper or Upper - Main Radiator

Upper
⚙️ 20 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$46.37Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, X6 and X5
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Rein Radiator Coolant Hose CHR0666

The Rein radiator coolant hose CHR0666 is designed specifically for BMW X5 and X6 models, providing a reliable and precise fit. Engineered to reduce installation time, this hose eliminates the need for cutting or adjusting, ensuring a straightforward replacement process.

  • Reduces installation time with a direct fit design
  • No cutting, refitting, or adjusting required
  • Prevents leaks by avoiding reuse of old quick connectors
  • Resistant to heat, salt, road debris, oil, and other contaminants
  • Constructed from durable EPDM hose material

Detailed Product Description

The Rein radiator coolant hose CHR0666 is an application-specific, branched hose tailored for BMW X5 and X6 vehicles. Measuring 17.25 inches (43.815 cm) in centerline length, it features three hose ends with precise inside and outside diameters to ensure a secure connection. The hose ends measure approximately 1.905 inches (4.84 cm), 2.001 inches (5.08 cm), and 1.264 inches (3.21 cm) inside diameter respectively, accommodating the original equipment specifications. Manufactured from EPDM, the hose offers excellent resistance to heat, oil, salt, and road debris, which helps maintain system integrity under demanding conditions. The black color and branched design align with OEM standards, making it a suitable replacement part for the cooling system.

Compatible Vehicles and Applications

This radiator coolant hose is compatible with the following BMW models:

  • BMW X5
  • BMW X6

It is designed to replace the original radiator coolant hose, ensuring proper coolant flow and system performance in these specific vehicles.

Common Issues Addressed by Rein Radiator Coolant Hose CHR0666

  • Leaks caused by worn or damaged radiator hoses
  • Coolant system failures due to improper hose fitment
  • Overheating issues related to compromised coolant flow
  • Corrosion and damage from exposure to road contaminants
  • Time-consuming installation processes with generic hoses

Installation Notes and Tips

The Rein radiator coolant hose CHR0666 is designed for a direct fit installation, eliminating the need for cutting, refitting, or adjusting. It is recommended to inspect and replace any old quick connectors to prevent leaks and ensure a secure seal. Use appropriate clamps and verify hose positioning to maintain optimal coolant flow. Always allow the engine to cool before beginning installation to avoid injury.

Quality Assurance and Warranty

Manufactured with EPDM material, this hose offers durability and resistance to environmental factors such as heat, oil, and road debris. Rein products are engineered to meet or exceed OEM specifications for fit and function. While specific warranty details are not provided, Rein maintains quality standards consistent with automotive replacement parts.

BrandRein
Part NumberCHR0666
Application TypeApplicationSpecific
Centerline Length Inches17.2500
Centerline Length Metric43.8150000
ColorBlack
Container TypeBG
Country of OriginTR
Heat Shield IncNo
Hose End 1 Inside Diameter Inches1.9050
Hose End 1 Inside Diameter Metric4.8387000
Hose End 1 Outside Diameter Inches2.3340
Hose End 1 Outside Diameter Metric5.9283600
Hose End 2 Inside Diameter Inches2.0010
Hose End 2 Inside Diameter Metric5.0825400
Hose End 2 Outside Diameter Inches2.3350
Hose End 2 Outside Diameter Metric5.9309000
Hose End 3 Inside Diameter Inches1.2640
Hose End 3 Inside Diameter Metric3.2105600
Hose End 3 Outside Diameter Inches1.6030
Hose End 3 Outside Diameter Metric4.0716200
Hose MaterialEPDM
Hose TypeBranched
Item Height4.0000
Item Length17.2500
Item Level GTIN888544083228
Item Qty1
Item UOMEA
Item Weight0.8850
Item Weight Unit UOMLB
Item Width9.5000
Link to Manufacturer Pagewww.reinautomotive.com
Product Desc Extended 240Rein OE Quality radiator hoses are designed to be direct replacements for OE hoses and assemblies. Rein hoses are identical, from the size and shape of their branches to the thermoplastic quick connect fittings, as called for by the OE.
Product Desc Invoice 40Rein Radiator Hose
Product Desc Long 80Rein OE Quality Radiator Hose
Product Desc Short 20Radiator Hose
Protective Shield IncYes
Qty of Branches1
Warranty Distance24000
Warranty Time24

This part fits 20 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2019BMWX63.0LL6Upper
2018BMWX53.0LL6GASUpper
2018BMWX63.0LL6Upper
2017BMWX53.0LL6GASUpper
2017BMWX63.0LL6Upper
2016BMWX53.0LL6GASUpper
2016BMWX63.0LL6Upper
2015BMWX53.0LL6GASUpper
2015BMWX63.0LL6Upper
2014BMWX53.0LL6GASUpper
2014BMWX63.0LL6Upper
2013BMWX53.0LL6GASUpper
2013BMWX63.0LL6Upper
2012BMWX53.0LL6GASUpper
2012BMWX63.0LL6Upper
2011BMWX53.0LL6GASUpper
2011BMWX63.0LL6Upper
2010BMWX63.0LL6Upper - Main Radiator
2009BMWX63.0LL6Upper - Main Radiator
2008BMWX63.0LL6Upper - Main Radiator

* 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.