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Rein CHH0173P - HVAC Heater Hose (Heater Core To Expansion Tank)
Product Overview
The Rein CHH0173P HVAC Heater Hose is an essential component for the heating system in BMW vehicles. Designed to connect the heater core to the expansion tank, this high-quality hose ensures the efficient transfer of engine heat through coolant, maintaining a comfortable cabin temperature. Manufactured to OE standards, the Rein heater hose is built for superior durability and reliability, making it an ideal choice for both enthusiastic DIYers and professional technicians. Regular inspection and replacement of HVAC hoses are crucial to prevent system failures and ensure optimal vehicle performance. Choose Rein CHH0173P for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Rein CHH0173P is equivalent to or replaces the following part numbers: 64 21 8 409 066, 64218409066.
Vehicle Compatibility
- BMW X5 4.4i (2000–2003)
- BMW X5 4.6is (2001–2003)
This may also fit other applications. Please use the vehicle selector tool to verify fitment.
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
- Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Established Trust: Serving the European auto community since 2000.
Frequently Asked Questions
What does the Rein CHH0173P HVAC Heater Hose do?
The Rein CHH0173P HVAC Heater Hose connects the heater core to the expansion tank, facilitating the transfer of engine coolant for efficient heating of your vehicle's interior. It is a critical component for maintaining a comfortable cabin environment.
How do I know if my heater hose needs replacement?
Common symptoms indicating that the heater hose may require replacement include visible cracks or leaks, reduced heating performance, and coolant loss. Regular inspection is recommended to ensure optimal function of the vehicle's HVAC system.
Can I install the Rein CHH0173P myself?
Yes, the Rein CHH0173P can be installed by DIY enthusiasts. However, ensure to follow safety precautions and consult your vehicle's service manual for proper installation procedures.
What are the symptoms of a faulty HVAC Heater Hose?
Symptoms of a faulty HVAC Heater Hose may include overheating, poor cabin heating, and visible leaks under the vehicle. It is important to address these issues promptly to avoid further damage to the HVAC system.
Why should I choose Rein for my HVAC Heater Hose needs?
Rein is known for its high-quality automotive parts that meet or exceed OE specifications. Order Rein CHH0173P today for a factory-correct replacement that restores safety and performance.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandRein
- ManufacturerRein
- MPNCHH0173P
- Part TypeHVAC Heater Hose
- PositionHeater Core To Expansion Tank
- OE Part Numbers64 21 8 409 066, 64218409066
- FeaturesApplication Type : Application Specific
Bullet Point 1 : Reduces installation time.
Bullet Point 2 : No cutting, refitting or adjusting the hose.
Bullet Point 3 : Prevents leaks and comebacks from reusing old quick connectors and o-rings.
Bullet Point 4 : Resistant to heat, salt, road debris, oil and other contaminants.
Centerline Length Inches : 25.1800
Centerline Length Metric : 63.9572000
Color : Black
Container Type : BG
Country of Origin : DE
Heat Shield Inc : No
Hose End 1 Inside Diameter Inches : 0.7500
Hose End 1 Inside Diameter Metric : 1.9050000
Hose End 1 Outside Diameter Inches : 0.9800
Hose End 1 Outside Diameter Metric : 2.4892000
Hose End 2 Inside Diameter Inches : 1.1300
Hose End 2 Inside Diameter Metric : 2.8702000
Hose End 2 Outside Diameter Inches : 1.4200
Hose End 2 Outside Diameter Metric : 3.6068000
Hose End 3 Inside Diameter Inches : 0.0000
Hose End 3 Inside Diameter Metric : 0.0000000
Hose End 4 Inside Diameter Inches : 0.0000
Hose End 4 Inside Diameter Metric : 0.0000000
Hose End 5 Inside Diameter Inches : 0.0000
Hose End 5 Inside Diameter Metric : 0.0000000
Hose Material : EPDM
Hose Type : Single
Industry Standards : SAE J20R4 -D1
Item Height : 2.7500
Item Length : 12.0000
Item Level GTIN : 843266050545
Item Qty : 1
Item Quantity Size : 1
Item Quantity Size UOM : EA
Item UOM : EA
Item Weight : 0.5100
Item Weight Unit UOM : LB
Item Width : 6.5000
Link to Manufacturer Page : www.reinautomotive.com
Maximum Working Pressure : 50.0000
Product Desc Extended 240 : Rein heater 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 40 : Rein Heater Hose
Product Desc Long 80 : Rein OE Quality Heater Hose
Product Desc Short 20 : Heater Hose
Protective Shield Inc : No
Qty of Quick Connect Fittings : 1
Tech Note : Complete OE Quality Direct Fit European Hose
Warranty Distance : 24000
Warranty Time : 24
Warranty Time UOM : MO
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2003 | BMW | X5 | 4.4i (4.4 V8 GAS) | Notes: w/Quick Connectors |
| 2003 | BMW | X5 | 4.6is (4.6 V8 GAS) | Notes: w/Quick Connectors |
| 2002 | BMW | X5 | 4.4i (4.4 V8 GAS) | Notes: w/Quick Connectors |
| 2002 | BMW | X5 | 4.6is (4.6 V8 GAS) | Notes: w/Quick Connectors |
| 2001 | BMW | X5 | 4.4i (4.4 V8 GAS) | Notes: w/Quick Connectors |
| 2000 | BMW | X5 | 4.4i (4.4 V8 GAS) | Notes: w/Quick Connectors |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.










