Rein CHH0678 HVAC Heater Hose - Engine To Heater Inlet Hose

OE Heater Hose for Volvo Cooling System Service

Rein CHH0678 is an OE-quality heater hose built for European vehicle cooling system repairs. It is a direct replacement for the original hose assembly, with the correct branch shape and thermoplastic quick connect fitting for a clean service on Volvo C30, C70, S40, and V50 applications.

Designed for the engine-to-heater inlet hose position, this Rein heater hose helps restore proper coolant flow while reducing the time needed for installation. The EPDM construction and integrated heat shield support durability in demanding underhood conditions.

Key Features

• Direct OE-style replacement for the original heater hose assembly
• Fits 2007-2013 Volvo C30, engine to heater inlet hose
• Fits 2006-2013 Volvo C70, engine to heater inlet hose
• Fits 2004-2011 Volvo S40, engine to heater inlet hose
• Fits 2005-2011 Volvo V50, engine to heater inlet hose
• EPDM hose material with black finish
• Thermoplastic quick connect fitting for OE-style connection points
• Heat shield included for added thermal protection
• Resistant to heat, salt, road debris, oil, and other contaminants
• Rein CHH0678 is shaped to match the original hose routing and branch layout

Detailed Description

Rein CHH0678 is an OE quality HVAC heater hose for Volvo cooling system service. It is engineered as a direct replacement for the factory hose and hose assembly, with the same centerline length, branch configuration, and quick connect design used on the original part. That makes it a practical choice for restoring heater circuit performance on Volvo C30, Volvo C70, Volvo S40, and Volvo V50 models.

This hose is built from EPDM and includes a thermoplastic quick connect fitting to match the OE connection style. By using the correct formed shape and connector design, CHH0678 helps avoid the trimming, refitting, and adjustment often needed with universal hose solutions. The result is a cleaner repair with fewer opportunities for leaks at the connection points.

This part cross-references Volvo 30636951 for the same application. Rein CHH0678 is a direct-fit heater hose for the engine to heater inlet hose position on the listed Volvo vehicles.

What It Helps Solve

• Coolant leaks at a worn or cracked heater hose
• Heat damage from aged underhood hose material
• Fitment issues caused by incorrect hose shape or length
• Leak points from reusing old quick connectors and O-rings
• Extended repair time from cutting or modifying a replacement hose

Installation Notes and Tips

Install CHH0678 in the engine to heater inlet hose position on the confirmed Volvo applications. Verify connector engagement, hose routing, and clearance around nearby components before finalizing the repair. Because this hose uses OE-style quick connect hardware, inspect the mating surfaces and sealing points during service to help prevent repeat leaks.

Quality Assurance

Rein designs this heater hose as an OE-quality replacement for European vehicles, with construction and connector details matched to the original application. Part number CHH0678 is built for direct replacement service on the listed Volvo models.