URO 8E1819373T HVAC Heater Hose

OE-Style Heater Hose for Audi S4

This URO HVAC heater hose is a molded replacement for the heater core to water pipe connection on the 2004-2009 Audi S4. Built from EPDM and shaped to match the original routing, it supports a clean installation and proper under-hood appearance.

Part number 8E1819373T is specified for Audi S4 heater hose service where the original hose has aged, softened, or developed leaks. It is also referenced as 8E1 819 373T and URO-012003 for the same application.

Key Features

• Fits 2004-2009 Audi S4, heater core to water pipe
• Molded to OE heater hose shape for correct routing and appearance
• EPDM construction with resistance to engine heat and ozone
• ECD-resistant rubber formulation helps reduce electrolysis-related breakdown
• Temperature range: -40°F to 275°F (-40°C to 135°C)
• Black finish with 3.9 mm wall thickness
• End 3 inside diameter: 19 mm

Detailed Description

URO part number 8E1819373T is an HVAC heater hose made for the Audi S4 cooling and heater circuit. The molded EPDM design follows the OE hose shape, which helps maintain the original hose path between the heater core and water pipe while simplifying replacement. For Audi S4 owners searching for a heater core to water pipe hose, 8E1819373T provides the correct form factor and material specification for this application.

The EPDM rubber is selected for resistance to heat, ozone, and electrochemical degradation, helping the hose hold up in a demanding cooling-system environment. This makes it a direct replacement choice for 2004-2009 Audi S4 heater hose service when the original hose shows cracking, swelling, or seepage.

What It Helps Address

• Coolant seepage at the heater hose connection
• Cracked or hardened rubber from heat cycling
• Incorrect hose routing after prior repairs
• Loss of heater performance caused by hose leakage
• Degraded original hose material in the Audi S4 cooling system

Installation Notes and Tips

Verify the hose routing against the original part before installation and confirm the connection points match the heater core to water pipe layout. Inspect adjoining pipes, clamps, and sealing surfaces for wear or corrosion before installing the new hose. This part is listed for 2004-2009 Audi S4 models only, so confirm vehicle year and application details before ordering.

Quality Assurance

URO backs this heater hose with a 24-month unlimited mileage warranty. Part number 8E1819373T is built to OE-style fitment standards for the specified Audi S4 application.