URO 4121703 Engine Coolant Bypass Hose - Upper

Engine Coolant Bypass Hose for Saab 900

This URO engine coolant bypass hose is a direct-fit replacement for select Saab 900 applications. It is precision-molded to OE bypass hose dimensions and shape for straightforward installation, with materials chosen for heat, ozone, and electrochemical degradation resistance.

• Fits 1991-1994 Saab 900, upper position
• Direct replacement for the heater valve to heater bypass valve hose routing
• Precision-molded to OE bypass hose dimensions and shape
• EPDM construction resists electrochemical degradation from the inside out
• Heat- and ozone-resistant for cooling system service
• Temperature rated from -40°F to 275°F (-40°C to 135°C)

Fitment Details

Compatible with 1994 Saab 900, upper; 1993 Saab 900, upper; 1992 Saab 900, upper; and 1991 Saab 900, upper. Notes vary by chassis range on 1991-1993 Saab 900 applications, so confirm the heater valve to heater bypass valve routing before ordering. Part number 4121703 is also referenced as 41 21 703.

This part cross-references URO-002786 for the same application.

What This Hose Helps Address

• Coolant leakage at the bypass hose connection
• Cracked or hardened rubber from age and heat exposure
• Cooling system service on Saab 900 upper heater bypass routing
• Fitment issues caused by a hose that no longer matches OE shape
• Electrolysis-related rubber breakdown in the cooling circuit

Installation Notes

Verify the upper hose routing from the heater valve to the heater bypass valve before installation. Compare the removed hose to the new URO 4121703 part for length, bend profile, and end orientation. Inspect adjoining clamps, valves, and coolant passages for wear or contamination before refilling the system.

Quality Assurance

URO 4121703 is backed by a 24-month unlimited mileage warranty. The hose uses durable EPDM material and is built to OE dimensions for consistent fitment on the listed Saab 900 applications.