# MotoRad 7304-170 Fail Safe™ Series Thermostat for 1993-2009 Audi A4 ### Specifications Bypass Diameter: 1.37" Bypass Length: 0.97" Flange Thickness: 0.068" Gasket or Seal included: No Installation Tool Included: No Jiggle Pin Weep Hole: Yes Sealing Flange Outside Diameter: 2.64" Temperature (Degree): 170F ### Features - Exclusive, patented design - High quality Stainless Steel and Copper construction - Locking technology prevents costly engine damage - 100% tested and calibrated - Manufactured with the highest quality materials from an OE supplier ### Product Details Fail Safe™ Series Thermostat (7304-170) by MotoRad®. Temperature: 170F. Fail-Safe Thermostats offer premium, patented technology for superior protection over any thermostat on the market. Only Fail-Safe is designed to lock in the open position when overheating occurs due to a failing cooling system component. This allows maximum coolant flow, thus preventing expensive engine damage. Fail-Safe is designed to help protect your engine when overheating occurs. When overheating occurs, Fail-Safe automatically locks in the open position to permit maximum coolant flow. When standard thermostats fail, they lock in the closed position and prevent coolant flow to the engine, which can possibly cause serious damage to your engine. Fail-Safe has a patented safeguard against overheating damage. Fail-Safe thermostats are designed with a unique extra stroke that allows operation in two stages: Stage 1: Within normal operating temperatures, the Fail-Safe operates the same as any other thermostat. Stage 2: When overheating is caused by a deteriorating cooling system part, the Fail-Safe has a secondary stroke that activates a precision engineered piston that automatically locks the valve into a wide open position allowing coolant to circulate freely. Don’t be stranded on the side of the road because your engine overheated and your conventional thermostat failed in the closed position keeping coolant from flowing to the engine. Buy the best Thermostat on the market, the Fail-Safe Thermostat from Motorad. Why is the Fail-Safe the best thermostat? Under normal operating temperatures, the Fail-Safe operates in the same manner as a conventional thermostat. However, when your vehicle overheats due to a deteriorating cooling system part, a standard thermostat locks in the closed position blocking the flow of coolant to the engine. Motorad’s patented Fail-Safe Thermostat is the only thermostat that automatically locks in the open position allowing coolant to circulate freely throughout the engine during the overheating process. This can protect your engine from a more costly repair. Once the Fail-Safe thermostat does its job of allowing coolant to continue to flow to the engine during an overheating by locking in the open position, you must replace it with a new one. There are standard thermostats, then there is the Motorad Fail-Safe Thermostat. Ask for MotoRad’s Fail-Safe Thermostat the next time you need a new thermostat. Brand: MotoRad Part Number: 7304-170 UPC: 055644730479 Alternate MPN: 7304170 ### Vehicle Fitment Table Year Make Model Position Fitment Precision Note 2001 Audi A4 2000 Audi A6 2001 Audi A6 2001 Audi S4 2003 Audi S6 2004 Audi TT 2005 Audi TT 2006 Audi TT 2008 Audi TT 2009 Audi TT 1993 BMW 5-Series 2004 Porsche Cayenne 2005 Porsche Cayenne 2006 Porsche Cayenne 2003 Seat Alhambra 2004 Seat Alhambra 2005 Seat Alhambra 2007 Seat Alhambra 2008 Seat Alhambra 1997 Volkswagen Eurovan 2002 Volkswagen Eurovan 1995 Volkswagen Golf 1996 Volkswagen Golf 1997 Volkswagen Golf 1995 Volkswagen Jetta 1996 Volkswagen Jetta 1997 Volkswagen Jetta 2001 Volkswagen Jetta 2002 Volkswagen Jetta 2004 Volkswagen Jetta 1995 Volkswagen Passat 1996 Volkswagen Passat 1997 Volkswagen Passat 2001 Volkswagen Passat 2002 Volkswagen Passat 2003 Volkswagen Passat 2004 Volkswagen Passat 2005 Volkswagen Passat ### FAQ **Will this fit my vehicle?** Please verify your year, make, model, position, and any fitment notes using the Vehicle Fitment Table above before purchase. **What part number is this?** The listed part number is 7304-170. **Is this product designed for direct replacement?** Yes. This product is intended to match the compatible vehicle applications listed in the fitment table. **Should I confirm fitment before ordering?** Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering. ### Common Searches - Fail Safe™ Series Thermostat for Audi A4 - 7304-170 fitment - MotoRad Fail Safe™ Series Thermostat - 2001 Audi A4 Fail Safe™ Series Thermostat ## Details - **Price:** 45.69 CAD - **Vendor:** MotoRad - **Type:** Fail Safe™ Series Thermostat - **Tags:** 1993 BMW 5-Series, 1995-1997, 1995-1997 Volkswagen Golf, 1997, 2000-2001 Audi A6, 2001 Audi A4, 2001 Audi S4, 2001-2002, 2001-2005 Volkswagen Passat, 2002 Volkswagen Eurovan, 2003 Audi S6, 2003-2005, 2004 Volkswagen Jetta, 2004-2006, 2004-2006 Porsche Cayenne, 2007-2008 Seat Alhambra, 2008-2009 Audi TT, 7304-170, Automotive, Fail Safe™ Series Thermostat, MotoRad ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 45.69 CAD | In stock | ## Images - MotoRad 7304-170 Fail Safe™ Series Thermostat for 1993-2009 Audi A4 --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/motorad-7304-170-fail-safetm-series-thermostat) > Updated: 2026-08-17