# MotoRad 304-170 Engine Coolant Thermostat for 1990-2009 Audi A3

### Specifications

Bypass Diameter: 1.37"

Bypass Length: 1.50"

Flange Thickness: 0.05"

Gasket or Seal included: No

Installation Tool Included: No

Jiggle Pin Weep Hole: Yes

Sealing Flange Outside Diameter: 2.64"

Temperature (Degree): 170F

### Features

-   Offer precise pressure control
-   Ensure the proper fit
-   Made of high quality materials
-   Easy installation

### Product Details

Engine Coolant Thermostat (304-170) by MotoRad®. Temperature: 170F. State-of-the-art equipment, strict quality control, and functional testing to each thermostat ensure customers that they can trust the high-quality product used in their vehicle. As cooling system experts, MotoRad knows what is necessary to manufacture a high-quality part that will stand up to the rigors of today’s demanding cooling system environments where others fail.

MotoRad offers a full line of thermostats to replace original equipment thermostats. These parts are manufactured with high-grade duel bridge stainless steel construction and they meet or exceed all original equipment manufacturer requirements. MotoRad also offers standard thermostats in many alternate temperatures.

Brand: MotoRad

Part Number: 304-170

UPC: 055644304700

Alternate MPN: 304170

OE Numbers: AJ85874

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2006-2009

Audi

A3

1996-2001

Audi

A4

1995-2005

Audi

A6

1997-2002

Audi

A8

1990, 1992-1994

Audi

Quattro

2000-2002

Audi

S4

2002-2003

Audi

S6

2001-2003

Audi

S8

2004-2006, 2008-2009

Audi

TT

1991-1995

BMW

3-Series

1993, 1997-1998

BMW

5-Series

2004-2006

Porsche

Cayenne

2003-2005, 2007-2008

Seat

Alhambra

1997, 1999-2000, 2002

Volkswagen

Eurovan

1995-1998, 2000-2004

Volkswagen

Golf

1999, 2005

Volkswagen

Golf GTI

1994-2004

Volkswagen

Jetta

1994-2005

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 304-170.

**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

-   Engine Coolant Thermostat for Audi A3
-   304-170 fitment
-   MotoRad Engine Coolant Thermostat
-   2006 Audi A3 Engine Coolant Thermostat

## Details

- **Price:** 34.09 CAD
- **Vendor:** MotoRad
- **Type:** Engine Coolant Thermostat
- **Tags:** 1990, 1991-1995 BMW 3-Series, 1992-1994 Audi Quattro, 1993, 1994-2004 Volkswagen Jetta, 1994-2005 Volkswagen Passat, 1995-1998, 1995-2005 Audi A6, 1996-2001 Audi A4, 1997, 1997-1998 BMW 5-Series, 1997-2002 Audi A8, 1999, 1999-2000, 2000-2002 Audi S4, 2000-2004 Volkswagen Golf, 2001-2003 Audi S8, 2002 Volkswagen Eurovan, 2002-2003 Audi S6, 2003-2005, 2004-2006, 2004-2006 Porsche Cayenne, 2005 Volkswagen Golf GTI, 2006-2009 Audi A3, 2007-2008 Seat Alhambra, 2008-2009 Audi TT, 304-170, Automotive, Engine Coolant Thermostat, MotoRad

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 34.09 CAD | In stock |

## Images

- MotoRad 304-170 Engine Coolant Thermostat for 1990-2009 Audi A3

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/motorad-304-170-engine-coolant-thermostat)
> Updated: 2026-08-17