Standard Ignition AX178 Ambient Air Temperature Sensor

Ambient Air Temperature Sensor for VW and Audi

Standard Ignition AX178 is an ambient air temperature sensor built for direct replacement in a wide range of Volkswagen and Audi applications. It uses a push-on attachment method, a black housing, and a single oval plug-in connector for a clean OE-style connection.

Compatible With Volkswagen Passat, Golf, GTI, Jetta, CC, Tiguan, Eos, Golf City, and R32 models, as well as Audi A3, A4, A5, A6, A8 Quattro, Q5, Q7, R8, S3, S4, S5, S6, S8, TT, and Allroad Quattro applications. This part cross-references DENSO Auto Parts 210-1065 for the same application.

Key Features

• Ambient air temperature sensor for HVAC-related temperature input
• Push-on attachment method for straightforward mounting
• Black finish for OE-style appearance
• Female oval connector with one plug-in connection
• Male blade terminals with 2-terminal design
• No mounting bracket and no wiring harness included

Detailed Description

Standard Ignition AX178 is an ambient air temperature sensor used to provide outside air temperature data to the vehicle’s HVAC and display systems. Accurate ambient temperature input helps the climate control system respond properly and supports correct temperature readouts in the instrument cluster or infotainment display. The AX178 is built with a female oval connector, male blade terminals, and a push-on mounting style for a direct-fit replacement approach on supported Volkswagen and Audi platforms. The part number AX178 is commonly searched for VW Passat ambient air temperature sensor and Audi A6 ambient temperature sensor replacement needs.

What It Helps Solve

• Incorrect outside temperature readings
• Intermittent or missing ambient temperature display
• HVAC control issues tied to faulty temperature input
• Sensor connector or terminal wear at the original unit
• Replacement needs after sensor damage or corrosion

Installation Notes and Tips

Verify connector shape, terminal style, and mounting method before installation. This sensor uses a single plug-in connector and does not include a wiring harness or mounting bracket. Confirm vehicle application by year, make, and model, especially on 2001-2002 Audi A6, A6 Quattro, Allroad Quattro, and 2001 Volkswagen Passat applications with chassis-specific notes. For fitment on 2006-2018 Audi A6, 2005-2014 Volkswagen Jetta, or 2009-2017 Volkswagen Tiguan, match the original sensor location and connector style before replacement.

Quality Assurance

Standard Ignition supplies replacement electrical and HVAC components for OE-style service applications. AX178 is built to match the listed connector, terminal, and mounting characteristics for the confirmed Volkswagen and Audi fitments, including 2002-2010 Volkswagen Passat and 2002-2010 Audi A4 platforms.