Here’s a list of Audi / VW relays and their functions. This article will be continually updated and is in no way a complete list.
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Relay # 219 (443951253AA) – Fan Relay
Relay # 395 (8Z0951253) – Multifunction Relay
Depending on the vehicle, relay 395 is used for the horn, fuel pump, water pump, windshield washer unit, etc.
Relay # 645 (4H0951253A) – Multifunction Relay
Depending on the vehicle, relay 645 is used for the rear heated glass, secondary air pump, headlight washer system, power outlet, auxiliary heater, etc.
Relay # 207 (443951254A) – Power Electric Seat Relay
Relay # 192 (1J0955531) – Intermittent Wiper Relay
Relay # 640 (8E0907307F) – Servotronic Relay
Relay # 276 (443919533A) – Heated Seat Relay
Relay # 481 (7L0927841) – ESP / Stability Control Relay
Relay # 475 (07Z907281A) – Glow Plug Relay
Relay # 174 (1H0955529) – Rear Wiper Relay
Relay # 432 (3D0906383) – Battery Relay
Relay # 464 (3D0959485) – Airbag Relay
Relay # 173 (3A0941589) – Daytime Running Lights / DRL Relay
Relay # 191 (1H0953227) – Turn Signal Relay