1.8t 

8d1721523e

8D1721523E refers to an electronic accelerator pedal for Volkswagen, Audi, and other VAG (Volkswagen-Audi Group) vehicles. It is used in cars equipped with a "drive-by-wire" system, which uses a sensor to transmit the pedal's position electronically to the engine control unit (ECU)

Years and fitment
Part type: Accelerator pedal assembly with a pedal position sensor.
Vehicle models and years:
Volkswagen Passat (B5/B5.5 platform): Fits various models manufactured from 1997 to 2005.
Audi A4 (B5 platform): Fits models from 1999 to 2001.
Audi A6 (C5 platform): Fits models from 1998 to 2004.
Skoda: Compatible with certain Skoda models, typically those based on the same platforms as the listed Volkswagen and Audi vehicles.
Transmission type: This pedal is typically for vehicles with a manual transmission. However, it is always best to double-check based on the vehicle's specific engine and transmission combination.
Associated part number: This part is often referenced alongside the Hella part number 6PV 008 375-03

Symptoms of failure
If this part begins to fail, it can cause problems similar to those experienced with a faulty throttle body, including:
An illuminated "Check Engine" light
Entering limp mode (a restricted power setting to protect the engine)
Erratic acceleration, such as hesitation or surging
Rough idling