How to decode a 2003 Audi A4 VIN

Characters 1-3 of a 2003 Audi A4 VIN

A World Manufacturer Identifier (WMI) is a unique code utilized to identify the manufacturer of a vehicle. It forms the first three characters of the Vehicle Identification Number (VIN), which gives specifics about the car’s origins. For the 2003 Audi A4, the WMI “WAU” indicates that the car was manufactured by Audi AG, located in Ingolstadt, Germany. This identifier not only specifies Audi as the manufacturer but also classifies the vehicle as a passenger car made within the model years of 1996-2024. The WMI is essential for vehicle tracking, registration, and identification purposes across the globe.

List of WMI Codes for a 2003 Audi A4

WMI: WAU

Model Years Covered: 1996-2024
Example VIN: WAUAC48H03K025466
Manufacturer Name: Audi AG
Vehicle Type: Passenger Car
City: Ingolstadt
State or Province:
Country: Germany

Characters 4-8 are the Vehicle Descriptor Section (VDS) of a 2003 Audi A4 VIN

These characters correspond to components like:

Engine type
Transmission
Model or trim
Body style
Gross vehicle weight range

Below find the known vehicle descriptor codes for a 2003 Audi A4:

Known VDS for a 2003 Audi A4
AC48H	VT68E	JT68E	AT48H	VC58E	JC68E	LT68E	LT58E	LC68E	LC58E
VC68E

Auto manufacturers have some discretion to decide how they want to code this section, but its contents and decoded results are generally consistent.

Character 9 is the “check digit” in a 2003 Audi A4 VIN.

Based on a formula developed by the US Department of Transportation, it helps reduce fraud by ensuring the validity of the VIN.

10th Character in the 2003 Audi A4 VIN — Year Code

Year Code	Year
3	2003

11th Character in the 2003 Audi A4 VIN — Plant Code(s)

Known 2003 Audi A4 Assembly Factory VIN Code(s)

Plant Code	Plant City	Plant State	Plant Country	Plant Company Name	Example VIN
A	Ingolstadt		Germany		WAUVT68E23A330508
K	Karmann - Rheine		Germany		WAUAC48H03K025466

VIN Characters 12 - 17 of a 2003 Audi A4

The final 6 characters in a 2003 Audi A4’s 17-digit VIN are its serial number, which will be unique to every vehicle.

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How to find a 2003 Audi A4’s VIN?

Locating the VIN number on your 2003 Audi A4 is key for identification. Here’s how to find it:

Look at the dashboard on the driver’s side of your Audi A4; the VIN is typically visible through the windshield on a small placard affixed to the dashboard.
Examine the door jamb on the driver’s side of your 2003 Audi A4. You should find a sticker or label with the VIN where the door latches when it is closed.
Check under the hood of your Audi A4. The VIN may also be found on a plate or sticker located on the firewall of the engine compartment.
Review your Audi A4’s service or maintenance records since the VIN is often printed on all service records.
Inspect the trunk area of your 2003 Audi A4—it can be found underneath the trunk lining or on the spare tire well.
Look at your Audi A4’s vehicle title, registration, or insurance papers, as the VIN will be noted on all official vehicle documents.

What info can a 2003 Audi A4 VIN reveal?

Model Year: The VIN can reveal the vehicles model year being the year 2003, providing insights into the age and potential market value of the vehicle.
Model Make and Details: It specifically identifies the vehicle as an Audi A4 quattro, shedding light on the model series and any potential performance or luxury classifications associated with it.
Engine Specifications: Engine details reveal a 1781 CC (or 1.781 L) displacement with a power output starting from 170 hp, attributed to a 4-cylinder engine produced by Audi, indicating the vehicle’s potential performance capabilities.
Safety Features: The vehicle is equipped with advanced safety features, including curtain airbags in the 1st and 2nd rows, front airbags for the driver and passenger in the 1st row, and side airbags for the 1st-row occupants as well, highlighting a focus on passenger safety.
Fuel Type: The primary fuel type for this vehicle is gasoline, which can influence fuel economy and performance considerations.
Plant Information: Assembled in Ingolstadt, Germany, this detail adds an extra layer of heritage and manufacturing quality associated with German engineering.
Vehicle Type and Body Class: Classified as a Passenger Car with a Sedan/Saloon body class, this information assists in understanding the vehicle’s basic structure and potential usage.

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Sample VIN Decode Report for a 2003 Audi A4

Vehicle Spec	Value
Body Class	Wagon
Curtain Air Bag Locations	1st and 2nd Rows
Displacement (CC)	1781
Displacement (CI)	108.683288232
Displacement (L)	1.781000
Doors	4
Engine Brake (hp) From	170
Engine Manufacturer	Audi
Engine Number of Cylinders	4
Front Air Bag Locations	1st Row (Driver and Passenger)
Fuel Type - Primary	Gasoline
Model	A4
Model Year	2003
Other Engine Info	50-St/Can. ULEV emission std. Emissions Certification Test Group: 3ADXV01.8342.
Other Restraint System Info	Active Seat Belt.
Plant City	Ingolstadt
Plant Company Name
Plant Country	Germany
Seat Belt Type	Manual
Series	Avant quattro
Side Air Bag Locations	1st Row (Driver and Passenger)
Vehicle Descriptor	WAUVC68E*3A
Vehicle Type	Passenger Car
Sample_VIN	WAUVC68E03A255002