Where is the VIN number in Audi A4 (B7 (8E))?

This guide shows where to find the VIN (chassis number) on the Audi A4 B7 (8E) (2005–2007) so you can confirm the vehicle identity and scan it accurately with your phone.

Chassis Number Locations

1) Engine Bay – Stamped Chassis Number (Firewall / Plenum Chamber)

• Where to look: Open the hood and go to the rear of the engine bay at the firewall. The VIN is stamped into the metal shelf/plenum chamber, slightly right-of-center (when standing in front of the car facing the engine), forward of the battery area and near the positive jump terminal. You may need to lift a rubber/plastic flap or weather seal to see the full alphanumeric string.
• Access: Expect dust/road grime buildup here. The stamping can be partly covered by the seal—lift it and scrub/wipe the metal before reading. On older cars, watch for surface rust that makes characters faint.
• Note: This location is consistent across steering configurations; the demo car is RHD, but the firewall/plenum stamping is in the same general engine-bay area.
• Tip: If the stamp is dirty or low-contrast, wipe it clean and then use the High Contrast scan mode to read the stamped VIN directly instead of trying to guess faded characters.

2) B-Pillar / Door Jamb VIN Sticker (Lower B-Pillar)

• Where to look: Open the front door and check the lower B-pillar/door jamb area near the sill. Look for a black sticker with white text (sometimes on a silver backing).
• Access: It sits low down, so you’ll likely need to crouch. These stickers can get scuffed from shoes and are often in shadow under the door frame—use extra light.
• Note: The sample shown is RHD; on many LHD cars this label is still on a B-pillar/door jamb area—check both sides if you don’t see it immediately.
• Tip: Because this area is often dark, turn on flash and scan the sticker with your phone to avoid misreading small characters.

3) Dashboard / Windshield (Visible VIN Plate)

• Where to look: Check the lower corner of the windshield where the dash meets the glass (a “visible VIN” window on many markets).
• Access: Main issues are glare/reflections and a dirty windshield. Try viewing from outside with the sun behind you.
• Note: This spot wasn’t shown in the Audi-specific footage, but it’s a common visible VIN location on many EU/US vehicles.
• Tip: If reflections wash out the digits, quickly capture the VIN through the glass so you don’t transpose characters by hand.

Video Guide

Video Tutorial: Audi A4 chassis number location ! Audi A4 engine ... - YouTube

▶ Watch Audi A4 VIN Location Guide

• A mechanic shows the B-pillar VIN sticker and the stamped chassis number in the engine bay, including lifting the seal to expose the full code.

Common Problems & Troubleshooting

• Grime/rust on the engine-bay stamping: Scrub the area with a rag (and mild cleaner) before reading—road dust packs into the stamped characters.
• Seal/trim hiding characters: If you only see part of the VIN, lift the rubber/plastic weather strip along the plenum shelf to reveal the full string.
• Sticker not trustworthy or missing: Door-jamb stickers can be replaced; always cross-check the stamped chassis number against paperwork before buying.

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