Where is the VIN number in Audi A4 (B8 / 8K)?

This guide shows the VIN (chassis number) locations on the Audi A4 B8 (8K) produced 2008–2015, including the quick-to-check plates and the more “mechanic-only” stamped number.

Chassis Number Locations

1) Engine compartment (stamped chassis number in plenum chamber)

• Where to look: Open the hood and go to the plenum chamber (the tray area between the engine bay and the windshield). The VIN is stamped into the metal slightly right-of-center when facing the engine (i.e., roughly in front of the passenger seat area).
• Access: You’ll usually need to lift/remove the rubber weather strip and move/pry up the plastic cowling/cover to see the stamp clearly. Expect dirt/leaves and awkward viewing angle near the windshield base.
• Note: On RHD cars, the stamped VIN is still in the same plenum/firewall zone (it does not “swap sides” just because the steering wheel is on the other side).
• Tip: If the stamp is dusty or low-contrast, use the app’s camera with contrast assistance to read it instead of guessing characters—try to scan the stamped VIN in High Contrast AI Mode while shining a light across the letters.

2) Dashboard / windshield VIN plate (region dependent)

• Where to look: Look through the windshield at the bottom corner on the left side of the dash (near the base of the glass).
• Access: Very easy—no tools. The main fight is windshield glare/reflections.
• Note: Some markets may not have a visible windshield VIN plate (you may see a blank/black area instead). If it’s missing, move to the door jamb sticker and the stamped plenum VIN.
• Tip: If reflections wash out the numbers, capture the VIN instantly with your phone so you don’t transpose characters like 8/B, O/0, S/5.

3) B-pillar / door jamb manufacturer sticker

• Where to look: Open a front door and inspect the B-pillar/door jamb area (often lower section). You’re looking for a black or silver manufacturer label listing the VIN, weights, and paint/trim info.
• Access: Usually easy and well-lit. On older cars, the label can fade, peel, or get scratched.
• Note: Location can vary slightly by market (driver/passenger side), so if you don’t see it on one side, check the other front door jamb.
• Tip: This label is great for OCR—use the free VIN reader to scan the sticker rather than typing it by hand.

4) Trunk / boot option-code sticker (spare wheel well)

• Where to look: Open the trunk and lift the floor mat/carpet. Check in or near the spare tire well and the toolkit/foam organizer area for a white paper “vehicle data/PR code” sticker that includes the VIN and option codes.
• Access: Requires unloading/clearing the trunk and lifting panels. Sticker is fragile and can be damaged by moisture or cargo.
• Note: This is a strong backup if the windshield plate is missing or the door sticker is damaged.
• Tip: If the paper is wrinkled or stained, scan it with your phone instead of manually decoding faded print.

5) Service book / paperwork (vehicle data sticker)

• Where to look: Check the owner’s manual folder/glovebox for the maintenance booklet. Many have a “Vehicle Data” sticker (often matching the trunk sticker) and the VIN may also appear on official documents.
• Access: No tools—just find the booklet/documents.
• Note: Paperwork is useful for cross-checking, but always verify against a physical VIN on the car before purchase/registration.
• Tip: For clean, fast entry, scan the VIN from the booklet with OCR rather than retyping long strings.

6) MMI infotainment (digital VIN display)

• Where to look: On many B8 cars with MMI: Car menu → Settings/System → Version information (wording varies). The VIN may be shown in system/version screens.
• Access: Requires battery power and menu navigation; screens can be harder to capture due to refresh/flicker.
• Note: Treat this as a verification point, not the primary legal identifier (physical VINs matter most).
• Tip: If you need to confirm characters you can’t read elsewhere, use the app to store/compare VINs you’ve scanned and spot mismatches quickly.

Video Guide

Video Tutorial: Where is VIN NUMBER Location in AUDI A4 B8 ( 2007 - YouTube

▶ Watch Audi A4 VIN Location Guide

• Clear LHD Audi A4 B8 walkthrough showing the windshield area, the plenum/firewall stamped VIN, and the door jamb sticker.

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

▶ Watch Audi A4 VIN Location Guide

• RHD Audi A4 B8 video focusing on the door jamb sticker and the stamped VIN in the plenum chamber area.

Common Problems & Troubleshooting

• Stamped VIN hard to see in the plenum chamber: Leaves, dust, and glare at the windshield base can hide characters—brush debris away and shine a light sideways across the stamp to make it pop.
• Windshield plate unreadable: Reflections on the glass can obscure the VIN—change your viewing angle or shade the area with your hand.
• Sticker mismatch warning: A door/trunk sticker can be replaced or damaged—for any purchase or identity check, confirm the VIN matches the stamped chassis number.

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