Audi 4000 VIN Decoder

Decode any Audi 4000 VIN free in seconds. Type the 17-character VIN above and pull the model year, engine, trim, assembly plant, and open NHTSA recalls. No account, no credit card, no email gate.

“Audi 4000” is the North American badge for what the rest of the world knew as the Audi 80 B2 (factory type 81/85), sold in Europe from 1978 to 1986. Audi’s US importer used its own numeric nameplates in this era, so a car a German buyer registered as an “Audi 80” left the US showroom badged “4000” instead, model years 1980 through 1987: the same relationship as Alfa Romeo badging its 75 as “Milano” for the US, a European model renamed, not redesigned, for one market. Below: real VINs decoded against NHTSA’s vPIC database, the WMI and plant codes those decodes actually returned, a position-by-position guide, and where to find the VIN on the car.

About the Audi 4000

The Audi 80 was redesigned onto the B2 platform in Europe for 1978 and reached North American showrooms for model year 1980, replacing the smaller Audi Fox (the US name for the earlier B1-generation 80). Audi’s US arm was mid numeric-badge phase at the time: the Audi 100 had already become the “Audi 5000” for 1978, and the 80 followed suit as the “Audi 4000.” The name lasted exactly as long as this one generation. When the B3-generation 80 arrived for 1988, Audi USA dropped the numeric badges and sold it as the “Audi 80” and “Audi 90,” the same names Europe had used all along.

Within that one generation, the 4000 covered a wide spread of trims and drivetrains:

Model years (US)	Trim	Engine	Power (approx.)	Notes
1980	4000	1.6L (1,588cc) inline-4, gas	76 hp	First US model year, direct Fox replacement
1981	4000, 4000 5+5	1.7L inline-4 gas; 2.1L inline-5 gas	74-100 hp	“5+5” paired the 5-cylinder engine with a 5-speed manual in a 3-door notchback body
1982-1983	4000, 4000S, 4000S Diesel/Turbo Diesel	1.7-1.8L inline-4 gas; 1.6L inline-4 diesel/turbodiesel	66-74 hp gas; 51-68 hp diesel	5-cylinder gas engine dropped for these years; diesel proved unpopular in the US and was gone after 1983
1984-1987	4000S, 4000CS, 4000S quattro, 4000CS quattro	1.8L inline-4 gas; 2.2L (2,144-2,226cc) inline-5 gas, naturally aspirated	74-115 hp	quattro all-wheel drive introduced mid-1983 production for the 1984 model year; CS trim paired with the 5-cylinder

The 4000 quattro is the model most worth knowing. Audi had launched quattro all-wheel drive on the turbocharged, low-volume Ur-Quattro coupe for 1980, a car that cost roughly twice what a 4000 did. Bringing quattro to the compact 4000 sedan for 1983-1984, using a naturally aspirated version of the 2.2L five-cylinder rather than the coupe’s turbo engine, put genuine AWD traction into an affordable, everyday sedan years before AWD was common in the US market. US sales were modest, commonly cited around a few hundred units a year, but the car is widely credited with establishing Audi’s AWD reputation in North America ahead of the volume quattro would eventually do across the whole lineup.

Audi 4000 WMI codes (positions 1-3)

The first three characters of a VIN form the World Manufacturer Identifier, assigned by SAE on behalf of ISO. We ran real 4000 VINs, pulled from period auction and marketplace listings spanning 1981 through 1987, through NHTSA’s vPIC decoder to confirm this directly rather than assume it:

WMI	Country	Manufacturer	Confirmed on
WAU	Germany	Audi AG	1981, 1984, 1985, 1986, and 1987 model-year 4000 VINs, base and quattro

Every VIN we decoded, quattro and non-quattro alike, returned WAU. Treat any car marketed as an Audi 4000 with a VIN that doesn’t start WAU as suspect, and confirm with the decoder above.

How to read a VIN: position by position

The Audi 4000’s US production run straddles the exact date the federal 17-character VIN standard took effect. FMVSS 115 mandated the 17-character format starting with vehicles built on or after September 1, 1980, which lines up with the 1981 model year for most manufacturers, Audi included. That means true 1980 model-year 4000s, and any very early 1981s built before the cutover, can carry a shorter, pre-standard chassis number rather than the 17-character format below. If your 4000’s VIN is 11 or 13 characters, it predates the standard: see our classic car VIN decoder guide for how to read it. Everything from later in the 1981 model year through the last 4000s built in 1987 uses the standard ISO 3779 layout described here.

Positions 1-3: World Manufacturer Identifier

See the WMI table above. Position 1 identifies the country of assembly, not Audi’s corporate headquarters, though for the 4000 that distinction never mattered in practice: it was built in Germany throughout the run.

Positions 4-8: Vehicle Descriptor Section (VDS)

This is where the factory encodes body and engine data, though it doesn’t map as cleanly as it does on later, computerized-era Audis. Here’s what the VDS actually read on every real 4000 VIN we decoded:

Year	Trim	VDS (positions 4-8)	Real VIN decoded
1981	4000	BB081	WAUBB0813BE038132
1981	4000 5+5	BB081	WAUBB0817BE053734
1984	4000S quattro	FB085	WAUFB0854EA048412
1985	4000S quattro	FB085	WAUFB0850FA140330
1986	4000S sedan	FB081	WAUFB0811GA088351
1986	4000CS quattro	FB085	WAUFB0859GA196414
1987	4000CS (non-quattro)	FB085	WAUFB0858HA025266
1987	4000CS quattro	FB085	WAUFB0852HA024355

A pattern is visible (every CS or quattro VIN we pulled ends 085, the one plain “S sedan” we pulled ends 081), but it’s not one we’ll assert as a hard rule from six examples. NHTSA’s vPIC decode itself returns a generic five-cylinder, 100 hp reading for most of these regardless of whether the listing describes a 1.8L four or a 2.2L five, which tells you something useful: for a pre-OBD car like the 4000, the government’s decode table lacks the granularity Audi’s dealer network had. For a firm engine ID, cross-reference the VDS against a build sheet rather than reading it off position 8 alone.

Position 9: Check digit

The check digit is calculated from the other 16 characters using fixed weighting and modulo-11 math, and it’s the one character that catches typos. Every VIN used in this guide decoded clean through vPIC (“Check Digit (9th position) is correct”); a single mistyped character anywhere in the string breaks the math, and any compliant decoder or DMV will reject the entry.

Position 10: Model year

The 10th character maps to model year on the industry-wide 30-year cycle. Scoped to the Audi 4000’s 1980-1987 US run:

Char	Year	Verified on a real decoded VIN
A	1980	Not found; likely pre-standard VIN (see note above)
B	1981	Yes: WAUBB0813BE038132, WAUBB0817BE053734
C	1982	Not directly verified
D	1983	Not directly verified
E	1984	Yes: WAUFB0854EA048412
F	1985	Yes: WAUFB0850FA140330
G	1986	Yes: WAUFB0811GA088351, WAUFB0859GA196414
H	1987	Yes: WAUFB0858HA025266, WAUFB0852HA024355

I, O, and Q are never used in this position, since they’re easily confused with 1 and 0, though none would otherwise fall between A and H anyway. We couldn’t turn up a checksum-valid, 17-character 1980 or 1982-1983 VIN in period listings to decode directly, so those two rows carry the standard cycle value without a real-world example attached here; nothing about the WMI, plant codes, or engine data above was extended past what we could actually confirm.

Position 11: Assembly plant

A single character narrows the VIN to a specific factory. This is one of the more interesting confirmed findings on this page, since it isn’t the single-plant story you’d expect from a nameplate usually described as simply “built in Ingolstadt”:

Char	Plant	Confirmed on
A	Ingolstadt, Germany	1984 quattro, 1985 quattro, 1986 S sedan, 1986 CS quattro, 1987 CS, 1987 CS quattro
E	Emden, Germany	1981 base 4000, 1981 4000 5+5

Every 1984-and-later VIN we decoded returned Ingolstadt. Both 1981 VINs we decoded, base and 5+5, returned Emden, a VW Group plant that also built the contemporary Passat/Dasher on shared underpinnings. We’re not extending this into a general claim about which years used which plant; it’s exactly what the two batches of real VINs showed, no more.

Positions 12-17: Serial number

The final six characters are the production sequence stamped on that specific car as it left the line. Combined with the previous 11 characters, this makes the full 17-character string unique to one 4000.

Where to find the VIN on an Audi 4000

• Lower-left corner of the windshield, visible from outside the car (standard on 1981-and-later cars built to the federal VIN mandate)
• Driver’s side door jamb, on the data sticker with paint code and equipment codes
• Stamped on the engine bay firewall/bulkhead
• Vehicle title and registration

The windshield and door jamb are fastest to check on a used-car lot or at a show. The firewall stamp, physically part of the body shell, is the one to check against the other two if you suspect a car has been re-tagged, a real possibility on a 40-plus-year-old car that’s changed hands repeatedly. If the car predates the September 1980 VIN mandate, the windshield tag may not be present at all; check the door jamb and title first.

Check recalls and safety information

The Audi 4000 was subject to several NHTSA recall and investigation campaigns during and after its production run, most notably tied to the “unintended acceleration” controversy that also touched the contemporary Audi 5000 in the mid-1980s, which prompted a shift-interlock fix across Audi’s US lineup of the era. To check your specific car:

1. Decode the VIN with the tool above to confirm the exact model year and configuration
2. Cross-reference the 17-character VIN (or the pre-standard chassis number, for earliest cars) with NHTSA’s recall database
3. Contact a shop experienced with classic Audis, since dealer-network recall support for a car this old is effectively gone

Recall repairs are free regardless of vehicle age when a manufacturer campaign is still open, though on a car this old, most original campaigns have long since closed out one way or another.

Frequently asked questions

Why is it called the Audi 4000 instead of the Audi 80?

Audi’s US importer badged several European models with round numbers through the late 1970s and 1980s: the Audi 100 became the “5000,” and when the redesigned 80 (B2 platform) arrived for 1980, it followed the same pattern as the “4000.” Europe kept “80” throughout. Audi USA dropped the numeric badges when the next generation arrived for 1988, selling that car as the “80” and “90,” matching the rest of the world. The 4000 name applies only to this one B2-generation car, 1980 through 1987.

How do I decode an Audi 4000 VIN?

Type the 17-character VIN from the windshield, door jamb, or title into the decoder at the top of this page. If your car was built before the September 1980 federal VIN mandate, it may carry a shorter, pre-standard chassis number instead; see the classic car VIN decoder guide for that case.

Where is the VIN on an Audi 4000?

The lower-left corner of the windshield and the driver-side door jamb sticker are the two easiest spots, both required by federal labeling regulation on 1981-and-later cars. The engine bay firewall carries a physical stamp that should match both.

What made the 4000 quattro significant?

It brought Audi’s quattro all-wheel-drive system, previously reserved for the expensive, turbocharged Ur-Quattro coupe, into an affordable compact sedan starting with the 1984 model year (mid-1983 production). It used a naturally aspirated version of the 2.2-liter inline-five rather than the coupe’s turbo engine, but the drivetrain was the real story: it was one of the earliest AWD compact sedans sold in the US and is widely credited with building Audi’s AWD reputation in North America.

Is the Audi 4000 VIN decoder really free?

Yes. VinDecoderPlus decodes every Audi 4000 VIN free of charge with no sign-up, covering everything the factory (or, for pre-standard cars, the title record) stamped into the number. A full vehicle history report, covering accidents, odometer readings, and prior ownership, is an optional paid upgrade if you need it.

Can an Audi 4000 VIN be faked?

The 17 characters can be retyped on a counterfeit plate, a real risk on a car this old: check that the windshield tag, door jamb sticker, firewall stamp, and title all show the same number. The check digit at position 9 catches most single-character typos, but won’t catch a VIN copied wholesale from a different, similar car. Our guide on checking if a car is stolen by VIN covers verification steps, and VIN decoder vs. vehicle history report explains what a basic decode does and doesn’t tell you.

Did every Audi 4000 come from Germany?

Every VIN we decoded, base and quattro alike, traces to Germany, split between Ingolstadt and Emden depending on model year (see the plant table above). We found no evidence of any other assembly location for the US-market car.

Decode any Audi 4000 VIN free

Type your 17-character 4000 VIN into the decoder at the top of this page for an instant breakdown. To go deeper into VIN structure or check other Audi models:

• Audi VIN decoder hub for the brand-wide guide
• How to read a VIN number for the general standard
• What every character in a VIN means for a position-by-position reference
• Classic car VIN decoder (pre-1981) for pre-standard chassis numbers, relevant to the earliest 4000s
• VIN decoder vs. vehicle history report for what a decode covers versus what it doesn’t
• How to check if a car is stolen by VIN for verifying a used 4000 before you buy
• How the VIN check digit works for verifying a VIN was not mistyped or altered
• VIN formats by country and manufacturer for what the first three characters tell you