Alfa Romeo 155 VIN Decoder

Decode an Alfa Romeo 155 VIN and you are working with a car that never had a single US-market sale. The 155 was built from 1992 to 1997 (with the last cars registered into 1998) for Europe and a handful of other export markets, so there is no NHTSA build record, no US recall history, and no dealer window sticker to check a result against. What it does have is a genuine touring car racing pedigree: as a road car it was the basis for the all-wheel-drive 155 Q4, and as a race car the 155 V6 TI won the German DTM championship in 1992 through 1994 and took the British Touring Car Championship outright in 1992, turning a mid-size Fiat-platform sedan into one of the most successful touring cars of the era.

This page decodes the 17-character VIN structure Alfa Romeo actually used on the 155, checked against real chassis numbers from European dealer and auction listings and run through NHTSA’s vPIC decoder where that tool returns anything at all. Where the evidence contradicts the standard VIN convention, or NHTSA has nothing on file, that gets said plainly rather than papered over with an invented table.

About the Alfa Romeo 155

The 155 (internal type code 167) is a four-door D-segment sedan that replaced the rear-drive Alfa Romeo 75 and was itself replaced by the 156. It was unveiled in January 1992 at a Barcelona press event and launched publicly in March 1992 at the Geneva Motor Show. Unusually for an Alfa Romeo of the period, it was built on the Fiat Tipo Tre platform shared with the Fiat Tempra and Lancia Dedra, a result of Alfa’s absorption into the Fiat Group a few years earlier. Body styling came from Ercole Spada at the I.DE.A Institute. Every 155 was assembled at Alfa Romeo’s Pomigliano d’Arco plant near Naples, in Campania, not at the Arese or Milan facilities more commonly associated with the Alfa Romeo name.

Generation	Years	Notable changes
Series 1 (pre-facelift)	1992-1995	Launch cars; recessed front grille through 1993, flush grille after; 8-valve Twin Spark engines standard; Q4 all-wheel-drive available
Series 2 (“widebody” facelift)	1995-1997/98	Front and rear track widened 26mm with flared wheel arches; new 16-valve cylinder heads; quicker steering rack; Q4 continued in far smaller numbers before being phased out

Total production across both series is generally cited at around 195,500 units. The engine range spanned four-cylinder petrol from 1.6 to 2.0 liters, a V6, and two diesels, none of which were ever certified for US sale:

Engine	Type	Power	Notes
1.6L Twin Spark 16V	Petrol I4	~120 PS	Added post-1995 facelift
1.7L Twin Spark 8V	Petrol I4	~115 PS	Not offered in UK market
1.8L Twin Spark 8V/16V	Petrol I4	129-140 PS	16V head from 1995
2.0L Twin Spark 8V/16V	Petrol I4	143-150 PS	16V head from 1995
2.0L Turbo 16V	Petrol I4	~190 PS	Q4 all-wheel-drive only
2.5L Busso V6	Petrol V6	~166 PS	Top-tier trim
2.0L TD	Diesel I4	~90 PS	Fiat-derived
2.5L VM Motori 425	Diesel I4	~125 PS	OHV, VM-sourced

The Q4 is the variant most searched for by enthusiasts: its 2.0-liter turbo paired with a three-differential all-wheel-drive system, open front diff, epicyclic center diff with a Ferguson viscous coupling, and a Torsen self-locking rear diff, lifted almost wholesale from the Lancia Delta Integrale. It was never high-volume and continued at much reduced numbers after the 1995 facelift before being dropped. Alfa and its partners also built a few specialist variants: the 1994 Silverstone homologation special (about 2,500 cars), Zagato’s TI.Z (1993) and turbocharged GTAZ (1995), and a single GTA Stradale prototype by Abarth that never reached production.

Alfa Romeo 155 WMI codes (positions 1 to 3)

Every genuine Alfa Romeo 155 VIN we located and cross-checked begins with the same World Manufacturer Identifier:

WMI	Country	Manufacturer	Notes
ZAR	Italy	Alfa Romeo S.p.A.	Confirmed on real 155 chassis numbers from 1992 and 1994; NHTSA’s own WMI table also returns “Alfa Romeo” for ZAR

ZAR is the same WMI Alfa Romeo has used across decades of Italian-built cars, including the modern Giulia, so the prefix alone doesn’t distinguish a 155 from any other Alfa built in Italy; the characters that follow do that work. We did not find, and are not listing, any second WMI for the 155. If you see a source claiming otherwise, treat it skeptically until you can check it against an actual chassis number.

How to read an Alfa Romeo 155 VIN, position by position

The 155’s VIN is 17 characters long and follows the ISO 3779 structure used worldwide, but because the car was never sold in the US or Canada, it was never subject to FMVSS 565, the American rule mandating a computed check digit at position 9 and a specific model-year letter at position 10. That distinction matters more here than on most pages, so each section below says explicitly what we could confirm and what we could not.

Positions 1 to 3: World Manufacturer Identifier

ZAR on every 155 chassis number we checked. Z places the country of manufacture in Italy under the ISO 3780 country code table, A narrows it to the Fiat/Alfa Romeo group, and R identifies Alfa Romeo passenger cars specifically.

Positions 4 to 8: Vehicle Descriptor Section (VDS)

Two real 155 Q4 VINs we cross-checked, ZAR16700000050327 (a 1992 155 Q4 2.0 Turbo) and ZAR16700001011006 (a 1994 155 Q4), both carry 16700 across positions 4 to 8. The 167 block matches Alfa Romeo’s own internal type code for the 155, so positions 4 to 6 appear to encode the model itself, with both examples sharing the same trailing two characters too. That’s a small sample of a single variant, so we won’t claim a full VDS table from two chassis numbers, but 167 here is a genuine, verified signature of the 155, matching the same type designation used throughout Alfa Romeo’s own parts catalogues.

Position 9: Check digit

On a US-market VIN this position is a computed checksum against the other 16 characters, defined by SAE J853 and enforced by FMVSS 565. It is not a European or ISO 3779 requirement, and the 155 does not appear to use it that way. Both sample VINs above read 0 at position 9, and running either through NHTSA’s vPIC decoder returns an explicit error: “Check Digit (9th position) does not calculate properly.” That’s expected, not a sign of a bad VIN, since a mod-11 check digit was never mandated in the 155’s home markets.

Position 10: Model year

The ISO 3779 and SAE J853 convention assigns a repeating 30-year letter and digit cycle to this position. For the years the 155 was built, that theoretical cycle reads as follows, with no year skipped:

Char	Year
N	1992
P	1993
R	1994
S	1995
T	1996
V	1997

I, O, and Q are never used, since they’re too easily confused with 1 and 0. That table is the correct general-purpose reference for a vehicle encoding model year the standard way. It is not, however, what we found on the real 155 VINs decoded for this page. Both ZAR16700000050327 (a confirmed 1992 car) and ZAR16700001011006 (a confirmed 1994 car) read 0 at position 10, two years apart, with no letter in sight, and NHTSA’s decoder flags exactly that mismatch: “Incorrect Model Year – Position 10 does not match valid model year codes.” Since the 155 was never sold in the US or Canada, it was never legally required to follow the FMVSS 565 letter cycle, and Alfa Romeo simply didn’t apply it here. Treat the table above as the standard reference, not a confirmed decode key. To pin down a real 155’s model year, use the build date on the type-approval plate, the registration paperwork, or an Alfa Romeo specialist club.

Position 11: Assembly plant

Every 155 left the same factory, so in principle a single character should mark that plant consistently. The two verified VINs above disagree, one reads 0 and the other 1, too small a sample to turn into a plant-code table, so we’re not inventing one. What we can confirm independently is the plant itself: multiple sources agree the 155 was built exclusively at Pomigliano d’Arco in Campania. Worth flagging: NHTSA’s vPIC decoder, which has no real 155 records, guesses a plant city anyway from generic WMI-level data, and it guessed differently for each VIN, “Arese” for the 1994 sample and “Modena” (Maserati’s home plant) for the 1992 one. Neither is correct, a reminder that vPIC’s plant field is unreliable outside vehicles NHTSA actually has build data for.

Positions 12 to 17: Serial number

The final six characters are the production sequence number, 050327 and 011006 on the two verified VINs. Combined with the WMI and VDS blocks, this is what makes each 155 chassis number unique, even where positions 9 through 11 don’t carry the meaning a US-market car’s would.

Where to find the VIN on an Alfa Romeo 155

• Stamped on a metal plate in the engine bay, near the front crossmember or bulkhead
• Visible through the windscreen on later Series 2 cars (not universal on early Series 1 examples)
• Driver’s side door pillar, on the type-approval plate, which also lists engine code, paint code, and permitted weights
• Libretto di circolazione (Italian registration document) or the equivalent EU registration certificate
• Any surviving service booklet or dealer paperwork

The engine bay and door pillar plates are the most dependable check, since the 155 predates widespread windshield VIN labeling outside the US. If buying privately, confirm the plate number matches the registration document exactly.

Recalls and safety information

There is no NHTSA recall history for the 155 because it was never imported, sold, or titled in the United States. Safety and recall oversight for a European-market 155 sat with Italy’s Ministero delle Infrastrutture e dei Trasporti and the EU’s type-approval framework of the early-to-mid 1990s, well before today’s rules. A car this old is long past any active recall campaign, and most survivors are maintained by owners’ clubs and independent specialists rather than factory dealers, since official parts support has thinned considerably.

If you’re researching a specific car: decode the VIN with the tool above to confirm what the chassis number tells you, check with an Alfa Romeo owners’ club in the car’s home market (Italy’s Registro Alfa Romeo Italiano and similar national clubs keep informal known-issue archives for older models), and have an independent specialist inspect the timing belt, cooling system, and, on Q4 cars, the viscous coupling and Torsen differential, all known wear points regardless of recall status.

Frequently asked questions

How do I decode an Alfa Romeo 155 VIN?

Enter the 17-character chassis number, found on the engine bay plate, door pillar, or registration document, into the decoder above. Because the 155 was never a US-market car, results are limited to what the WMI and VDS blocks confirm (Alfa Romeo, Italy, model type 167) rather than the full model-year and plant detail a US-titled vehicle would return.

Why wasn’t the Alfa Romeo 155 sold in the US?

Alfa Romeo pulled out of the US market entirely in 1995, partway through the 155’s production run, after years of declining sales that had already reduced its American lineup to a single model, the 164, sold in small numbers. The 155 itself was never certified for US sale under EPA emissions or NHTSA FMVSS standards, and by the time Alfa Romeo returned (with the 8C Competizione in 2008, then broadly with the Giulia in 2017), the 155 had long since been replaced by the 156 and then the 159.

What is the Alfa Romeo 155 Q4?

The all-wheel-drive 155, built around a 2.0-liter turbocharged four-cylinder producing roughly 190 PS and a three-differential AWD system adapted from the Lancia Delta Integrale. It was offered mainly during 1992-1995 and continued in much smaller numbers after the facelift before being discontinued. Standard 155s were front-wheel drive.

Is the Alfa Romeo 155 the same car that won the DTM championship?

Only in silhouette. The 155 V6 TI that won the German DTM title in 1992, 1993, and 1994 (and the British Touring Car Championship outright in 1992) was a purpose-built tube-frame race car with a naturally aspirated 2.5-liter V6 producing well over 400 PS and its own all-wheel-drive system, sharing little more than body shape and badge with the sedan sold to the public.

Is the Alfa Romeo 155 VIN decoder really free?

Yes. VinDecoderPlus decodes the WMI and confirmable VDS data on any 155 VIN free, no account, no credit card. Because this is a non-US-market vehicle, the decode will be more limited than for a car NHTSA has full build records for; where that’s the case, the tool says so rather than guessing.

Decode any Alfa Romeo 155 VIN free

Type your 17-character 155 chassis number into the decoder at the top of this page. For more on Alfa Romeo’s lineup and VIN structure generally:

• Alfa Romeo VIN decoder hub for the brand-wide guide
• How to read a VIN number for the general ISO 3779 standard
• What every character in a VIN means for a position-by-position reference
• Classic car VIN decoder for pre-1981 vehicles and cars whose VINs don’t follow the modern US convention
• 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 verification steps before buying a used 155