A Triumph Street Twin VIN is 17 characters. Positions 1–3 say who built it and where, 4–8 describe the body and engine, 9 is a check digit, 10 is the model year, 11 is the plant, and 12–17 are the serial number. Decode a Street Twin VIN here and you also get its 10 recall campaigns and 2 owner complaints filed with NHTSA — free.
How to read a Triumph Street Twin VIN
Every Triumph Street Twin VIN follows the same 17-character layout:
| Position | Section | What it tells you |
|---|---|---|
| 1–3 | WMI | World Manufacturer Identifier — country, manufacturer and vehicle type. |
| 4–8 | VDS | Vehicle Descriptor Section — body style, engine, restraint system, series. |
| 9 | Check digit | A calculated digit that validates the whole VIN. Wrong digit = wrong VIN. |
| 10 | Model year | One character for the model year. Letters skip I, O, Q, U and Z. |
| 11 | Plant | The assembly plant that built the car. |
| 12–17 | Serial | Sequential production number of this exact vehicle. |
Triumph Street Twin VIN prefixes, and when each one was used
Characters 1–3 are the World Manufacturer Identifier. Every Triumph Street Twin we have on record, from 2016 to 2017, carries the same one — SMT, which makes it a quick way to confirm you are looking at a real Street Twin:
| VIN starts with | Years seen | Built in | Vehicle type | VINs on record |
|---|---|---|---|---|
| SMT | 2016–2017 | United Kingdom | Motorcycle |
Counted from the 2 dated Triumph Street Twin VINs attached to NHTSA complaints — the largest such set for this model — with every code checked against the NHTSA manufacturer registry, so mistyped entries are dropped; the figures say how many records carry each code, not how many Street Twins left the line.
Model-year codes for the Triumph Street Twin
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which for the Triumph Street Twin has already happened — 1994 and 2024 share the character R. All 31 model years of the Triumph Street Twin, 1994 to 2024, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 2024 | R | 1994 |
| 2023 | P | — |
| 2022 | N | — |
| 2021 | M | — |
| 2020 | L | — |
| 2019 | K | — |
| 2018 | J | — |
| 2017 | H | — |
| 2016 | G | — |
| 2015 | F | — |
| 2014 | E | — |
| 2013 | D | — |
| 2012 | C | — |
| 2011 | B | — |
| 2010 | A | — |
| 2009 | 9 | — |
| 2008 | 8 | — |
| 2007 | 7 | — |
| 2006 | 6 | — |
| 2005 | 5 | — |
| 2004 | 4 | — |
| 2003 | 3 | — |
| 2002 | 2 | — |
| 2001 | 1 | — |
| 2000 | Y | — |
| 1999 | X | — |
| 1998 | W | — |
| 1997 | V | — |
| 1996 | T | — |
| 1995 | S | — |
When two years share a character, the check digit and serial range tell them apart — that is what the decoder does automatically.
What a decoded Triumph Street Twin VIN gets you
Reading the characters is the easy part — the reason to decode a VIN is what sits behind it. For the Triumph Street Twin that is 2 owner complaints and every recall campaign NHTSA has on record, keyed to the same VIN you just read:
| Data | For this model | Source |
|---|---|---|
| Recall campaigns | 10 campaigns | NHTSA |
| Owner complaints | 2 filed | NHTSA |
| Model years covered | 31 years | ForCar catalog |
Where to find the VIN on a Triumph Street Twin
Four places on a Triumph Street Twin carry it, and all four must read the same — a mismatch is where fraud shows itself first.
| Where | How to see it | Why it matters |
|---|---|---|
| Dashboard, driver side | Through the windshield, bottom corner | Easiest to check before you touch anything |
| Driver door jamb | Open the door, sticker on the pillar | Also lists tyre pressures and build date |
| Under the hood | Firewall or strut tower plate | Survives a windshield replacement |
| Title and insurance | Paper documents | Must match the car — a mismatch means fraud or a swapped panel |
You know what it is. Find out what it's worth.
- Exact value for this VIN, adjusted for mileage
- The original window sticker and factory options
- Full research report as a PDF you can hand to a mechanic
- Decode a whole list of VINs at once
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Frequently asked questions
Is this Triumph Street Twin VIN decoder free?
Yes — decoding a Triumph Street Twin VIN costs nothing and needs no account. Beyond the year, plant and build characters you also get what NHTSA holds on the Triumph Street Twin — 10 recall campaigns and 2 owner complaints — at no charge.
How many characters is a Triumph Street Twin VIN?
Seventeen, on every Triumph Street Twin built from 1981 onwards, when the 17-character format became mandatory in the US.
Why do two Triumph Street Twin model years share the same VIN character?
Position 10 cycles through the alphabet every 30 years, skipping I, O, Q, U and Z. For the Triumph Street Twin that is not theoretical: a 1994 and a 2024 both carry R in position 10, and this model was built in both years. The check digit and serial range separate them.
Can a Triumph Street Twin VIN tell me if the car was in an accident?
Not from the characters themselves — they describe how the Triumph Street Twin left the factory, not what happened to it afterwards. Crash and title records sit in separate databases keyed to the same number. What is public are the 2 complaints Triumph Street Twin owners filed with NHTSA, and those we do show. Run the number through our VIN check to see what is on the record for it.
Do the body and engine characters mean the same thing on every Triumph?
No, and that is the usual mistake — positions 4–8 are assigned per model, not per brand. A letter that means one body on the Triumph Street Twin can mean a different one on another Triumph, and something else again on another marque.
What if the VIN on the dashboard doesn't match the door jamb?
Treat it as a red flag on any car, and on a Triumph Street Twin check the prefix first: for the model year in question it should open with SMT, depending on when the car was built — anything outside that set did not come off a Triumph Street Twin. Beyond that, mismatched plates mean either a replaced panel or a tampered identity — ask for documents and verify before any money changes hands.
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