A Kenworth 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. On a Kenworth those first three characters are almost always 1XK, 1NK, 2NK — 87% of the 78 VINs decoded here start with one of them.
Got a VIN from another make? The free VIN decoder reads any 17-character VIN, whatever built it.
How to read a Kenworth VIN
Here is a real 2028 Kenworth VIN from our database, split into its parts:
VIN 3WKAD98X4WF500138 — decoded free on its own report page.
| 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. |
Which Kenworth is it? Read the first three characters
Characters 1–3 are the World Manufacturer Identifier, and Kenworth runs 6 of them across 4 countries, so on a Kenworth the prefix alone tells you which line the car came off and what body it was built as. Counted across 78 Kenworth VINs decoded here:
| WMI | Built in | Vehicle type | Models under this code | VINs on file |
|---|---|---|---|---|
| 1XK | United States | Truck | C5 Series, T4 Series, T6 Series, T680, T8 Series + 5 more | |
| 1NK | United States | Incomplete Vehicle | T4 Series, T600, T8 Series, T800, T880 | |
| 2NK | Canada | Incomplete Vehicle | C5 Series, T280, T3 Series, T300, T600 | |
| 3WK | Mexico | Truck | T6 Series, T600, T680, T800 | |
| 3BK | Mexico | Incomplete Vehicle | KW45/KW55, T3 Series | |
| SFN | United Kingdom | Truck | Other Off-Highway, T680 |
Country and vehicle type come from the NHTSA manufacturer registry; the model column is counted from Kenworth VINs decoded on ForCar, so it reflects what people actually own, not the full production catalogue.
Model-year codes for Kenworth
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which for Kenworth has already happened — 1998 and 2028 share the character W. All 37 model years of Kenworth, 1992 to 2028, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 2028 | W | 1998 |
| 2027 | V | 1997 |
| 2026 | T | 1996 |
| 2025 | S | 1995 |
| 2024 | R | 1994 |
| 2023 | P | 1993 |
| 2022 | N | 1992 |
| 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 | — |
When two years share a character, the check digit and serial range tell them apart — that is what the decoder does automatically.
Body and engine characters we see on Kenworth VINs
Positions 4 through 8 describe the build, and manufacturers assign them themselves — the same letter means different things on different marques. Across 78 VINs Kenworth uses 16 different characters in these three slots alone — the ones below, ordered by how much of the Kenworth fleet each covers:
| Position | Characters seen on real VINs | Variety |
|---|---|---|
| 4 — body | Y (29%) · D (13%) · W (13%) · H (10%) · Z (10%) · A (9%) | 6 distinct |
| 5 — series | D (59%) · H (15%) · L (13%) · X (6%) · P (5%) · G (1%) | 6 distinct |
| 8 — engine | X (96%) · H (1%) · 9 (1%) · 8 (1%) | 4 distinct |
A character that dominates the column usually marks the body style the model was mostly sold in; a spread across several means multiple bodies or engines shared the same platform.
What a decoded Kenworth VIN gets you
Reading the characters is the easy part — the reason to decode a VIN is what sits behind it. For Kenworth that is 139 owner complaints and every recall campaign NHTSA has on record, keyed to the same VIN you just read:
| Data | For this brand | Source |
|---|---|---|
| Recall campaigns | 946 across the brand | NHTSA |
| Owner complaints | 139 filed by Kenworth owners | NHTSA |
| Model years covered | 46 years (1981–2026) | ForCar catalog |
| VINs already decoded | 78 Kenworth VINs on file | ForCar |
Where to find the VIN on a Kenworth
Before hunting for the plate, know what you are looking for: a genuine Kenworth VIN opens with one of 1XK, 1NK, 2NK, 3WK, 3BK, SFN. Four places on a Kenworth carry that number, and all four must read the same — a mismatch on this brand 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 |
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Frequently asked questions
Is this Kenworth VIN decoder free?
Yes — decoding a Kenworth VIN costs nothing and needs no account. Beyond the year, plant and build characters you also get what NHTSA holds on the Kenworth — 946 recall campaigns and 139 owner complaints — at no charge.
What do the first three characters of a Kenworth VIN mean?
That block is the World Manufacturer Identifier, and on a Kenworth it resolves to one of 6 codes — each tying the car to a plant country and a body type before you read any further. The ones that turn up most on Kenworth VINs here are 1XK (United States — C5 Series, T4 Series, T6 Series); 1NK (United States — T4 Series, T600, T8 Series); 2NK (Canada — C5 Series, T280, T3 Series). The full list, with the models built under each, is in the table above.
Where was my Kenworth built?
Character 11 names the plant, but the country is already set by characters 1–3. Of the 78 Kenworth VINs decoded on ForCar, assembly splits as United States 73%, Canada 14%, Mexico 10%, United Kingdom 3%. Match your first three characters to the table above to see which one is yours.
How many characters is a Kenworth VIN?
Seventeen, on every Kenworth built from 1981 onwards, when the 17-character format became mandatory in the US. The oldest Kenworth VIN on file here is a 1992, so everything in our Kenworth data already uses the modern layout.
Why do two Kenworth model years share the same VIN character?
Position 10 cycles through the alphabet every 30 years, skipping I, O, Q, U and Z. For Kenworth that is not theoretical: a 1998 and a 2028 both carry W in position 10, and this brand was built in both years. The check digit and serial range separate them.
Can a Kenworth VIN tell me if the car was in an accident?
Not from the characters themselves — they describe how the Kenworth 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 139 complaints Kenworth 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 Kenworth?
No, and that is the usual mistake — positions 4–8 are assigned per model, not per brand. A letter that means one body on a Kenworth means something else entirely on another marque. On Kenworth VINs the character that dominates position 4 is Y — read it against the table above, not against a generic chart.
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 Kenworth check the prefix first: if the first three characters are not one of the 6 codes listed above, the plate did not come from this brand at all. 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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