Most Mitsubishi Diamante VINs open with 6MM (Australia, 1993–2004) or JA3 (Japan, 1992–1995). Position 11, the plant, shows 2 codes, most often T (80%); a 2026 Diamante carries T in position 10. Decoding one also brings up 7 recall campaigns and 349 owner complaints from NHTSA.
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How to read a Mitsubishi Diamante VIN
Here is a real 1999 Mitsubishi Diamante VIN from our database, split into its parts:
VIN 6MMAP47P3XT004181 — 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. |
Mitsubishi Diamante VIN prefixes, and when each one was used
The Mitsubishi Diamante VINs on record carry 2 different prefixes. The main one is 6MM (Australia, 1993–2004), then JA3 (Japan, 1992–1995):
| VIN starts with | Years seen | Built in | Vehicle type | VINs on record |
|---|---|---|---|---|
| JA3 | 1992–1995 | Japan | Passenger Car | |
| 6MM | 1993–2004 | Australia | Passenger Car |
Position 11 names the plant. On the Mitsubishi Diamante it is not one number either — assembly moved between 2 of them over the years:
| Plant code | Years active | VINs on record | Share |
|---|---|---|---|
| T | 1993–2004 | 280 | |
| Y | 1992–1995 | 64 |
Counted from 346 dated Mitsubishi Diamante VINs attached to NHTSA complaints, each code checked against the NHTSA manufacturer registry.
Model-year codes for the Mitsubishi Diamante
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which for the Mitsubishi Diamante has already happened — 1996 and 2026 share the character T. All 35 model years of the Mitsubishi Diamante, 1992 to 2026, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 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 | — |
| 1998 | W | — |
| 1997 | V | — |
To tell the two apart on a car or light truck, look at position 7: a number for 1980–2009 models, a letter from 2010 on.
Body and engine characters we see on Mitsubishi Diamante VINs
Positions 4–8 are the maker's own build code. Across 1 VINs the Mitsubishi Diamante uses 3 different characters in positions 4, 5 and 8:
| Position | Characters seen on real VINs | Variety |
|---|---|---|
| 4 — body | A (100%) | 1 distinct |
| 5 — series | P (100%) | 1 distinct |
| 8 — engine | P (100%) | 1 distinct |
What a decoded Mitsubishi Diamante VIN gets you
Behind a Mitsubishi Diamante VIN: 349 owner complaints and every recall campaign NHTSA has on record:
| Data | For this model | Source |
|---|---|---|
| Recall campaigns | 7 campaigns | NHTSA |
| Owner complaints | 349 filed | NHTSA |
| Fuel economy | 18 mpg combined (avg) | EPA |
| Model years covered | 35 years | ForCar catalog |
Where to find the VIN on a Mitsubishi Diamante
A Mitsubishi Diamante VIN normally opens with 6MM; the full number sits in four places, and all four must match.
| 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 tire 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 Mitsubishi Diamante VIN decoder free?
Yes, with no account. Besides the year, plant and build characters it shows 7 recall campaigns and 349 owner complaints NHTSA holds on the Mitsubishi Diamante.
Why does my Diamante VIN start differently from another Diamante?
Because the Mitsubishi Diamante was built under several maker codes, by plant and period. Across the Mitsubishi Diamante VINs on record we see 2 of them: JA3 (1992–1995), 6MM (1993–2004). Each is genuine for its years.
What year is my Diamante by its VIN?
Read position 10: a 2026 Diamante carries T, a 2025 Diamante carries S, a 2024 Diamante carries R. A 1996 and a 2026 share T; position 7 tells them apart, a number for 1980–2009 and a letter from 2010 on.
Where was my Diamante built?
Position 11 names the plant. Across 349 dated Mitsubishi Diamante VINs it reads T 80%, Y 18%.
What does position 4 mean on a Mitsubishi Diamante VIN?
It is part of the maker's own build code, so read it against this model, not a generic chart. On 1 Mitsubishi Diamante VINs here, A is the most common character in position 4, on 100% of them.
What if the VIN on the dashboard doesn't match the door jamb?
On a Mitsubishi Diamante check the prefix first: most genuine ones open with 6MM or JA3. A plate that starts with anything else, or disagrees with the other copies of the number, needs documents checked before any money changes hands.
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