A Saturn Ion 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 Ion VIN here and you also get its 35 recall campaigns and 3,502 owner complaints filed with NHTSA — free.
How to read a Saturn Ion VIN
Here is a real 2007 Saturn Ion VIN from our database, split into its parts:
VIN 1G8AJ55F87Z173194 — 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. |
Where Saturn Ion VINs say the car was built
The first three characters are the World Manufacturer Identifier. Across 4 Saturn Ion VINs we have on file, these are the codes that actually show up — and the plants behind them:
| WMI | Built in | Vehicle type | VINs on file | Share |
|---|---|---|---|---|
| 1G8 | United States | — | 4 |
Country and vehicle type come from the NHTSA manufacturer registry. Share is measured across VINs decoded on ForCar, not production volume.
Model-year codes for the Saturn Ion
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which the Saturn Ion has not yet outlived — its 4 years still map one-to-one. All 4 model years of the Saturn Ion, 2004 to 2007, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 2007 | 7 | — |
| 2006 | 6 | — |
| 2005 | 5 | — |
| 2004 | 4 | — |
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 Saturn Ion VINs
Positions 4 through 8 describe the build, and manufacturers assign them themselves — the same letter means different things on different marques. Across 4 VINs the Saturn Ion uses 5 different characters in these three slots alone — the ones below, ordered by how much of the Saturn fleet each covers:
| Position | Characters seen on real VINs | Variety |
|---|---|---|
| 4 — body | A (100%) | 1 distinct |
| 5 — series | J (50%) · N (25%) · W (25%) | 3 distinct |
| 8 — engine | F (100%) | 1 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 Saturn Ion VIN gets you
Reading the characters is the easy part — the reason to decode a VIN is what sits behind it. For the Saturn Ion that is 3,502 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 | 35 campaigns | NHTSA |
| Owner complaints | 3,502 filed | NHTSA |
| Fuel economy | 26 mpg combined (avg) | EPA |
Where to find the VIN on a Saturn Ion
A Saturn Ion VIN normally opens with 1G8. Four places on the car carry the full number, and all four must agree — on a Saturn Ion, a plate that disagrees 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 Saturn Ion VIN decoder free?
Yes — decoding a Saturn Ion VIN costs nothing and needs no account. Beyond the year, plant and build characters you also get what NHTSA holds on the Saturn Ion — 35 recall campaigns and 3,502 owner complaints — at no charge.
How many characters is a Saturn Ion VIN?
Seventeen, on every Saturn Ion built from 1981 onwards, when the 17-character format became mandatory in the US. The oldest Saturn Ion VIN on file here is a 2004, so everything in our Saturn data already uses the modern layout.
Why do two Saturn Ion model years share the same VIN character?
Position 10 cycles through the alphabet every 30 years, skipping I, O, Q, U and Z. A 1995 and a 2025 car can carry the same letter. The check digit and serial range separate them.
Can a Saturn Ion VIN tell me if the car was in an accident?
Not from the characters themselves — they describe how the Saturn Ion 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 3,502 complaints Saturn Ion 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 Saturn?
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 Saturn Ion can mean a different one on another Saturn, and something else again on another marque. On Saturn Ion VINs the character that dominates position 4 is A — 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 Saturn Ion check the prefix first: a genuine one opens with 1G8, and a plate that starts otherwise did not come off this car. 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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