Free template · no account needed
Car mod list and build sheet template
A build is only documented if someone can reconstruct it later. This sheet records each modification the way a buyer, an insurer, or your future self would want to read it: what the part is, who made it, what it cost, and when it went on and at what mileage.
The sheet
8 columns · 12 blank rows
Mod list
Vehicle ______________________
| Modification | Brand | Part number | Installed on | Odometer | Cost | DIY or shop | Notes |
|---|---|---|---|---|---|---|---|
| Intercooler upgrade | Wagner Tuning | 200001048 | 2025-09-02 | 71,250 | 890.00 | DIY | Needed new charge pipe clampsexample |
Print it for the glovebox, or open the CSV and keep it in a spreadsheet. Delete the example row.
What each column is for
Modification
The part or change, named the way you would say it out loud.
Intercooler upgrade
Brand
Who made it. The first thing anyone asks about a build.
Wagner Tuning
Part number
The detail that makes a mod list verifiable instead of a story.
200001048
Installed on
Install date. Pairs with mileage to place the mod in the car’s history.
2025-09-02
Odometer
Mileage at install. Tells you how long a part has actually been on the car.
71,250
Cost
Parts, and labor if it went to a shop. Build totals come from this column.
890.00
DIY or shop
Who fitted it. Matters for warranty questions and for resale.
DIY
Notes
Supporting parts it needed, what it replaced, anything you would tell the next owner.
Needed new charge pipe clamps
Other templates
- Vehicle maintenance log template
One row per service. Date, odometer, work, parts, cost, who did it.
- Car build budget worksheet
Estimate against actual, by cost category and stage.
- Vehicle document checklist
The paperwork worth keeping, and when each piece gets asked for.
In the product
BuildBay keeps this as a mod record per vehicle, with receipts and photos attached, and rolls the costs into the build total automatically.
Keep it in one place instead
A sheet works until it does not: the glovebox copy gets wet, the spreadsheet gets forgotten. BuildBay keeps the same fields per vehicle, with receipts and photos attached, private by default.