How to Match a Used Heavy-Duty Truck Part Before You Order

Used truck parts are a practical way to replace a failed module, switch or gauge, but two parts that look the same are not always interchangeable. Use this checklist before ordering.

1. Match the full part number

Compare every character of the part number, including dashes, letters and revision suffixes. A different suffix can mean different hardware, software or connector layout. If only part of the number matches, ask before ordering.

2. Compare the donor truck

Each listing on Truck Parts Care states the truck the part was removed from, as listed by the supplier. A donor truck of the same make, model and similar year is a good sign, but the part number is still the deciding factor.

3. Check connectors and mounting

Count the connectors and compare their shape, color and pin layout with your part. Check the mounting tabs, brackets and overall size in the photos.

4. Look at every photo

Listing photos show the actual used part offered. Look for damage, missing pins, broken tabs or labels that do not match.

5. Confirm programming needs

Ask your dealer whether the part needs programming or configuration. Read our guide on programming and configuration.

6. Ask if you are unsure

If anything does not match, send us the part number, label photos and your VIN through the Find My Part page before ordering. You can also browse parts by truck make, such as Freightliner, International, Kenworth or Peterbilt.