5 Best OBD2 Scanners for Checking a Used Car in 2026
Plug in before you buy and see what the seller didn't tell you.
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The quick list
The most-recommended Bluetooth scanner for DIYers.
Turns your phone into a scan tool.
FIXD translates codes into plain English and tracks maintenance.
A standalone tablet that reads all systems, not just the engine.
$149.99 at Innova
A shop-style tablet that can run tests on parts, not just read codes.
A scanner in your pocket can show stored codes and problems with the ABS, airbags or tire sensors before you hand over cash. The BlueDriver Bluetooth Pro reads all of those on your phone, the Innova CarScan Mobile explains engine codes in plain English, and FIXD is the simplest.
An OBD2 scanner plugs in under your dashboard and reads the codes behind a check engine light, so you know whether it's a loose gas cap or something serious. We compared five popular scanners from Innova, BlueDriver, FIXD and TOPDON.
1. BlueDriver Bluetooth Pro OBD2 Scanner
The most-recommended Bluetooth scanner for DIYers.
Specifications
- Type: Bluetooth + phone app
- Reads: engine, ABS, SRS, TPMS
- Fees: no subscription
Today's best deal
Reasons to buy
- ABS, airbag, TPMS
- No subscription
- Great repair reports
Reasons to avoid
- Costs more than the CarScan Mobile
It reads ABS, airbag and TPMS codes from your phone with no subscription.
2. Innova CarScan Mobile 1000 Bluetooth OBD2 Scanner
Turns your phone into a scan tool.
Specifications
- Type: Bluetooth dongle + phone app
- App: RepairSolutions2
Today's best deal
Reasons to buy
- Uses your phone
- Suggests fixes
- $20 off
Reasons to avoid
- Needs your phone every time
Plug it in, open the RepairSolutions2 app, and see codes along with likely fixes. For most drivers this is all you need.
3. FIXD Bluetooth OBD2 Scanner
FIXD translates codes into plain English and tracks maintenance.
Specifications
- Type: Bluetooth + phone app
- Reads: check engine codes in plain English
Today's best deal
Reasons to buy
- Very easy
- Maintenance reminders
Reasons to avoid
- Best features need a subscription
The extras need a paid membership.
4. Innova SD35 All System OBD2 Tablet
A standalone tablet that reads all systems, not just the engine.
Reasons to buy
- All-system scan
- No phone needed
Reasons to avoid
- No bidirectional tests
Lives in the glovebox, no phone needed.
5. TOPDON ArtiDiag900 BT Bidirectional Scan Tablet
A shop-style tablet that can run tests on parts, not just read codes.
Specifications
- Screen: 7-inch tablet
- Connection: Bluetooth
- Coverage: all systems, 130+ brands
- Service functions: 28
- Advanced: bidirectional tests, ECU coding
- Updates: 2 years free, then $249/year
Today's best deal
Reasons to buy
- Bidirectional tests and ECU coding
- Wireless Bluetooth adapter
- Covers 130+ brands
Reasons to avoid
- Updates cost $249 a year after two years
The ArtiDiag900 BT connects over Bluetooth, scans every system on 130+ brands, and does bidirectional tests and ECU coding. TOPDON includes two years of updates.
Compare them side by side
| Scanner | Price | Type | Best for |
|---|---|---|---|
| Innova CarScan Mobile 1000 | $99.99 | Bluetooth | Most drivers |
| Innova SD35 | $149.99 | Tablet | All systems |
| BlueDriver Pro | $139.95 at BlueDriver | Bluetooth | ABS/SRS, no fees |
| FIXD | $59.99 at FIXD | Bluetooth | Beginners |
| TOPDON ArtiDiag900 BT | $599 at TOPDON | Bidirectional tablet | Serious DIY |
How to choose
Just the check engine light? A Bluetooth dongle like the CarScan Mobile is plenty.
ABS, airbag, transmission? Get an all-system tool.
Doing your own repairs? Bidirectional controls save time confirming a diagnosis.
The bottom line
For most drivers, the Innova CarScan Mobile 1000 at $99.99 is the pick. Want a dedicated tool in the glovebox? Get the Innova SD35. Doing your own repairs? The TOPDON ArtiDiag900 BT runs shop-level tests.
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How we pick
We line up the models people actually buy and compare them on value, diagnostics, ease of use, extras.