Research note: this review is compiled from public specifications, verified customer feedback, and expert sources. AutoRelab does not purchase products at retail or perform hands-on lab testing.
Research notes
Quick answer: The ANCEL BD310 is our top pick for most beginners. It works as a handheld reader, a phone app and a dashboard gauge. It cannot run bidirectional tests (commands sent from the scanner to car parts) or advanced service resets, so it suits reading and clearing codes rather than deep repairs.
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Fitment note: Confirm that a scanner supports your exact vehicle year, make and model before you buy. Also check that your phone or tablet meets the app requirements for any Bluetooth model.
| Award | Product | Best for | Type | Key point |
|---|---|---|---|---|
| Best overall | ANCEL BD310 | Beginners who want display options | Handheld plus Bluetooth app | Works as a reader, an app and a live dashboard gauge. |
| Best budget | V519 OBD2 Scanner | Basic engine code checks | Corded handheld | Reads engine codes and live data on its own screen, no phone needed. |
| Best Bluetooth phone-based | Topdon TopScan Pro | Pocket smartphone diagnostics | Bluetooth dongle | Full system scans and active tests from a phone app. |
| Best for ABS and airbag coverage | Foxwell NT604 Elite | The four core systems | Corded handheld | Covers engine, transmission, ABS and airbag (SRS) systems. |
| Best step-up bidirectional tool | Xtool A30M | DIY active component testing | Bluetooth dongle | Active tests and service resets, with free lifetime updates. |
| Best pro-level tablet | Xtool IP919 Pro | Serious DIYers and shops | Tablet | 10.1-inch Android tablet with ECU coding and key programming. |
How did we choose these scanners?
Our picks reflect what independent reviewers and maker specifications report. We have not hands-on tested each product.
- Diagnostic depth: engine codes, full system scans and live sensor data.
- Usability: clear menus, a built-in screen, or a stable phone app.
- Long-term value: update policy and subscription fees.
- Safety coverage: the ability to read ABS and airbag (SRS) systems.
Which OBD2 scanner should you buy?
If you want one versatile tool with a dashboard gauge mode, pick the ANCEL BD310.
If you only need an inexpensive corded reader for check engine lights, choose the V519 OBD2 Scanner.
If you want to run active tests from your phone, choose the Topdon TopScan Pro, and note the yearly plan after the first year.
If you need to diagnose ABS and airbag lights, choose the Foxwell NT604 Elite.
If you want bidirectional control without subscriptions, choose the Xtool A30M.
If you want a shop-grade tablet with ECU coding and key programming, choose the Xtool IP919 Pro.
Terms in plain words: OBD2 is the standard diagnostic port on cars sold in the US from the 1996 model year on. A DTC is a trouble code that explains a warning light. ABS is the anti-lock brake system and SRS is the airbag system. Bidirectional means the scanner can command a part, such as a fan or fuel pump, to test it. ECU coding means changing settings in a control module. CAN FD is a faster data protocol used on some newer cars.
OBD2 scanner reviews
ANCEL BD310
Best overall
What it is and what it is used for: The ANCEL BD310 is a compact OBD2 scanner that works three ways: as a handheld reader, with a phone app over Bluetooth, and as a live gauge on the dash. It reads and clears trouble codes on 1996 and newer vehicles, shows live engine data and runs a battery test.
How it is used: Plug it into the OBD2 port and use its 2-inch screen, or switch it to Bluetooth and use the ANCEL app. A magnetic mount holds it on a vent or the dash so it can show live data while you drive.
Why it made the list: It stands out for doing three jobs in one small unit. The app is easier to read than the handheld screen, and the dash mount turns it into an extra gauge.
Check before you buy: Make sure the cable reaches the spot where you plan to mount it.
Drawbacks: It cannot run bidirectional tests and has no service resets such as ABS bleeding or electric parking brake calibration. On some vehicles it connects more easily through the app than on its own screen.
Skip it if: You need active component tests or module programming for shop-level repairs.
V519 OBD2 Scanner
Best budget
What it is and what it is used for: The V519 is an entry-level handheld for quick engine checks. It reads and clears check engine codes, shows live sensor data and freeze frame data, checks I/M readiness and tests battery voltage. It reads the engine only.
How it is used: Plug the built-in cable into the OBD2 port under the dash. It powers on right away, and you move through the menus with buttons.
Why it made the list: The big win is the price. You get a color screen and a built-in code lookup library with no phone and no subscription, in a body small enough for a glove box.
Check before you buy: Amazon lists several V519 versions, so match the model and vehicle coverage on the listing you choose.
Drawbacks: It cannot read ABS or airbag modules, and it does not do service relearns, which recalibrate a sensor after a part change.
Skip it if: You need to troubleshoot brakes, airbags or the transmission.
Topdon TopScan Pro
Best Bluetooth phone-based
What it is and what it is used for: The Topdon TopScan Pro is a pocket-sized Bluetooth dongle that turns your phone into a scanner. It runs full system scans, bidirectional active tests and 13 service resets, and it supports CAN FD.
How it is used: Plug the dongle into the OBD2 port, pair it by Bluetooth and run everything from the phone app, including graphs.
Why it made the list: You get bidirectional tests at a low entry price, plus repair guidance in the app for the codes it finds.
Check before you buy: Amazon also sells a cheaper TopScan Lite, so make sure you pick the Pro. Check that your phone meets the app requirements.
Drawbacks: Advanced features are free for the first year, then need a yearly plan. Core diagnostics stay free.
Skip it if: You dislike phone-dependent tools or want to avoid yearly renewals.
Foxwell NT604 Elite
Best for ABS and airbag coverage
What it is and what it is used for: The Foxwell NT604 Elite is a corded handheld that scans four systems: engine, transmission, ABS and airbag (SRS). It reads and clears codes on those modules across more than 60 car brands.
How it is used: Connect the cable to the OBD2 port under the dash and move through the menus with the buttons. Auto VIN identifies the car for you.
Why it made the list: It comes with a hard storage case and free lifetime updates, and you get ABS and airbag codes without an app or a subscription.
Check before you buy: Confirm that four-system scanning is supported for your make and model year.
Drawbacks: It has no service functions such as oil or parking brake resets, and it has no bidirectional tests.
Skip it if: You need service resets or active component testing.
Xtool A30M
Best step-up bidirectional tool
What it is and what it is used for: The Xtool A30M is a Bluetooth dongle for deeper diagnostics. It runs full system scans, bidirectional active tests and service resets from the AnyScan app on iOS and Android.
How it is used: Plug it into the OBD2 port, pair it with your phone and run scans, graphs and component tests from the app.
Why it made the list: Updates are free for life, with no subscription. Active tests on actuators, pumps and valves are its strength, and the V2.0 dongle adds a voltage display and a flashlight.
Check before you buy: The dongle pairs with one phone at a time, so decide which device will be the scan tool.
Drawbacks: App setup and the activation code can feel clunky, and it is not an ECU programming tool.
Skip it if: You want a standalone scanner with its own screen or need ECU programming.
Xtool IP919 Pro
Best pro-level tablet
What it is and what it is used for: The Xtool IP919 Pro is a tablet-style scan tool for serious DIYers and shops. It runs full system scans, bidirectional tests, ECU coding and key programming, and it supports CAN FD.
How it is used: Connect the wireless interface or cable to the car and work from the 10.1-inch Android touchscreen.
Why it made the list: It is built for speed and depth, with an eight-core processor, 128 GB of storage and three years of free updates from the maker.
Check before you buy: Amazon lists the IP919 Pro V2.0, the IP919 MAX and older versions, so match the exact model before you buy.
Drawbacks: It is heavy and complex next to a basic code reader, and far more tool than most casual owners need.
Skip it if: You only need basic check engine light resets on newer cars.
Safety: Never clear trouble codes just to hide a problem before you sell or drive a car. If the ABS or airbag warning light stays on, get the car checked before you rely on its brakes or airbags.
Common mistakes when buying an OBD2 scanner
- Skipping the compatibility check: confirm coverage for your exact year, make and model.
- Paying for features you will not use: ECU coding is rarely needed by a beginner.
- Missing subscription costs: check what happens when the free update period ends.
- Expecting a basic reader to see ABS or airbags: engine-only tools cannot read those modules.
Frequently asked questions about OBD2 scanners
What is OBD2?
OBD2 is the standard diagnostic system on cars sold in the US from the 1996 model year on. It monitors the engine, sensors and emissions equipment, and a scanner reads its trouble codes.
Do I need bidirectional control?
Only if you want to command parts such as a fuel pump or cooling fan to test them. If you only read and clear codes, you do not need it.
Are phone scanners as good as handhelds?
Phone dongles give detailed graphs and portability. Handhelds do not depend on your phone battery, the app or Bluetooth pairing, so they are simpler for a glove box.
Do OBD2 scanners need a subscription?
Some do. The Xtool A30M and Foxwell NT604 Elite include free lifetime updates, while the Topdon TopScan Pro is free for the first year and then needs a yearly plan for its advanced features. Check that core functions still work if updates lapse.
Will an OBD2 scanner work on my car?
Most work on 1996 and newer passenger cars and light trucks sold in North America. Check the maker’s coverage list for your exact vehicle before you buy.
Our verdict
For most beginners the ANCEL BD310 is the best all-round choice because it gives you three ways to use one tool. Pick the V519 if you only need a simple corded reader. Choose the Foxwell NT604 Elite for ABS and airbag lights, and the Xtool A30M or Topdon TopScan Pro if you want active tests from your phone. Always check coverage for your exact car first.
Last reviewed: November 1, 2026.