Best OBD2 Scanners
Bluetooth and handheld OBD2 scanners ranked by diagnostic depth, subscription traps, and reliability.
The most-reviewed scanner in the category by a wide margin, and the app is why: enhanced ABS/SRS/airbag reads plus vehicle-specific Repair Reports drawn from a database of verified fixes. The dongle needs your phone, so there's no standalone screen.
The only genuinely bidirectional tool we evaluated: the MK808S reads every major module (engine, transmission, ABS, TPMS, BCM), runs 3,000+ active component tests and handles 28+ reset services on a dedicated Android tablet. Overkill for a check-engine light, right at home for a serious DIYer or side-shop. Note this is the S revision — the original MK808 is the older, shallower tool and is what most stale round-ups still link.
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Best Overall is an editorial pick, chosen for the job most buyers in this category are actually doing. DriveScore is a published supporting signal, not the tiebreaker — a cheaper, narrower product can out-score the pick and still be the wrong buy. How we rank.
What matters most to you?
Best overall is our editorial pick; the rest are derived from the published sub-scores.
Our editorial pick — the best fit for what most buyers in this category need. The only genuinely bidirectional tool we evaluated: the MK808S reads every major module (engine, transmission, ABS, TPMS, BCM), runs 3,000+ active component tests and handles 28+ reset services on a dedicated Android tablet. Overkill for a check-engine light, right at home for a serious DIYer or side-shop. Note this is the S revision — the original MK808 is the older, shallower tool and is what most stale round-ups still link.
All 5, ranked — deltas vs. the winner
EDITORIAL RANK · DRIVESCORE SHOWN
How to actually pick one
Every OBD2 scanner reads generic engine (powertrain) codes; the real differences are depth and cost-of-ownership. Cheap Bluetooth dongles pair with a phone app and cover basic code read/clear and live data — great for the average driver. The step up is manufacturer-system access (ABS, SRS/airbag, transmission) and bidirectional control (commanding components to run active tests), which DIYers and indie mechanics want. The trap to avoid is the app subscription: some ecosystems lock the useful features behind a recurring fee, so a 'cheap' dongle becomes expensive. Any scanner works only on OBD-II vehicles, which is essentially all US cars from 1996 onward. Reliability of the Bluetooth connection and app quality separate the pleasant tools from the frustrating ones.
What r/MechanicAdvice say
What we didn't pick
Popular options we researched and are not recommending right now, with the specific reason for each.
- Autel AutoLink AL319 (basic OBD-II code reader)
Discontinued by Autel — its own product page says so, and points buyers to the AL329, AL529 and AL629. Even while sold it was engine-systems-only, with no live-data graphing and no bidirectional control.