The 3 ELM327 Adapters Worth Buying (And the Apps That Make Them Work)
Published: November 24, 2024 · Last updated: May 30, 2026
The 30-second answer
For most people an ELM327 is all you’ll ever need, the trick is not buying the wrong one. Read codes, watch live data, check emissions, all off a phone app for a few euros. The brand matters far more than the price. The Vgate iCar Pro 2s is the cheap entry that just works. The Vgate Vlinker MS is the value pick if you want it talking to more apps across Android, iPhone and Windows. And the OBDLink MX+ is for one specific person: someone who already knows which serious software they’re pairing it with. Buy a no-name dongle instead and connection drops are your own fault.
I earn from qualifying purchases and sometimes get tools for free (full disclosure). It never affects my scoring.
ELM327 Quick picks
Vgate iCar pro 2s 8.5 / 10
updated vgate bluetooth adapter with good compatibility across diagnostic and coding apps
- ✓Updated Vgate adapter line with good compatibility
- ✓Compact low-power design
- ✓Very cheap entry to app-based diagnostics
- ✕Engine-only
- ✕No advanced functions
- ✕Quality still below premium adapters like OBDLink MX+
Vgate Vlinker MS 8.3 / 10
best compromise between budget and power to connect with multiple diagnostic/coding software
- ✓Works well with android/iphone and even windows
- ✓Great alternative to OBDlink MX+ to save some money
- ✕There are full-system scanners for smartphones starting at this price already
OBDLink MX+ 6.8 / 10
best one adapter to connect to literally hundreds of different diagnostic and coding apps/laptop software
- ✓Clean app
- ✓Fast adapter
- ✓Wide range of software to pair
- ✕Too expensive just for basic engine diagnostics - buy if you have specific software to use it with in mind
Vgate iCar pro 2s
Vgate Vlinker MS
OBDLink MX+
Why these three, and how I actually use them
Here’s the truth about ELM327 adapters that the listings won’t tell you: the chip inside barely matters. A real ELM327 chip costs around $20, so almost none of the cheap ones have it, and they still work fine. What separates a dongle that pairs first time from one that drops connection every other drive is the brand’s reputation, not the chip. That’s the whole reason I only keep recommending a handful of names. The other half of the job is the app. The dongle is just the bridge, the app does the work.
The Vgate iCar Pro 2s is where I send most people. It’s the updated version of the old iCar line, compact, low power draw, and cheap enough that there’s no reason to gamble on a no-name. It’s engine-only with no advanced functions, but that’s exactly what the ELM327 category is for. If you went in expecting coding, you bought the wrong tool, not a bad one.
→ Read full review of Vgate iCar Pro 2s
The Vgate Vlinker MS is the one I reach for when I want flexibility. It plays nicely with Android, iPhone and even Windows, which matters because iOS is fussy about Bluetooth OBD adapters and a lot of cheap dongles simply won’t pair. It’s a solid alternative to the OBDLink MX+ for less money. The one honest caveat: at this price you’re already brushing up against proper full-system smartphone scanners, so be sure a code reader is really all you want.
→ Read full review of Vgate Vlinker MS
The OBDLink MX+ is the odd one out here, and its score reflects that. As a basic engine code reader it’s overpriced, plain and simple. What you’re actually paying for is its ability to talk to hundreds of diagnostic and coding apps, including serious laptop software. So I only recommend it to one person: someone who already has a specific app or software in mind and needs an adapter they know will connect to it. Buying it just to read engine codes is burning money.
→ Read full review of OBDLink MX+
When I’d skip an ELM327 entirely: the moment you want ABS or airbag codes, active tests, coding or service resets. The ELM327 stops at the generic engine side on most cars. If that’s not enough, you’ve outgrown the category and want a full-system scanner, not a better dongle.
Is it safe to leave an ELM327 plugged in?
Not all of them. But better ELM adapters has sleep function to protect your battery. I had my OBDLink Mx+ plugged in for about 6 months straight and it never caused an issue.
Will an ELM327 read ABS, airbag or transmission codes?
Carista can do it if you pay monthly subscription but free apps like car scanner only for some cars. Standard ELM327 adapters only reach the generic engine side. Some apps unlock a few extra systems on specific brands, but if you need full ABS, airbag and module access, you've outgrown the ELM327 and want a full-system scanner.
Bluetooth, WiFi or USB ELM327?
Bluetooth for Android, it just works. WiFi if you're on an iPhone, since iOS is fussy about Bluetooth OBD adapters. USB only if you're plugging into a laptop. Pick based on the device you'll actually use, that's the only thing that matters here.
Are cheap ELM327 clones any good?
Everyone shopping for an ELM327 asks this, and it's the wrong question. A real ELM327 chip costs around $20, so almost none of the cheap ones actually have it. And that's fine, the clones still work. The thing that matters isn't whether the chip is genuine, it's whether the brand has a good reputation. Stick with names like OBDLink, Veepeak or Vgate and you'll be fine. Buy a no-name dongle off a random listing and that's where the connection drops and pairing headaches come from.
What can an ELM327 actually do?
The basics, and the basics cover most people. Read and clear engine fault codes, watch live data, log that live data, and check emissions readiness info. Some apps push further into full-system scans or even light coding, but that's where it gets shaky. Coverage on those advanced functions is often thin, brand-dependent, or locked behind a paid subscription. Treat the extras as a bonus, not the reason you buy.
What is an ELM327 adapter?
It's the cheapest way into OBD2. A small dongle that plugs into the OBD port and talks to a phone or laptop app over Bluetooth, WiFi or USB. It reads generic engine codes and live data. That's it, and for a lot of people that's all they ever need.
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