Best ELM327 Bluetooth & WiFi Dongles for Phone Apps (2026)

What Is an ELM327 Dongle?

ELM327 is a microcontroller IC originally made by Elm Electronics in Canada that acts as a translator between your OBD-II port and a host computer (laptop, phone, tablet). Plug an ELM327 dongle into your car, pair it over Bluetooth or WiFi to a phone app, and the app can read and clear trouble codes, graph live sensor data, and run manufacturer-specific diagnostics. The original Elm Electronics chip is now in v2.3 (note: Elm Electronics closed in mid-2022, so genuine ELM327 chips are no longer produced -- modern adapters use compatible implementations). Most cheap dongles use unlicensed clones of older firmware (v1.5 being the most common), which work fine for basic code reading but have quirks on some protocols. A handful of premium dongles use genuine Elm chips or superior custom chipsets.

Best Overall: OBDLink MX+

The OBDLink MX+ from ScanTool.net is the premium ELM327-compatible dongle. It uses ScanTool's own proprietary chipset (faster and more reliable than generic ELM327 clones), MFi-certified Bluetooth so it pairs with iPhones, supports all OBD-II protocols including MS-CAN and SW-CAN for Ford/GM body modules, and has a proper sleep mode that draws under 2 mA when idle. FORScan users specifically recommend the MX+ because it handles the MS-CAN bus Ford needs for many body-module functions. The companion OBDLink app (iOS/Android) is clean and fast, plus it pairs with Torque, Car Scanner, FORScan, OBD Fusion, and almost any ELM327-compatible app.

Best iOS Compatible Under $50: Veepeak OBDCheck BLE

The Veepeak OBDCheck BLE is the cheapest reliable option for iPhone users. It uses Bluetooth Low Energy (BLE 4.0), which iOS supports natively, unlike the Bluetooth Classic used by most cheap dongles. It pairs with Car Scanner, OBD Fusion, Piston (iOS-native app), and Carly (subscription-based). Good build quality, reasonable chipset, and it works with both iOS and Android. Note: it does NOT work with Torque Pro on Android because Torque requires Bluetooth Classic SPP profile -- use Car Scanner instead on Android.

Best Android-Only Bluetooth Classic: BAFX Bluetooth

The BAFX Products Bluetooth OBDII Scanner has been the default cheap Bluetooth Classic dongle for over a decade. It works with Torque Lite/Pro, Car Scanner, OBD Fusion, FORScan (Android), and essentially every Android ELM327 app. The chipset is a clone v1.5 with good reliability on GM/Ford/Chrysler/Asian vehicles. It does NOT work with iPhone at all. If you have Android and want the cheapest workable dongle, this is it. Availability warning: BAFX appears to have stopped making OBD adapters (their own store lists none) -- buy only a verified listing, or choose the Veepeak/Vgate alternative.

Best Budget with Sleep Mode: Vgate iCar Pro BLE 4.0

The Vgate iCar Pro BLE 4.0 is a step up from no-name dongles. It supports both Bluetooth 4.0 (BLE) and optionally Bluetooth 3.0 depending on version, and claims a deep-sleep mode that lets you leave it plugged in without killing your battery. Works on iPhone (BLE) and Android (both modes). Build quality is better than most sub-$40 dongles, and Vgate is a known brand that also makes the vLinker line used by hardcore FORScan users.

Best for FORScan (Ford/Lincoln/Mazda): OBDLink EX or vLinker MC+

FORScan is the enthusiast go-to app for Ford, Lincoln, and Mazda diagnostics. It needs a dongle that supports MS-CAN (medium-speed CAN used by many Ford body and convenience modules), which rules out generic ELM327 clones. The best FORScan-compatible dongles are the ScanTool OBDLink EX (USB, $80) and the Vgate vLinker MC+ (Bluetooth, $50). The vLinker MC+ specifically advertises MS-CAN support and FORScan compatibility. For F-150, Mustang, Edge, Fusion, Escape owners running FORScan, this is the dongle category to buy.

Best Cheaper Bluetooth Alternative: ScanTool OBDLink LX

The ScanTool OBDLink LX is a Bluetooth-only dongle that offers similar quality to the MX+ at a lower price -- it has BatterySaver sleep mode standard, just like the MX+. There is no WiFi LX variant; if you want WiFi instead of Bluetooth (useful on older iPads or with a laptop), ScanTool's WiFi product is the separate OBDLink MX Wi-Fi. For most phone users, stick with MX+ (BT) or MX WiFi.

iPhone vs Android: The Key Compatibility Issue

iOS does not support Bluetooth Classic (SPP profile) for third-party hardware -- only BLE or MFi-certified devices. This blocks 90% of the cheap ELM327 dongles on Amazon from working with iPhones. Three ways to use OBD with iPhone: (1) a BLE dongle like the Veepeak OBDCheck BLE or Vgate iCar Pro BLE 4.0, (2) an MFi-certified Bluetooth dongle like the OBDLink MX+, or (3) a WiFi dongle like the Veepeak WiFi or OBDLink MX WiFi. Android supports both BT Classic and BLE, so Android users can use any dongle. If you buy an unspecified cheap dongle and it lists 'Bluetooth 2.0 / 3.0 / Classic' or 'works with Torque Pro,' it will NOT work with your iPhone.

App Compatibility Cheat Sheet

Torque Pro (Android only, $4.95): needs Bluetooth Classic, works with BAFX, Vgate iCar Pro (Classic version), OBDLink MX+ (in Classic mode). Does NOT work with BLE-only dongles. Car Scanner ELM OBD2 (Android + iOS, free + IAP): works with almost any dongle including BLE. Best single recommendation for cross-platform. OBD Fusion (Android + iOS, $10): works with WiFi and most Bluetooth dongles, including MFi. FORScan (Windows + Android, free; iOS app separate): needs MS-CAN support on Ford vehicles for full features -- use vLinker MC+ or OBDLink EX. BimmerCode / BimmerLink (BMW/Mini coding and diagnostics): requires specific dongles, OBDLink MX+ is officially supported. Carly (VW/BMW/Mercedes/Toyota coding, subscription): requires Carly-brand dongle, not generic ELM327. Piston (iOS, free): BLE dongles like Veepeak OBDCheck BLE.

What ELM327 Dongles Cannot Do

Any ELM327-based dongle is limited to the OBD-II emissions port and CAN bus access. They cannot reprogram modules, they cannot access manufacturer-proprietary CAN buses (except MS-CAN on a few premium dongles), they cannot run bidirectional tests on most vehicles (some apps expose a few), and they cannot code or reconfigure modules outside of specific apps like FORScan, BimmerCode, or Carly. For full bidirectional control and module programming you need a real scan tool (Autel MaxiSys, Launch X431, Snap-on, or OEM software like FordIDS, Techstream, or vcds).

Battery Drain Warning

Most ELM327 dongles stay powered the entire time they're plugged in, drawing 30-100 mA continuously. A typical car battery is 50-80 Ah, so a dongle can drain a full battery in 20-60 days of sitting. If you leave your car parked for more than 2 weeks at a time, unplug the dongle, or buy one with verified sleep mode: OBDLink MX+, Vgate iCar Pro BLE 4.0 (with sleep mode enabled in app), OBDLink EX USB. The MX+ specifically drops to <2 mA in sleep, which is negligible.

Frequently Asked Questions