The OBDLink CX is built for one job above all: coding BMWs and Minis in BimmerCode from an iPhone or Android phone. It also reads and clears check-engine codes on other cars through the included OBDLink app.
Coding is not the same job as reading codes. When BimmerCode changes a setting, it reads a module's configuration, edits it and writes it back. If the Bluetooth link drops halfway through that write, the module can be left in a confused state. The OBDLink CX is designed around that risk: OBDLink promises a steady connection that avoids corrupted data and dropped packets, and says it won't brick your ECU.
That is why the BimmerCode team recommends it, and why OBDLink states it covers every vehicle, protocol and advanced feature BimmerCode supports. Some budget BLE adapters stop short there. The Veepeak OBDCheck BLE, for example, cannot code pre-2008 cars or the G and U series in BimmerCode.
Inside, the CX uses OBDLink's own STN chip rather than an ELM327 clone. STN chips speak the ELM327 command set, so the CX behaves like a familiar adapter to apps, with OBDLink's own extensions for speed and stability.
Newer BMWs are exactly the cars where adapter choice matters most. If you own an F-series, G-series or a modern Mini and plan to change more than a couple of settings, a coding-grade adapter is cheap insurance compared with a trip to the dealer. Popular changes such as folding mirrors on lock, disabling the start-stop memory or changing the seatbelt chime all involve writes to body modules. The chip question in more depth sits in what ELM327 means.
| Spec | Value |
|---|---|
| Brand | OBDLink |
| Model | CX101 |
| Chip | OBDLink STN family, ELM327 command set compatible |
| Wireless link | Bluetooth 5.1 Low Energy |
| Operating systems | iOS and Android |
| Windows | Not supported |
| Pairing | In-app, on iOS and Android |
| BimmerCode coverage | All vehicles, protocols and features BimmerCode supports |
| Included app | OBDLink app: live data, diagnostics, clear check-engine light |
| Sleep | Advanced sleep mode for leaving it plugged in |
| Protection | Over-voltage protection |
| Power | From the vehicle's OBD-II port |
| Size | 1.8 × 1.3 × 0.9 in |
| In the box | Scanner, quick start guide, warranty card, compliance insert |
The most common first-day problem with any BLE adapter is pairing it the old way. Classic Bluetooth dongles are paired in the phone's settings menu; BLE adapters like the CX are found from inside the app. OBDLink designed the CX for easy in-app pairing on both iOS and Android, so skip the settings menu entirely. If you already paired it there by mistake, forget the device in settings and start again from the app.
BimmerCode offers to back up the original coding before you change a module. Take that backup every time. If a change does not suit you, restoring the original is quick.
A few settings need the car awake and some need specific conditions, like doors closed or lights off. BimmerCode tells you when. If the app cannot see the adapter at all, the fix is usually closing the app completely, unplugging the CX for a few seconds and trying again. The first-connection walkthrough covers more connection fixes that apply to any Bluetooth adapter.
Lots of BMW owners want to leave the adapter in the port so they can open BimmerCode or check a code any time. That is a fair plan with the CX. OBDLink gives it an advanced sleep mode and over-voltage protection, and says outright that it can be left plugged in.
Sleep mode means the adapter drops into a low-power state when the car shuts down, instead of drawing current all night the way many cheap clones do. Over-voltage protection guards it against spikes from a jump start or a charging fault.
Common sense still applies. A car that sits for weeks with an ageing battery will lose charge from its own modules regardless, so a maintainer is the real fix there. The CX is not the thing that flattens it.
Leaving it in also has a practical upside for coding. Some owners make one change, drive for a day, then decide whether to keep it. With the adapter already in the port, trying a setting and reverting it takes a minute.
The CX is not locked to BMW. The OBDLink app comes with it and works on OBD-II cars in general.
What the CX does not promise is deep brand-specific diagnostics on Fords, GMs or Toyotas. OBDLink reserves its broadest OEM coverage and extra buses for the MX+. If your household has a BMW and a Ford that needs FORScan body modules, one CX will not cover both jobs. The car compatibility breakdown shows which brands need which kind of adapter.
BMW owners have more adapter choices than most, and they are not interchangeable. The things to weigh are which BimmerCode features your model needs, whether you also want Windows or other brands, and how much risk you accept during a coding write.
| Adapter | BimmerCode coverage | iPhone | Windows |
|---|---|---|---|
| OBDLink CX | Everything BimmerCode supports | Yes | No |
| OBDLink MX+ | Recommended by BimmerCode | Yes | Yes |
| Vgate vLinker BM+ | Sold for BMW and Mini BimmerCode | Yes | Yes |
| Veepeak OBDCheck BLE | 2008+ only, no G or U series | Yes | No |
The MX+ makes sense if you also run FORScan, AlfaOBD or Windows software. The vLinker BM+ is Vgate's BMW-focused adapter and adds Windows. The Veepeak covers older F-series coding on a smaller budget but stops at the newer platforms.
Remember that the adapter is a one-time purchase while BimmerCode is paid separately. Spending a little more on the hardware that BimmerCode's own team recommends protects the time you invest in the app.
Two last checks, and both take a minute. Open BimmerCode, look up your exact model and see which features it offers. Then confirm with OBDLink's troubleshooting guide that your car is covered. A wider head-to-head of the major brands is in ELM327 vs OBDLink vs Vgate.
Yes. It uses Bluetooth 5.1 Low Energy and pairs inside the app on iPhone, iPad and Android.
No. The BimmerCode app is bought separately. The OBDLink app for general diagnostics is included.
Yes for general diagnostics through the OBDLink app, such as reading and clearing check-engine codes and live data. Its focus is BMW and Mini coding.
It is not a Windows adapter, and OBDLink does not claim MS-CAN for it. For Ford FORScan work, the MX+ or a USB cable fits better.
Yes. It has an advanced sleep mode and over-voltage protection designed for leaving it in the port.