1. Introduction
The OBDLink CX is a state-of-the-art Bluetooth 5.1 BLE OBD2 adapter engineered specifically for seamless integration with Bimmercode. This device allows users to perform advanced coding, diagnostics, and monitoring on compatible BMW vehicles using an iPhone, iPad, or Android device. Designed for reliability and ease of use, OBDLink CX provides a stable connection to prevent data corruption during critical operations like ECU coding.

2. Package Contents
Verify that all items are present in your package:
- OBDLink CX adapter
- Quick Start Guide
- Warranty Card
Note: The Bimmercode application is not included with the OBDLink CX adapter. It must be purchased and downloaded separately from the Google Play Store or Apple App Store.
3. Specifications
| Feature | Specification |
|---|---|
| Special Features | Bluetooth |
| Software Update | Yes |
| Language | English |
| Software Version | OBDLINK and BIMMERCODE compatible |
| Hardware Version | Newest |
| Brand Name | OBDLink |
| Origin | Mainland China |
| Item Type | Code Readers & Scan Tools |
| Certification | CE, FCC |
| Supported Platforms | iOS, Android |
| Connection | Bluetooth 5.1 BLE |
| Operating Voltage | 12V automotive systems |
| Dimensions | 1.8 X .9 X 1.3 inches (46 x 23 x 33 mm) |
| Device Weight | .7 oz (20 g) |
| Operating Humidity | 10 to 85% (non-condensing) |
| Maximum Parameter ID (PID) Rate | 26 |
Supported OBD Protocols:
- ISO 15765 (CAN for vehicle diagnostics)
- SAE J1939 (heavy duty vehicles)
- ISO 11898 (raw CAN)
- ISO 9141 (Asian, European, Chrysler vehicles)
- ISO 14230 (Keyword Protocol 2000)
4. Setup Instructions
- Locate OBD-II Port: Identify your vehicle's OBD-II diagnostic port. This is typically located under the dashboard on the driver's side.
- Connect OBDLink CX: Plug the OBDLink CX adapter firmly into the OBD-II port. The PWR (Power) indicator light on the adapter should illuminate green, indicating it is receiving power.
- Download Applications:
- Download the Bimmercode app from the Apple App Store (for iOS) or Google Play Store (for Android).
- Download the free OBDLink app from the Apple App Store (for iOS) or Google Play Store (for Android) for additional diagnostic features.
- Pair with Device:
- Ensure Bluetooth is enabled on your iOS or Android device.
- Open the Bimmercode app or OBDLink app. The app will guide you through the pairing process. The BLE (Bluetooth Low Energy) indicator light on the adapter will flash blue during pairing and turn solid blue once connected.

5. Operating Instructions
5.1 Using with Bimmercode (for BMW Coding)
The OBDLink CX is optimized for Bimmercode, providing 100% coverage for BimmerCode vehicles and features across E, F, G, I, and R Series BMWs.
- Ensure the OBDLink CX is connected to your vehicle's OBD-II port and paired with your device.
- Open the Bimmercode app.
- Follow the in-app instructions to connect to your vehicle. The OBD (On-Board Diagnostics) indicator light on the adapter will illuminate red when communicating with the vehicle's ECU.
- Once connected, you can access various coding options for your BMW. Always review changes carefully before applying them.



5.2 Using the Free OBDLink App (for Diagnostics and Monitoring)
The free OBDLink app allows you to monitor live parameters, perform diagnostics, and clear check-engine lights.
- Ensure the OBDLink CX is connected to your vehicle's OBD-II port and paired with your device.
- Open the OBDLink app.
- The app will automatically connect to the adapter and your vehicle.
- Explore features suchs as:
- Dashboards: Customize virtual dashboards to display real-time vehicle data (e.g., speed, RPM, engine temperature, MAF).
- Diagnostics: Read and clear Diagnostic Trouble Codes (DTCs), view freeze frame data, and check emissions readiness.
- Monitors: Track various vehicle system monitors.
- Logs: Record and review vehicle data logs.

6. Maintenance
- Keep the OBDLink CX adapter clean and free from dust and moisture.
- Store the adapter in a cool, dry place when not in use.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
- Do not attempt to disassemble or modify the adapter, as this will void the warranty.
- Regularly check for firmware updates for the OBDLink CX and app updates for Bimmercode and OBDLink apps to ensure optimal performance and compatibility.
7. Troubleshooting
- Problem: Adapter does not power on (PWR light off).
Solution: Ensure the adapter is fully seated in the vehicle's OBD-II port. Check your vehicle's battery to ensure it has sufficient power. Try the adapter in another compatible vehicle if possible to rule out a vehicle-specific issue.
- Problem: Cannot pair with iOS/Android device (BLE light not solid blue).
Solution:
- Verify Bluetooth is enabled on your mobile device.
- Ensure no other apps are currently connected to the OBDLink CX.
- Restart your mobile device and the application.
- For iOS, ensure the app has Bluetooth permissions. For Android, ensure location services are enabled as required by Android for Bluetooth LE devices.
- Unplug and re-plug the OBDLink CX from the OBD-II port.
- Problem: App cannot connect to vehicle ECU (OBD light not red/flashing).
Solution:
- Ensure the vehicle's ignition is on (engine can be off, but ignition must be in the 'ON' position).
- Confirm the OBDLink CX is properly paired with your device.
- Check the vehicle's OBD-II port for any physical damage or debris.
- Try a different OBD-II app (e.g., the free OBDLink app) to see if it can establish communication.
- Problem: Data corruption or ECU bricking concern during coding.
Solution: The OBDLink CX is designed with a "Rock-Solid Connection" to minimize the risk of data corruption. Always ensure your vehicle's battery is stable and fully charged before performing any coding operations. Avoid disconnecting the adapter or turning off the ignition during a coding session. If issues persist, consult the Bimmercode app's support resources or OBDLink's official support.

8. User Tips
- Battery Voltage: Always ensure your vehicle's battery is in good condition and sufficiently charged before performing any coding or extensive diagnostic sessions to prevent interruptions.
- App Updates: Keep both the Bimmercode and OBDLink apps updated to their latest versions for the best performance, new features, and bug fixes.
- Firmware Updates: Periodically check the OBDLink website or app for any available firmware updates for your CX adapter.
- Read Documentation: Familiarize yourself with the Bimmercode app's documentation and tutorials, especially if you are new to car coding.
- Backup First: Before making significant coding changes, always utilize any backup features offered by the Bimmercode app to save your vehicle's original configuration.
9. Warranty and Support
The OBDLink CX adapter comes with a 3-year warranty, ensuring peace of mind regarding product quality and performance.
For technical support, warranty claims, or further assistance, please contact the OBDLink Official Store or visit their official website. Refer to the Quick Start Guide or Warranty Card included in your package for specific contact details.
All OBDLink products are designed in the U.S.A by OBDLink.