How to Retrieve Fault Codes for a 2003 BMW 525
- 1). Locate the data link connector in the 2003 BMW 525. It is located directly above the trunk release button, behind a small panel that opens.
- 2). Insert the ignition key and turn it to the "On" position, but don't start the engine.
- 3). Plug an OBD II reader connector into the DLC and initiate the device.
- 4). Follow the reader's instructions to retrieve the fault code(s) from the service indicator computer.
- 5). Compare the fault code(s) to the ones listed on the OBD Codes: BMW OBD-II Trouble Codes page (see "Resources"). This will show the specific problem(s) with the BMW.
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