In order to reset the radio in a 1992 BMW 525i, you will need a five digit code from the manufacturer. Once you receive the code, you can check your user manual for the correct sequence to reset the radio.
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1992 BMW 325i
Turn ignition on then input 53325. Shortly after the last digit is pressed the radio will be enable
How do you reset the oil service warning light manually on a 2003 BMW 525i?
How do you manually reset the oil life monitor on a BMW 525i
You will need a compatible BMW scan tool to reset this service light from the I drive system.
Add more fluids
You need two special BMW reset tools.
You will need a compatible BMW scan tool to reset this service light from the I drive system.
The check engine light on a BMW 525i is reset by pressing the trip reset button until the engine icon appears. The Check and DC buttons are used to navigate between menus and the trip button held to actual reset the selected error.
6.1 Liters