What does the yellow triangle with exclamation in it mean on a 2002 325ci BMW?

The yellow triangle with an exclamation mark in it on a 2002 325ci BMW is the Check Engine Light. This light is triggered by the engine control module (ECM) when it detects a problem with the vehicle's engine or emissions control systems. When this light is illuminated, it means that the engine has detected a problem and the recommended action is to have the vehicle inspected by a qualified technician as soon as possible.

Some common causes of the Check Engine Light to come on in a 2002 325ci BMW include:

- Loose or disconnected gas cap

- Faulty oxygen sensor

- Faulty spark plugs or wires

- Faulty catalytic converter

-Faulty emissions control system component

- Faulty engine control module (ECM)

It's important to note that the Check Engine Light can be triggered for a variety of different reasons, so having it inspected by a qualified technician is the best way to diagnose and resolve the problem.