DIY & Maintenance

On most BMWs the cabin air filter sits behind the glove box, and swapping it takes 10 to 20 minutes with one screwdriver. Learning how to replace a cabin air filter on a BMW comes down to two things: getting the part number that matches your exact chassis, and matching the airflow arrow before you … Read more

You test an alternator with a digital multimeter by measuring battery voltage twice: once with the engine off and once with the engine running. A healthy 12 V system rests around 12.6 volts and climbs to roughly 13.8 to 14.8 volts when the engine runs, and it should stay above about 13.0 volts with the … Read more