Is the loud noise normal after starting a BMW X4?

2 Answers
MacFernando
07/25/25 12:08am
Normal. This is the specially tuned exhaust sound by BMW. The noise is louder right after startup, somewhat similar to the startup sound of a coupe with dual exhaust pipes. The sound will diminish within a dozen seconds after starting, and it does not affect the vehicle's performance, nor is it caused by engine faults or other issues. Here is more information about the BMW X4: 1. The BMW X4 is developed based on the CLAR modular chassis. 2. It is equipped with a 3.0L L6 turbocharged diesel engine, delivering a maximum power output of 240kW (326PS) and a peak torque of 680Nm, with a 0-100km/h acceleration time of 4.9s.
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DeAbel
08/10/25 3:38pm
It's quite common for my BMW X4 to make loud noises when starting, especially in the morning or during cold winter starts. The engine noise roars like it's warming up, usually settling down after about 30 seconds to a minute. This is normal—BMW's turbocharged system is designed to preheat the exhaust pipes and catalytic converter during cold starts, resulting in louder noise but without affecting driving performance. However, if the noise doesn’t subside after startup and is accompanied by strange clicking sounds or vibrations, you should be cautious—it might indicate an exhaust leak or loose engine components. Having driven this car for several years, I’ve rarely encountered such issues. Regular maintenance and professional inspections of the engine and exhaust system usually keep things running smoothly. Don’t worry about normal noises—they’re just part of the car’s character. Just keep an eye on it.
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