MT Auto Parts Blog | Expert Tips for BMW enthusiasts on BMW Parts, Accessories, Engines and More

  Image: BMW X3 Series G01 ABS Pump Control Module for Sale at MT Auto Parts   The ABS warning light comes on. A few seconds later, the DSC light joins it. The car drives normally, the brakes seem fine, and you are left wondering whether this is urgent or whether it can wait until the next service. It should not wait. When the ABS light is on, the anti-lock braking system has disabled itself. The car can still brake, but in a situation where ABS would have prevented a wheel from locking up, it will not activate. On a wet or slippery road, that distinction can matter considerably. This guide explains what the fault usually means, what causes it, and what it costs to fix. What the ABS System Actually Does Anti-lock braking prevents wheel lock-up under heavy braking. When a wheel locks, the tyre slides on the road surface rather than rolling, and a sliding tyre generates significantly less braking force than a rolling one. It also removes steering control, because a locked front...

Image: BMW X3 Series Complete Brake Calliper Set for Sale at MT Auto Parts One wheel gets hot when the others do not. The car pulls slightly to one side under braking. You notice a faint burning smell after a motorway run, or a scraping noise that appears only on one corner. You might be told you need a new BMW brake calliper . Sometimes you do. But a sticking BMW brake calliper is one of those faults where the calliper itself is often not the original problem. It is what happens to the calliper when something else has been neglected. Understanding the real cause saves money and stops the fault coming back. How a Brake Calliper Works The calliper clamps the brake disc when you press the pedal. Inside it are one or more pistons, hydraulically pushed outward by brake fluid pressure when you brake, forcing the pads against the disc. When you release the pedal, the pressure drops and the pistons retract slightly, allowing the pads to release. That retraction is small and deliberate. The p...

Image: BMW 3 Series Genuine N57 Engine Air Mass Flow Sensor for sale at MT Auto Parts for £37.42 A rough idle. Poor fuel economy that has crept up over a few months. The engine hesitating under load or feeling flat when you accelerate. These are the symptoms that bring BMW owners to search for answers, and the BMW MAF sensor is one of the more common culprits that does not always trigger an obvious warning light. The mass airflow sensor is a small and relatively inexpensive component. When it is working correctly, you never think about it. When it is not, the effects run through almost every aspect of how the engine behaves. This guide covers what it does, how to identify when it is failing, and what to do about it. What the MAF Sensor Does The BMW mass airflow sensor sits in the intake pipe between the air filter and the throttle body. Every bit of air entering the engine passes through it. The sensor measures the volume and density of that air, continuously, in real time, and sends...