BMW E46 Strut Replacement – 1998-2006 3 Series All Models

The BMW E46 is iconic...in both, its looks, incredible ride, and handling. And although its looks may never fade, years of driving take a toll on the E46's suspension...especially the front struts. The front struts take the bulk of the abuse from rough roads, potholes, and the occasional ricochet off of the parking lot curb stop (yes..we have done it too).

The front struts on a BMW E46 are actually part of the vehicle's suspension. In contrast to the shock absorbers on the back of the car, the front struts are considered a structural component of the vehicle. But unlike the rear shocks, whose sole purpose is to keep the car from bouncing down the highway, the front struts also keep the car balanced and are an integral part of the steering and alignment.

Signs that you are ready for a strut replacement are the front end bottoms out when driving on rough roads or potholes; abnormal front tire wear (known as "cupping"), abnormal handling characteristics, and poor front end alignment.

Before ordering all of your parts and disassembling your vehicle, it is important to understand that you will need several special tools to do the job correctly. Having the correct tools will make the job go very smoothly and save you from creating a mess that you can't put back together.

The first special tool you will need is the correct strut spring compressor. There are many spring compressors on the market, but most of them will not work for this repair. The popular "hook" style tool for example WILL NOT work on this repair due to its inability to compress the spring far enough to install the new strut.

There is only one type of spring compressor tool that will work correctly on a BMW E46 strut replacement...and that's the plate (or fork) style compressor. The BMW Repair Guide recommends purchasing the Schwaben professional plate style compressor to do this repair.  For more information on this topic, please read our article BMW Strut Spring Compression Tool - The Correct Choice for the Home Mechanic.

The other special tool you will need for this repair is a strut nut socket. In order to remove and correctly reinstall the strut lock nut, you will need a special socket that has a portion of its wall removed. Having a portion of its wall removed allows for the insertion of an Allen key into the center of the lock nut, which keeps the strut shaft from spinning during disassembly. It may all sound confusing now, but please trust us on this one. There is no way to reinstall the lock nut and properly torque it to spec without the socket. And an improperly torqued lock nut on your strut can cause a lot of issues, including strut failure.

To complicate matters, original factory strut lock nuts use a 21mm socket and most aftermarket strut lock nuts use a 22mm socket. Do yourself a favor and order both sizes now, before you start the repair. You'll find them below in the part section.