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Description

BMW E46 Rear Subframe Floor Reinforcement, Weld-in Kit

This E46 subframe floor reinforcement is a weld-in kit for the floor around the mounting points of the rear subframe of the BMW 3 Series E46, including the M3. That is exactly where the panel cracks on many E46s: a well-known weak spot of this model. With this kit you reinforce the floor before things go wrong, or you repair and reinforce it if there are already cracks.

The kit is intended for mechanics and specialists who are preparing an E46 for drifting, track use or simply a long life on the road. The parts are not flat plates, but are bent to match the pressings in the original floor, so they fit snugly.

Key benefits of the E46 subframe floor reinforcement

• Tackles the well-known weak spot: the floor around the rear subframe mounting
• Preventive or as a repair: reinforce, or repair and reinforce in one go
• Bent to the floor pressings of the E46, so no loose flat plates
• Made as large as possible, without you having to modify other parts on the floor
• 3 mm S355 steel, laser-cut and bent on CNC press brakes
• Tested on a BMW E46 M3 under the heaviest loads

Suitable for

BMW 3 Series

• BMW 3 Series E46
• BMW M3 E46

Technical specifications

• Item number: 0033
• Application: reinforcement and repair of the floor at the rear subframe mounting points
• Material: S355 steel
• Plate thickness: 3 mm
• Production: laser-cut, bent on CNC press brakes
• Shape: bent to the pressings of the E46 floor
• Installation: welded into the original floor
• Weight: 2.28 kg

Installation and delivery

The E46 subframe floor reinforcement is welded into the original floor. Because the parts follow the shape of the floor and are made as large as possible, you do not need to modify any lines, brackets or other parts on the floor. However, the subframe usually has to come out to get proper access to the floor.

Strip the panel back to bare metal and clean it thoroughly beforehand, so you get a strong weld. If there are already cracks, weld them shut first before you place the reinforcement over them. After welding, finish everything with primer, sealant and good underbody protection against rust. This is work for an experienced welder or body shop.

You will find more parts for a stiffer body in our chassis and subframe reinforcements category. If you also want to tackle the rear strut tower, take a look at our reinforcement for the rear shock absorber mount.

A cracked subframe floor is an expensive repair; reinforcing it beforehand is a few hours of welding.

Why choose this E46 subframe floor reinforcement?

On an E46 with lots of power, grip and hard clutch launches, the rear subframe pulls hard on the floor. This E46 subframe floor reinforcement is designed to absorb that without you having to modify the car any further. The strong S355 steel, the fit that follows the floor pressings and the test on an M3 make it a solid basis for any serious E46 build.

Frequently asked questions

Can I bolt this kit on?

No. The kit is intended to be welded into the original floor.

Does the kit also fit an E46 M3?

Yes. The E46 subframe floor reinforcement has even been tested on an M3 under heavy load.

Do I have to modify other parts on the floor?

No. The parts are made as large as possible, without you having to modify other parts on the floor for welding in.

My floor is already cracked. Does this still make sense?

Yes. The kit is suitable both for reinforcing and for repairing and reinforcing the floor. Weld the cracks shut first and then weld in the reinforcement.

What material is the kit made of?

The E46 subframe floor reinforcement is made of 3 mm thick S355 steel, laser-cut and bent on CNC press brakes.

Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.