BMW F2X/F3X (xDrive) Front Lower Control Arms

The SPL BMW F2X/F3X Front Lower Control Arms (FLCA) provide roll center, camber, and track width adjustment for the xDrive-equipped F2X/F3X BMWs while eliminating bushing deflection resulting in sharpened steering response and driving precision.

The ability to run more negative camber greatly improves the peak lateral grip available. Adding negative camber results in the tire having an optimal contact patch as the body rolls due to cornering forces. This is especially important with better tires and a must-have for anyone looking to prevent excessive outer shoulder wear (and heating) on their tires due to a lack of camber.

The lower control arms come with a ride height sensor bracket to maintain factory ride height sensor location, regardless of length of the arm to keep those finicky BMW chassis electronics happy.

Benefits

Adjustable Camber, Roll Center, and Track Width

Eliminates Bushing Deflection

Improved Tire Life with Ideal Camber Settings

Lightweight, High-Strength Construction

Stackable 304SS Roll Center Spacers in 1/8" and 1/4" Sizes

US Made, PTFE Lined FK Rod Ends 

Materials

6061-T6 aluminum black anodized arm, clamps, and spacers

4130 CrMo electroless nickel plated double adjuster

Ti6Al4V titanium socket head cap screws

304 stainless steel roll center and knuckle spacers

5/8" 4140 CrMo stud

FK PTFE-lined spherical bearings (F1 spec, self-cleaning)

Suitable for all uses, from daily driver to race car.

Noise, Vibration, and Harshness (NVH)

The front lower control arms are a moderate contributor to NVH. Replacing the large OEM rubber bushing has substantial benefits but also comes with a small to moderate increase the amount of transmitted road noise and felt harshness on road roads. Tires, tire pressure, and speed all factor in on how much NVH is added. On smooth roads there will be no signficant change to NVH, however tramlining may become more apparent. Overall, the FLCAs are well tolerated and a highly recommended improvement for any build.

If you already have a spherical compression rod (aka tension rod) bushing or spherical tension rod the FLCAs will greatly amplify the NVH on rough roads. This is because both modifications will result in the front having no compliant bushings. However, unlike shocks and springs, it is more of a loud, harsh noise on impacts rather than a jarring force imparted to the driver. Running a high-quality shock will improve some of the NVH, as will more compliant tires either due to tire pressure or construction.

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Confirmed Applications

F2X 2-Series
2015 - 2016 BMW 228i xDrive
2017 - 2019 BMW 230i xDrive
2015 - 2016 BMW M235i xDrive
2017 - 2019 BMW M240i xDrive

F3X 3-Series
2013 - 2018 BMW 320i xDrive
2014 - 2018 BMW 328d xDrive
2013 - 2016 BMW 328i xDrive
2017 - 2019 BMW 330i xDrive
2013 - 2015 BMW 335i xDrive
2016 - 2018 BMW 340i xDrive

F3X 4-Series
2014 - 2016 BMW 428i xDrive
2017 - 2020 BMW 430i xDrive
2014 - 2016 BMW 435i xDrive
2017 - 2020 BMW 440i xDrive

Replaces OEM Part Number(s)

This is a list of known OEM part numbers. OEMs constantly make changes to part numbers due to part updates, suppliers, etc so this may not be a complete list.

31126854727 / 31126854728

Install Instructions

SPL FLCA F3X Instructions