Dinan Front Lower Control Arm Monoball Kit Thrust Arm/Tension Strut Bushing Upgrade for BMW F22 F23 F30 F32 F33 F36 2/3/4 Series 228i 230i M235i M240i 320i 328i 330i 335i 340i 428i 430i 435i 440i (RWD Only)

Dinan Front Arm Spherical Bearing Conversion for BMW F22 F23 F30 F32 F33 F36 RWD

Give your F-Series 2 Series, 3 Series or 4 Series a front-end transformation with the Dinan front caster arm spherical bearing upgrade. By replacing the factory rubber bushes in the forward lower wishbone with precision ball joints inside CNC-machined aluminium housings, steering feels razor sharp, brake judder is tamed and confidence on fast B-roads or track days goes way up. If you are chasing a fix for steering shake under braking, a tighter on-centre feel and cleaner turn-in, this is the proven solution.

Daily drivers love the refinement. Enthusiasts love the feedback. The joints are sealed with proper rubber boots to keep out grit and moisture, delivering outstanding durability with minimal NVH. We run these on our own cars and customer builds, and the verdict is consistent - crisper response, better stability as you lean on the brakes, and a more connected front axle without unwanted noises.

Why upgrade

• Faster steering reaction and improved precision through the first part of the corner
• Reduces braking shimmy and wheel wobble often felt with tired OEM bushes
• Removes bushing flex for consistent geometry under load
• Low-noise, sealed design keeps refinement intact for road use
• Robust aluminium bodies with high quality ball joints for long service life
• Ideal for spirited road driving and occasional circuit work

What it replaces

Direct replacement for the front tension strut bushings, also known as the thrust arm bushes or forward lower control arm bushes. Swapping to a spherical bearing eliminates the squish and delay you feel from the stock rubber components.

Vehicle fitment

Rear wheel drive models only. Not compatible with xDrive all wheel drive.

• BMW 2 Series F22 F23 - 228i, 230i, M235i, M240i
• BMW 3 Series F30 - 320i, 328i, 330i, 335i, 340i
• BMW 4 Series F32 F33 F36 - 428i, 430i, 435i, 440i

Why Dinan

Dinan’s front arm bearing conversion stands out for its blend of precision and civility. The sealed, quiet-running joint delivers the accuracy of a motorsport-style spherical bearing without the racket. Expect more stability on the brakes, cleaner feedback at the wheel and repeatable performance lap after lap.

Installation and fitting

Press-fit installation and alignment are required. For expert fitting and geometry setup, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Common search terms

BMW F30 brake judder fix, F3x tension strut bearing, BMW front wishbone bush upgrade, caster arm spherical bearing, thrust arm bush replacement, F22 F23 F32 handling upgrade, BMW steering shake under braking, front arm spherical bush, BMW RWD front axle upgrade, Dinan spherical bearing kit, BMW 228i 230i 320i 328i 330i 335i 340i 428i 430i 435i 440i front bush, F30 wobble fix, F36 Gran Coupe front arm upgrade, BMW 2 Series 3 Series 4 Series wishbone bushings, F-chassis front end improvement.