034Motorsport Density Line Front Control Arm Kit (Early, M12 Ball Joints) for Audi A4, A5, S4 & S5 (2008–2010)

M12 ball joints and 65 mm bushings define the early B8 front suspension, and this 034Motorsport Density Line Control Arm Kit is the version built to match them: all eight front upper and lower control arms for the early Audi A4, A5, S4, and S5. The kit swaps the factory arms for arms with 65 durometer rubber bushings and comes with a new pair of M12 ball joints. 034Motorsport engineered the arms to limit unwanted suspension deflection, which tightens handling and sharpens steering response compared with new factory arms. The factory arms can start wearing out as early as 40,000 miles, especially on cars driven hard. Once the bushings degrade and the joints develop play, alignment suffers and steering gets vague. The kit is made in the United States.

This control arm kit carries a 24-month warranty.

Choosing between early and late kits comes down to hardware on the car. This kit, also sold under 034Motorsport's earlier number 034-B8-DLCA, is for M12 ball joints and 65 mm bushings. Cars with M14 joints and 75 mm bushings take the late kit, 034-401-1045. The arms in this kit correspond to Audi numbers 8K0407151D, 8K0407152D, 8K0407693N, 8K0407694N, 8K0407505A, 8K0407506A, 8K0407509A, and 8K0407510A, and the included ball joints correspond to 8K0407689G. Each front corner uses two lower arms and two upper arms to locate the knuckle, which is why the kit replaces all eight at once. 034Motorsport, founded in 2005 by Javad Shadzi, designs and builds its Density Line parts at its Fremont, California, facility.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-401-1046 (also 034-B8-DLCA)
• Product line: Density Line, early version
• For cars with M12 ball joints and 65 mm bushings
• Bushings: 65 durometer rubber
• Includes front lower forward, front lower rearward, front upper forward, and front upper rearward control arms (left and right)
• Includes M12 ball joints (pair) and an installation hardware kit
• Complete drop-in replacement for the factory front control arms
• Made in the United States
• Warranty: 24 months

Common Questions

How do I know my arms are worn out?
Common signs are play at the subframe or knuckle joints, uneven tire wear, an alignment that will not set correctly, steering wheel vibration at highway speed, and wandering or pulling.

Does the kit come with ball joints?
Yes. A pair of new M12 ball joints and an installation hardware kit come with the eight arms.

Is 034-B8-DLCA a different part?
No. 034Motorsport uses 034-B8-DLCA as an alternate number for this same early kit.

PMB sells this early kit for owners keeping first-year B8 cars sharp on the road.

Fitment & Compatibility

Check the fitment table below for the model years this kit fits. Confirm that your car has M12 ball joints and 65 mm bushings before you order. PMB will check fit against your VIN on request.