034Motorsport Density Line Front Control Arm Kit (Late, M14 Ball Joints) for Audi A4, A5, S4, S5 & RS5 (2010–2017)

Built for Audi A4, A5, S4, S5, and RS5 front suspensions with M14 ball joints and 75 mm bushings, the 034Motorsport Density Line Control Arm Kit replaces all eight factory front upper and lower control arms in a single package. The factory front arms are a core part of the B8 and B8.5 suspension, and they can start wearing out as early as 40,000 miles. Wear comes sooner on cars driven hard on the street or track. As the rubber bushings break down and the ball joints develop play, alignment drifts and steering loses precision. The Density Line arms use 75 durometer rubber bushings to limit unwanted deflection, and 034Motorsport rates the result as tighter handling and sharper steering response than new factory arms. The kit is made in the United States.

This control arm kit carries a 24-month warranty.

This is the late version of the kit. 034Motorsport makes a separate early kit, 034-401-1046, for cars with M12 ball joints and 65 mm bushings. Matching the ball joint thread size and bushing size on your car is the simplest way to tell the two apart. This late kit corresponds to Audi numbers including 8K0407505B, 8K0407506B, 8K0407509B, 8K0407510B, 8K0407151F, 8K0407152F, 8K0407693AA, and 8K0407694AA, along with their P, Q, and AD variants. On a multi-link front axle, the upper and lower arms tie the steering knuckle to the body and subframe while letting the wheel move through its travel, so worn bushings at any of the eight pivots show up in handling. 034Motorsport has developed Audi and Volkswagen performance parts since Javad Shadzi founded the company in 2005, with engineering and manufacturing under one roof in Fremont, California.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-401-1045
• Product line: Density Line, late version
• For cars with M14 ball joints and 75 mm bushings
• Bushings: 75 durometer rubber
• Includes front lower forward, front lower rearward, front upper forward, and front upper rearward control arms (left and right)
• Includes M14 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

What signs point to worn front control arms?
Look for play where the arms meet the subframe or knuckle, uneven tire wear, a car that will not hold an alignment, vibration through the steering wheel at highway speed, or wandering and pulling from side to side.

Are ball joints and hardware included?
Yes. The kit includes a pair of new M14 ball joints and an installation hardware kit along with all eight arms.

PMB carries the full Density Line front arm set so the whole axle can be refreshed in one job.

Fitment & Compatibility

Check the fitment table below for the model years this kit fits. Confirm that your car uses M14 ball joints and 75 mm bushings before ordering. PMB can confirm fit from your VIN.