2009–2016 Audi A4
By Ray Delgado ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Nov 6, 2026
Save $1,700 by doing it yourself! Shop cost: $2,000
Quick answer: Front Lower Control Arm Replacement on a 2009–2016 Audi A4 is rated Advanced and takes about 2-3 hours. You'll need 8 tools for this job, and parts cost about $300. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Front Lower Control Arm | 8K0407151D | $150.00 | |
| Ball Joint | 8K0407365A | $100.00 | |
| Control Arm Bushing | 8K0407181A | $50.00 | |
| Cotter pin (new) | — | — |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Park on level ground, loosen the wheel lug nuts slightly, then raise the 2009-2016 Audi A4 and support it on jack stands. Remove the wheel.
I raise the A4 safely and set the stands — never just the jack — with the rear wheels chocked. Control-arm bolts are tight and need leverage, and I want the car as solid as the lift I wish I had.
Mark cam bolts or eccentric washers if present so you can approximate alignment on reassembly. Remove the cotter pin/nut and separate the ball joint from the knuckle with a pickle fork or ball-joint separator — protect the boot on parts you are reusing.
Remove the inner control-arm bushing bolts/nuts at the subframe. Lower the arm carefully out of the vehicle. Note bolt orientation and any washers or flags that must go back the same way.
Compare ball-joint taper, bushing style, and mounting holes to the old arm. Transfer any reusable sensors, brackets, or sway-bar end-link hardware only if the new arm is not fully loaded. Inspect the ball-joint boot for damage before install.
I lay the new A4 control arm beside the old one — ball-joint taper, bushing style, all the holes. I have received an arm for the wrong chassis in the right box, and I am not pressing bushings into the wrong part.
Position the new control arm, start all bolts by hand, reconnect the ball joint, and torque fasteners to spec. Fit the cotter pin.
Reinstall the wheel, torque lug nuts in a star pattern, and lower the 2009-2016 Audi A4. Check for clunks on a short drive, then have a professional four-wheel alignment performed — control-arm work changes camber/caster.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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