Rack n Pinion | 2018 Audi S5

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If you drive a 2018 Audi S5, you already know these cars are engineered different. Sharp handling, precise steering, and that aggressive Audi feel all come from the electric power steering system built into the rack and pinion setup. But even German engineering isn’t immune to wear over time.


Common Issues

Unlike older hydraulic steering systems, the 2018 S5 uses an electric steering rack, meaning fluid leaks are not common failure points. What we actually see in the shop are issues like:

  • Steering stiffness or inconsistent assist
  • Steering wheel vibration at low speeds
  • Clunking or knocking noises over bumps
  • Fault codes related to steering angle sensors
  • Intermittent loss of power steering assist
  • Internal electronic motor failure inside the rack


A lot of owners mistake suspension noise for rack failure, which is why proper diagnosis matters before throwing expensive parts at the car. 


What Needs to Be Done

The first step is a full diagnostic scan using factory-level software to check steering module faults and calibrations. From there, we inspect:

  • Inner & outer tie rods
  • Steering rack mounts
  • Front suspension components
  • Alignment specs
  • Electrical connections & voltage supply


In some cases, the rack may need recalibration. In others, replacement is the only safe solution, especially if the electric assist motor or internal sensors fail.


Pro Tip:

Lowering springs, pothole impacts, oversized wheels, and neglected alignments can put extra stress on your steering rack. If your steering feels “off,” don’t ignore it. Catching the issue early can save you thousands.


Result:

A properly functioning steering rack restores the tight, responsive handling Audi intended with smoother steering input, improved safety, and confidence behind the wheel.


Euro Auto Tech & Smog | European Specialist | 7633 El Cajon Blvd #217, La Mesa, CA 91942

August 28, 2026
Let’s talk shop. This 2014 Audi SQ5 came through the shop with what looked like a fairly routine oil leak. But once we got it on the lift and started digging deeper, we found a little surprise hiding behind the symptoms. Let’s dive in. Diagnosis On the 3.0 supercharged V6, timing chain system issues can become a serious concern as mileage adds up. Chain stretch, worn guides, tensioner problems, and related components can lead to timing faults, rattling noises, especially on cold starts, and, if ignored, potentially major engine damage. Another major issue is that the timing chain is located at the rear of the engine, which means that replacement is an intensive, labor-heavy service requiring partial or full engine removal. What Needs to Be Done When timing chain wear is confirmed, the repair needs to be approached as a complete system, not simply “replace the chain” and call it a day. Depending on what the inspection reveals, this can include timing chains, guides, tensioners, seals, and other related components. We also inspect the surrounding areas for oil leaks and signs of wear while everything is accessible. Pro Tip: If you start hearing noticeable rattling on startup, the car develops timing fault codes, or you’re seeing unexplained oil leaks, don’t wait until the check engine light comes on. By that time, you might be dealing with a bigger problem. Result: A smooth ride and a happy driver. The goal isn’t just to quiet a noise or clear a code. It’s proper diagnostics to know the root cause and a proper mechanic who knows the proper repairs. Catch us every Friday for more shop talk. And remember: Good work ain’t cheap. Cheap work ain’t good. Euro Auto Tech & Smog | European Specialist | 7633 El Cajon Blvd #217, La Mesa, CA 91942
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