The Audi RS5 is a high-performance grand tourer that combines luxury with genuine sports car capability. The B9 generation (2018–2023) brought a twin-turbo V6, Quattro all-wheel drive, and a sophisticated suspension system that many owners eventually want to fine-tune. Whether you're looking to replace worn components, lower the ride height for aesthetics, or sharpen lap times on track days, understanding the available B9 Audi RS5 suspension parts is key. This guide covers the essentials—from coilovers and sway bars to bushings and control arms—so you can make an informed decision.
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Detroit Axle - Front End Suspension Kit for Audi A4 A5 Quattro Allroad Q5 RS5 S4 S5, 2 Lower Rearwar
Understanding Your B9 Audi RS5 Suspension
The factory suspension on the B9 RS5 is already well-sorted. It uses a five-link front and rear setup with adaptive dampers (Audi Magnetic Ride) as standard. The available Sport suspension plus package adds dynamic steering and a sport differential. For daily driving, this system offers a compliant ride and impressive body control. However, many enthusiast owners find that upgrading specific parts can reduce understeer, improve turn-in response, or deliver a more planted feel at higher speeds. The aftermarket has responded with components ranging from simple lowering springs to fully adjustable coilover systems.
Key Suspension Components for the B9 RS5
When upgrading or replacing suspension parts, you'll encounter several categories of components. Each affects ride quality, handling, and adjustability differently.
Coilovers
Coilovers replace the entire strut assembly with a spring-over-shock unit, often offering adjustable ride height, damping, and sometimes camber plates. For the B9 RS5, popular choices include KW Variant 3, Ohlins Road & Track, and Bilstein B16 PSS10. KW V3 provides separate compression and rebound adjustment, while Ohlins uses twin-tube technology with automatic valving adjustability. Coilovers are the most comprehensive upgrade, allowing fine-tuning for street performance or track use. Expect a firmer ride, but better body control.
Lowering Springs
If you want a lower stance without replacing the entire shock, lowering springs are a budget-friendly option. Eibach Pro-Kit and H&R Sport Springs are common for the RS5. They lower the car about 0.8 to 1.2 inches and use progressive spring rates to maintain some comfort. Keep in mind that using lowering springs with the stock adaptive dampers can lead to reduced damper travel and a harsher ride over sharp bumps. They work best if you plan to eventually upgrade to dedicated coilovers later.
Sway Bars (Anti-Roll Bars)
Upgrading the sway bars reduces body roll during cornering and can dial out understeer. The B9 RS5 already has relatively thick sway bars, but aftermarket options from H&R, 034Motorsport, and Eibach are available. Typically, a thicker rear bar helps rotate the car more easily, reducing understeer. Sway bars are a relatively simple installation and can be paired with upgraded end links for full benefit. They do not affect ride height or vertical compliance.
Control Arms and Bushings
The factory rubber bushings in the control arms allow some deflection, which can dull steering response. Replacing them with polyurethane or aluminum spherical bearings (like from SuperPro, 034Motorsport, or Powerflex) improves precise wheel control. Adjustable upper control arms are particularly useful if you lower the car significantly, as they restore geometry and camber settings. For the B9 RS5, front lower and rear upper arms are common upgrades.
Other Components
- Strut Tower Braces: While the RS5 chassis is stiff, a strut brace can further reduce flex in the front towers. Look for aluminum or steel braces from Ultra Racing, Neuspeed, or OEM+. Installation is straightforward.
- Camber Plates: These mount on top of the front struts and allow fine adjustment of camber for track alignment. They are often integrated into high-end coilovers or available as separate add-ons.
- Spring Perches and Spacers: For fine-tuning ride height on coilovers, adjustable spring perches are common. Spacers (hub-centric) can improve stance but are not strictly suspension parts.
Choosing the Right Parts for Your Driving Style
Your choice of suspension parts should align with how you use the RS5. Here are three common scenarios:
Daily Driver with Occasional Spirited Driving
If the RS5 is your primary car and you value ride comfort, start with a set of high-quality lowering springs or a mild coilover kit like the Bilstein B16. Combine with a rear sway bar upgrade to reduce understeer without making the ride harsh. Keep the factory adaptive dampers if possible—some coilover kits delete the adaptive function, which triggers a warning light. Look for kits that retain OEM electronic compatibility (e.g., KW DDC Plug & Play).
Weekend Track Tool
For frequent track days, full coilovers with external reservoirs (like Ohlins TTX) offer extensive adjustability. Pair with adjustable sway bars, polyurethane bushings, and adjustable control arms. Consider upgrading to race-spec ball joints and solid spherical bearings for maximum precision. This setup will be firm on the street, so ensure it's still tolerable for the drive to the track.
Show Car or Street Performance
If you prioritize a low stance and aggressive look, choose coilovers with a good range of height adjustment (e.g., KW V3 or BC Racing BR). Use adjustable control arms to correct alignment after lowering. A strut brace and lightweight sway bars add visual appeal and function. Remember that excessive lowering can affect ride quality and scrapping over speed bumps, so set a practical ride height.
Installation Considerations
Suspension work on the B9 RS5 is not overly complex for a skilled DIYer, but it requires specific tools: spring compressors, torque wrenches, and ball joint separators. The rear suspension in particular has limited access for the upper control arm bolts. Professional installation is recommended for coilovers and any component requiring alignment. After installation, a four-wheel alignment is mandatory. Camber plates and adjustable arms allow customization, but ensure the alignment shop understands performance setups.
For parts sourcing, stick to reputable brands sold through established tuning shops or directly from manufacturers. Verify that any coilover kit is compatible with your RS5's options (e.g., presence of Audi Magnetic Ride). Some kits include electronic cancellation modules or require coding to clear warning lights.
Final Recommendation
For most B9 Audi RS5 owners seeking a balanced upgrade, the best starting point is a set of adjustable coilovers from a brand like KW or Ohlins, paired with a stiffer rear sway bar. This combination improves handling, reduces body roll, and allows you to set ride height to your preference. If budget is a concern, lowering springs from Eibach or H&R plus a rear sway bar offer a noticeable improvement without breaking the bank. For track enthusiasts, invest in full spherical bushings and adjustable control arms to maximize precision. Always prioritize quality over price—the suspension is the foundation of your RS5's performance and safety.