Best Aftermarket Suspension Parts for 2017 Sonata: Upgrade Handling & Ride Quality

Upgrading the suspension on your 2017 Hyundai Sonata can transform its driving dynamics. Whether you want to reduce body roll during cornering, lower the stance for a sportier look, or improve ride comfort over rough roads, aftermarket suspension parts offer targeted solutions. This guide covers the main types of components available, key factors to consider when choosing, and practical recommendations to help you make an informed decision.

Why Upgrade Suspension on a 2017 Sonata?

The 2017 Sonata is a reliable midsize sedan, but its factory suspension prioritizes comfort and cost over performance. Many owners find it soft, floaty at highway speeds, or prone to excessive lean in turns. Upgrading can:

• Improve handling and cornering grip
• Reduce body roll and nose dive under braking
• Provide a more controlled ride over bumps
• Allow ride height adjustment for a custom look
• Enhance steering response and feedback

Aftermarket parts are engineered to address these weaknesses without sacrificing daily usability. The key is selecting the right components for your driving style and budget.

Types of Aftermarket Suspension Parts

Coilovers

Coilovers combine a shock absorber and spring into a single adjustable unit. They are the most popular suspension upgrade for the 2017 Sonata because they offer the widest range of adjustability. Features include:

• Height adjustability (lowering typically 1-3 inches)
• Damping adjustability (soft to firm, depending on brand)
• Spring rate options (softer for comfort, stiffer for performance)

Premium coilovers from brands like BC Racing, Megan Racing, or Tein allow you to fine-tune the setup. For daily driving, a coilover with 30-click damping adjustment and moderate spring rates (around 6-8 kg/mm front, 4-6 kg/mm rear) works well. Coilovers are best for enthusiasts who want to dial in their ideal balance of comfort and performance.

Lowering Springs

Lowering springs replace the factory coil springs with shorter, stiffer units. They lower the car about 1-1.5 inches and reduce body roll without requiring new dampers. Pros:

• Affordable compared to coilovers
• Simple installation (can reuse stock struts)
• Improved appearance and handling

Cons: Stock dampers may wear faster due to increased spring rate. Using aftermarket struts designed to work with lowering springs is recommended. Popular choices for the Sonata include Eibach Pro-Kit and H&R Sport Springs. These springs provide a 10-20% firmer ride while maintaining composure over most roads.

Struts & Shocks

Replacing the factory struts (front) and shocks (rear) with high-performance units can significantly improve ride quality. Options include:

• Gas-charged monotube (e.g., Bilstein B6, Koni Yellow): Stiffer damping, better heat dissipation, more consistent performance.
• Twin-tube (e.g., KYB Excel-G): More comfortable, similar to OEM but with improved reliability.

For aggressive handling, Bilstein B8 struts paired with lowering springs offer excellent control. For daily comfort, consider Koni Special Active (formerly FSD) which automatically adjusts damping based on road conditions.

Sway Bars

Sway bars (anti-roll bars) reduce body lean during cornering without drastically affecting straight-line comfort. The 2017 Sonata benefits from a thicker rear sway bar (22-25mm) to reduce understeer and make the car rotate more willingly. Brands like Eibach, H&R, and Whiteline offer adjustable bars that let you choose between stiffer or softer settings. Installation is straightforward and can be done without professional tools.

Control Arms and Bushings

While not strictly a suspension part, upgrading front control arms and bushings improves alignment stability and steering precision. Polyurethane bushings (e.g., from Powerflex or SuperPro) replace the factory rubber bushings that flex under load. This reduces wheel hop, improves camber control, and provides more direct steering feel. They are a good complement to other suspension mods.

Key Considerations Before Buying

Intended Use

• Daily driver with occasional spirited driving: Lowering springs with performance struts or a comfort-oriented coilover (e.g., BC Racing BR with soft damping).
• Weekend autocross or track: Adjustable coilovers with high spring rates and uprated sway bars.
• Cruising and show: A moderate drop (1.5 inches) and lightweight components that preserve ride quality.

Budget

• Under $500: Lowering springs (Eibach Pro-Kit ~ $300).
• $500–$1,000: Performance struts + stock springs (approx. $800) or budget coilovers.
• $1,000–$2,000: Entry-level coilovers (BC Racing BR ~ $1,000) or mid-range setup with struts and sway bars.
• $2,000+: Premium coilovers (Ohlins, KW) or full custom assembly.

Installation Complexity

Coilovers and struts require spring compressors, impact tools, and possibly an alignment afterward. Lowering springs are easier but still involve disassembling the strut assembly. Sway bars are the simplest. If you are not experienced with suspension work, budget $400–$800 for professional installation.

Ride Quality Trade-offs

Firmer components improve handling but can make the car feel stiff over bumps. For comfort-oriented upgrades, choose progressive-rate springs (softer at first, stiffer deep in stroke) and monotube dampers with low speed compression adjustability. Always test-drive similar setups if possible.

Top Brands for 2017 Hyundai Sonata

• Eibach: Known for progressive lowering springs that balance comfort and handling. The Pro-Kit and Sportline are popular.
• H&R: Offers springs and sway bars with a slightly more aggressive stance and tighter feel.
• Bilstein: Premium monotube shocks/struts (B6/B8) that provide excellent damping control.
• Koni: Adjustable dampers (Yellow) and special active (FSD) for smart automatic damping.
• Megan Racing: Affordable coilovers with full height and damping adjustment; good value for beginners.
• BC Racing: Market leader for entry-level coilovers; their BR type offers 30-click damping and a smooth ride when adjusted correctly.

Final Recommendation

For the majority of 2017 Sonata drivers seeking a balanced improvement, we recommend Eibach Pro-Kit lowering springs paired with Koni Special Active dampers. This combination lowers the car about 1.2 inches, reduces body roll noticeably, and maintains excellent ride comfort for daily use. Add a 22mm H&R rear sway bar to further sharpen cornering response. Total cost is around $1,000–$1,200 (parts only) and installation is straightforward.

If you want maximum adjustability for autocross or weekend fun, invest in BC Racing BR Series coilovers and a Whiteline adjustable sway bar set. This setup offers height and damping adjustments that let you tune for the track or street. For those on a tight budget, start with just lowering springs—they provide the most noticeable handling improvement per dollar.

Always have your suspension alignment performed by a professional after installation. Note that lowering can affect camber angles; adjustable camber bolts may be needed for proper alignment. With these upgrades, your 2017 Sonata will handle far better than stock while still being practical for everyday driving.