The Complete Guide to ST205 Suspension Parts: Upgrades, Replacements, and Maintenance

The Toyota Celica GT-Four ST205 is a beloved all-wheel-drive performance car from the 1990s. Whether you own one as a weekend toy or a daily driver, the suspension is a critical system that affects handling, ride comfort, and safety. Over time, factory parts wear out, and many owners look for improvements. This guide covers the key suspension components for the ST205, what to consider when choosing replacements or upgrades, and how to get the most out of your setup.

Understanding ST205 Suspension Basics

The ST205 uses a MacPherson strut front suspension and a double-wishbone rear setup. The system includes struts, coil springs, sway bars, control arms, bushings, and various links. The factory tuning is a compromise between comfort and performance, but many aftermarket parts allow you to sharpen handling or adjust ride height.

ST205 Front Suspension Components

• Struts and Shocks: The front struts are a combined shock and spring mount. They control damping and support the vehicle weight. Common upgrades include adjustable coilovers or high-performance shocks.
• Coil Springs: Factory springs are linear rate. Aftermarket options include progressive springs or lowering springs that reduce ride height by 1–2 inches.
• Control Arms: The lower control arms connect the strut to the subframe. Worn bushings cause vague steering and alignment issues.
• Sway Bar: The front sway bar reduces body roll. Upgrading to a thicker bar improves cornering but may increase understeer if not balanced.

ST205 Rear Suspension Components

• Shocks: The rear uses separate shocks mounted to the lower control arm. Factory shocks are twin-tube; monotube upgrades offer better damping consistency.
• Coil Springs: Rear springs sit between the shock and the body. Lowering springs are popular for a more aggressive stance.
• Control Arms: The rear has upper and lower control arms, plus a lateral link. Adjustable arms allow camber and toe correction after lowering.
• Sway Bar: The rear sway bar is smaller than the front. A thicker rear bar can reduce oversteer tendencies.

OEM vs Aftermarket ST205 Suspension Parts

For restoration or original ride quality, OEM parts from Toyota are a safe choice. However, they are often discontinued or expensive. Aftermarket parts range from budget replacements to high-end racing components.

OEM Replacement Parts

• Pros: Correct fitment, predictable longevity, no hassle.
• Cons: Limited performance, higher dealer markup, often NLA (no longer available).

Aftermarket Upgrades

• Coilovers: Complete strut/spring assemblies with adjustable ride height and damping. Top brands for ST205 include KW, Bilstein, Tein, and HSD. Coilovers are ideal for track use or aggressive street driving.
• Shocks and Springs: Separate components allow mixing and matching. Koni Yellow shocks paired with Eibach Pro-Kit springs are a classic street combo.
• Bushings: Polyurethane bushings from Energy Suspension or Whiteline tighten chassis response without sacrificing too much comfort. Replace all worn rubber bushings for consistent alignment.
• Sway Bars: Whiteline and ST Suspension offer adjustable sway bars that let you tune the balance between front and rear grip.

Key Considerations When Buying ST205 Suspension Parts

Fitment Compatibility

Not all aftermarket parts labeled for ST205 fit exactly. Some coilovers for the ST205 may require modifications for the camber plates or ABS sensor brackets. Always check with the manufacturer or a specialized vendor. Also, the ST205 has different rear brakes than earlier Celicas; ensure brake line brackets are correct.

Ride Height and Daily Driving

Lowering the car too much can cause bottoming out, scraping, and poor bump travel. A drop of 1–1.5 inches is common for street use. Adjustable coilovers allow you to fine-tune height to your preference.

Damping and Spring Rates

For a street car, spring rates around 400–500 lbf/in front and 300–400 lbf/in rear work well. Higher rates (600+) are for track use and result in a harsh ride. Adjustable dampers let you soften the ride when commuting.

Alignment Settings

After suspension changes, a professional alignment is essential. The ST205 has limited factory adjustment; aftermarket camber bolts or adjustable arms may be needed to achieve desired settings. Typical street alignment: -1.5° to -2.5° camber front, -1° to -2° rear, 0 to 1/16" toe in front, 1/8" toe in rear.

Installation Tips for ST205 Suspension

• Safety First: Use jack stands and properly support the car. Suspension bolts are often torqued to high specs; use a torque wrench.
• Strut Mounts: Replace the top strut mounts when installing new struts or coilovers. Worn mounts cause noise and misalignment.
• Spring Compressor: If using separate springs and shocks, use a spring compressor for safety. Avoid impact wrenches on spring compressors.
• Brake Lines: Disconnect brake line clips from the strut before removal. After installation, bleed the brakes if you opened the hydraulic system.
• Corrosion: The ST205 is aging; spray penetrating oil on bolts a day before. Rusted bolts may snap; have spares ready.

Maintenance and Longevity

Suspension parts wear gradually. Check for signs like uneven tire wear, knocking over bumps, excessive body roll, or steering pull. Shocks typically last 50,000–80,000 miles. Bushings last longer but become cracked with age. Coilovers may need rebuilds after 30,000–50,000 miles depending on use.

• Inspect Annually: Look for leaking shocks, torn bushings, and loose bolts.
• Clean Coilovers: If you drive in salt or dirt, clean the threads and apply anti-seize to prevent seizure.
• Rebuilds: Many high-end coilovers are rebuildable. KW and Bilstein offer rebuild services. Budget ones are usually replace-only.

Final Recommendation

For the majority of ST205 owners who want improved handling without sacrificing daily comfort, a matched set of high-quality coilovers (like KW V1 or BC Racing) is the best investment. They offer height adjustability, good damping, and are bolt-on. If you're on a tighter budget, replace worn shocks with Koni Yellows and lower with Eibach Pro-Kit springs. This combo transforms the car without breaking the bank. Always upgrade bushings and sway bars in concert for balanced performance. Consult a specialist alignment shop to dial in the setup. With proper parts and maintenance, your ST205 will continue to deliver outstanding driving dynamics for years to come.