1993-1998 Toyota Supra Strut Guide: Decoding Turbo, NA, and TEMS Variants
This guide covers failure symptoms, replacement costs, and how to choose the correct used OEM strut for your Turbo, Non-Turbo, or TEMS-equipped MKIV Supra.
- Compatibility is critical: You must match the strut to your Supra's Turbo, Non-Turbo, or TEMS configuration.
- A key sign of a bad strut is excessive bouncing after bumps, clunking noises, or visible fluid leaks on the strut body.
- To identify a TEMS strut, look for an electronic actuator motor and wire on the top; standard struts have only a nut.
- Always replace struts in pairs (front or rear) and perform a wheel alignment immediately after installation to prevent poor handling and tire wear.
Understanding Your Supra's Struts: More Than Just a Bouncy Ride
The struts on the fourth-generation (MKIV) Toyota Supra, chassis code JZA80, are key to its performance. Unlike a simple shock absorber, a strut is a structural part of the suspension that also affects steering geometry. When they wear out, it doesn't just make the ride uncomfortable; it compromises handling and safety. This guide will help you diagnose problems and select the correct replacement, which is especially important given the variations across the Supra lineup.
Key Variants: Turbo, Non-Turbo, and TEMS
Choosing the right strut for your 1993-1998 Supra is critical, as parts are not interchangeable between the main configurations. Using the wrong strut will negatively impact ride height, handling balance, and safety.
Turbo vs. Non-Turbo (NA)
The primary difference between struts for the Turbo (powered by the 2JZ-GTE engine) and Non-Turbo (2JZ-GE engine) models is the spring rate and damping force. The Turbo model is heavier, particularly over the front wheels, and was engineered for higher performance, requiring stiffer springs and firmer damping to manage the extra weight and power. While the struts may look physically similar, installing Non-Turbo struts on a Turbo model (or vice-versa) will result in an incorrect ride height and compromised handling characteristics.
TEMS vs. Standard Suspension
Some Supras were equipped with Toyota Electronic Modulated Suspension (TEMS). This was a factory option that allowed the driver to adjust the stiffness of the shock absorbers via a switch on the center console, typically with 'NORMAL' and 'SPORT' modes.
- TEMS Struts: These struts have a small electronic actuator motor on the top of the center piston rod, located under a cap in the strut tower. A wire will be connected to this actuator.
- Standard (Non-TEMS) Struts: These have a simple nut on the top of the piston rod with no electronic components or wires.
Pro Tip: The easiest way to check if your car has TEMS is to look for the suspension mode switch on the center console. To identify a used TEMS strut, look for the actuator motor and wiring connector on the very top of the strut assembly.
TEMS and non-TEMS struts are not interchangeable without modifying the system. Many owners choose to convert from the often expensive and hard-to-find TEMS components to a conventional aftermarket setup.
Symptoms of a Failing Supra Strut
Worn struts degrade slowly, so you may not notice the loss in performance at first. However, certain signs indicate it's time for a replacement.
| Symptom | Description |
|---|---|
| Excessive Bouncing | After hitting a bump or dip, the car continues to bounce up and down instead of settling immediately. This indicates the internal shock absorber has lost its ability to dampen spring oscillations. You can test this by pushing down hard on a corner of the car; if it bounces more than once or twice, the strut is likely worn. |
| Clunking or Knocking Noises | A clunking or rattling sound when driving over bumps or uneven pavement often points to a worn strut mount or a problem within the strut itself. This is one of the most common signs of a bad strut assembly. |
| Nose-Diving and Body Roll | If the front of the car dips excessively when you brake, or the rear squats during acceleration, your struts are failing to control the weight transfer. Similarly, excessive leaning or body roll during turns is another key indicator. |
| Visible Fluid Leaks | The shock absorber portion of the strut is filled with hydraulic oil. If you see oily, wet residue on the strut body, it means a seal has failed and the fluid has leaked out. A leaking strut has lost its damping ability and must be replaced. |
| Uneven Tire Wear | When struts are worn, the tires can bounce slightly as they roll, causing a distinctive pattern of uneven wear called "cupping" or "scalloping". If you run your hand over the tire's tread and feel a series of high and low spots, bad struts are a likely cause. |
Known Issues, TSBs, and Recalls
There are no active recalls or specific Technical Service Bulletins (TSBs) from Toyota for strut failure on the 1993-1998 Supra. Struts are considered a normal wear-and-tear item, and their lifespan is dependent on mileage, driving style, and road conditions.
Buying a Used OEM Supra Strut: A Buyer's Guide
For a classic vehicle like the MKIV Supra, a low-mileage used OEM strut can be a great value, often providing better quality and a more authentic ride than a cheap, new aftermarket part. Here’s what to look for.
Physical Inspection Checklist
- Check for Leaks: The strut body should be dry. Any sign of oil residue means the strut is blown and useless.
- Inspect the Rod: The chrome piston rod extending from the top should be smooth, straight, and free of rust, pitting, or damage. A damaged rod will quickly destroy the new seal.
- Examine the Mount: Check the rubber in the upper strut mount for cracks, separation, or deterioration. A bad mount will cause clunking noises.
- Look for Bends: Inspect the strut housing and spring perches for any signs of bending or damage from an accident.
- Spring Condition: Check the coil spring for heavy rust, cracks, or breaks. The protective coating should be mostly intact.
Verifying Compatibility
This is the most important step. You MUST get a strut that matches your car's configuration.
- Turbo or Non-Turbo? The only sure way to know is to get the part number or confirm the exact model of the donor car. Do not mix and match.
- TEMS or Standard? Look at the top of the strut. If it has a small motor with a wire coming out of it, it's a TEMS strut. If it just has a large nut, it's a standard strut.
Mileage and Age Considerations
Struts are a wear item. There is no set replacement interval, but most original struts show significant wear by 80,000 to 100,000 miles. When buying used, look for parts from a low-mileage donor vehicle (ideally under 80,000 miles). A 25-year-old strut with 150,000 miles is likely at the end of its service life, even if it isn't leaking. However, a used OEM Toyota, Bilstein, or Tokico strut with 50,000 miles will likely outperform and outlast a brand-new, budget-tier aftermarket part.
Replacement and Installation Tips
Replacing a strut assembly is a job for an experienced DIYer or a professional shop. The most dangerous part is the need to compress the coil spring if you are only replacing the shock insert and not the entire assembly.
Warning: A compressed coil spring contains an enormous amount of energy. If it is released accidentally, it can cause serious injury or death. Always use a proper, high-quality spring compressor and follow all safety procedures.
Related Parts to Replace
It is highly recommended to replace struts in pairs (both fronts or both rears) to maintain balanced handling. While the strut is removed, it is a good time to inspect and replace other related components:
- Strut Mount (Top Hat): If not part of the used assembly, or if the existing one is worn.
- Strut Bellows (Dust Boot) and Bump Stop: These protect the strut rod and prevent bottoming out. They are often deteriorated on original parts.
- Spring Insulators: Rubber pads that sit at the top and bottom of the spring to prevent noise.
- Sway Bar End Links: These are often removed for access and can be worn.
Key Torque Specs
Proper torque is critical for safety. While specs for the MKIV Supra can be hard to find, data from the similar MKIII platform and other Toyota models provide a strong guideline. Always verify with a MKIV-specific factory service manual if possible.
- Upper Strut Mount Nuts (x3): 26 ft-lbs (35 N-m)
- Lower Strut to Suspension Arm/Knuckle Bolts: 106 ft-lbs (143 N-m)
Pro Tip: Do not fully tighten the lower mounting bolts until the vehicle's full weight is back on the suspension. After installation, a full four-wheel alignment is mandatory to correct camber and toe settings and prevent premature tire wear.
Cost Comparison: New vs. Used Supra Struts
Prices can vary widely based on brand and type. This is an estimated breakdown for a single strut.
| Part Type | Estimated Cost (per strut) | Notes |
|---|---|---|
| New OEM | $400 - $600+ | Often sold as individual components (shock, spring, mount). May be difficult to source complete assemblies. |
| New Aftermarket (KYB, Bilstein) | $130 - $250 | Quality brands like KYB and Bilstein are popular upgrades. KYB AGX are adjustable. Bilstein B6 are a high-performance option. |
| Used OEM Assembly | $75 - $200 | Price depends heavily on mileage and condition. A great value if from a low-mileage car. |
| Shop Labor (per pair) | $390 - $580 | Includes replacement of both struts on one axle. Does not include the cost of an alignment. |
Frequently Asked Questions (FAQ)
Should I replace struts in pairs?
Yes, always. Replacing only one strut will create a handling imbalance, as the new strut will be much stiffer than the old one on the other side. This can be dangerous, especially during emergency maneuvers.
Can I use Turbo struts on my Non-Turbo Supra?
While they may physically bolt on, it is not recommended. The stiffer spring rates of the Turbo struts will likely raise the ride height of the lighter Non-Turbo car and create a harsh ride with unbalanced handling.
Can I convert my TEMS suspension to standard struts?
Yes, this is a common modification. You can install standard, non-electronic struts. You will need to unplug and remove the TEMS actuators from the top of the old struts. The TEMS warning light on the dash may flash, but the car will function correctly with the new passive suspension.
Do I need a wheel alignment after replacing struts?
Absolutely. Replacing the struts directly affects the suspension geometry, including the camber and toe angles. Failing to get an alignment will cause poor handling and rapid, uneven tire wear.
Technical Specifications
OEM Part Numbers: KG6799 48131-1D460 48131-1D520 48131-1D572 48131-1D612 48131-1D630 48131-1D670 48131-1D680 48131-24450 481311D612 48231-1B090 48231-1B121 48231-1B140 48231-1B180 48231-1B200
Torque Specs (verify with FSM): Upper Strut Mount Nuts: 26 ft-lbs (35 N-m). Lower Strut Mount Bolts: 106 ft-lbs (143 N-m).
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Toyota Supra:
- Understanding Your Supra's Struts: More Than Just a Bouncy Ride
- Key Variants: Turbo, Non-Turbo, and TEMS
- Turbo vs. Non-Turbo (NA)
- TEMS vs. Standard Suspension
- Symptoms of a Failing Supra Strut
- Known Issues, TSBs, and Recalls
- Buying a Used OEM Supra Strut: A Buyer's Guide
- Physical Inspection Checklist
- Verifying Compatibility
- Mileage and Age Considerations
- Replacement and Installation Tips
- Related Parts to Replace
- Key Torque Specs
- Cost Comparison: New vs. Used Supra Struts
- Frequently Asked Questions (FAQ)
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