The Complete Guide to Finding Your ST Suspension Part Number

If you're looking to upgrade or replace your vehicle's suspension, ST Suspension is a popular choice among enthusiasts for its coilover kits and shock absorbers. But before you order, you need the correct ST suspension part number. This guide explains what those part numbers mean, how to find them, and how to ensure you get the right parts for your car or truck.

Understanding ST Suspension Part Numbers

ST Suspension (often abbreviated as ST) is a German brand known for manufacturing high-performance coilover systems and suspension components. Their part numbers follow a specific format that encodes information about the vehicle fitment, product type, and variant. Knowing how to read these numbers prevents ordering mistakes and saves time.

What the Part Number Tells You

A typical ST suspension part number looks like something this: "ST-XXXXXXXXX" or sometimes just a numeric code beginning with "ST". The digits indicate:

• Vehicle platform: The first few numbers often correspond to the vehicle make and model series. For instance, part numbers starting with "ST-50000" might fit certain BMW models.
• Product type: Some numbers differentiate between coilover kits (ST-STX, ST-XTA) and individual components like shocks or springs.
• Generation or variant: Later digits may specify left or right side, front or rear, or whether the kit is height-adjustable.

For example, the ST Suspension XTA coilover kit for a 2015-2020 Subaru WRX might carry part number ST-20200300. The "2020" could reference the model year range, and "300" the variant. Always cross-reference with official fitment charts because part numbers can change when manufacturers revise products.

How to Find the Right ST Suspension Part Number for Your Vehicle

Finding the correct part number involves a few straightforward steps. Skipping any step could lead to buying incompatible parts.

Check Your Vehicle's Existing Part Number

If you are replacing a worn ST Suspension component, look for a sticker or etched number directly on the old part. Common locations:

• On the shock absorber body (usually laser-engraved)
• On the coilover spring perch
• On the top mount or strut cap

Write down the entire number exactly, including any hyphens or letters. If the number is faded, use a flashlight to read it clearly.

Use the Official ST Suspension Catalog

ST Suspension’s official website offers a parts catalog or fitment finder. Enter your vehicle’s year, make, model, and sometimes engine variant. The system will return the applicable part numbers. This is the most reliable method.

If you cannot access the official site, many authorized distributors also list compatibility information. Look for a “garage” or “vehicle selector” tool that filters by your specs.

Cross-Reference with Technical Drawings

For older or less common vehicles, technical drawings or exploded diagrams can help. These show where each part goes and which number corresponds to it. You can find diagrams in service manuals or on forums dedicated to your car model. Be cautious—forums sometimes list outdated numbers, so verify against current ST documentation.

Common ST Suspension Part Numbers by Vehicle Model

While we cannot list every number (ST offers hundreds of products), here are some typical categories to give you an idea of the structure:

Coilover Kits

• ST-XTA: High-end with adjustable damping. Part numbers often start with ST-500 or ST-600 for popular platforms like BMW 3 Series (E46, E90) or Audi A4 (B6, B7). For example, ST-50001 fits an E46 3 Series.
• ST-STX: Entry-level coilovers, commonly found for Honda Civic, Ford Focus, and Mazda Miata. Numbers might start with ST-200 or ST-300.
• ST-X: Basic height-adjustable coilovers. Look for numbers like ST-10000 for VW Golf Mk5.

Separate Shocks and Springs

• ST Shock Absorbers: Usually designated by a longer number like ST-3456789, with digits indicating the vehicle and position (front left, front right, etc.).
• ST Springs: Spring part numbers often end with "S" (e.g., ST-12345S). They are sold individually or as sets.

Most ST part numbers for the same platform share the first few digits but vary by configuration (height range, spring rate, damping characteristics).

Tips for Ordering the Correct Part Number

• Double-check the application: Do not rely solely on a forum post. Verify on at least two sources: the official ST website and a retailer.
• Note the trim level: Suspension parts can differ between sedan, coupe, and wagon versions, even same model year.
• Check for updates: ST occasionally revises parts. A part number superseded by a newer version might have the last digit changed. If you see a different number on the ST site, the newer one is likely the correct replacement.
• Ask a specialist: If you are unsure, contact an authorized ST dealer via phone or email. Provide your VIN (Vehicle Identification Number) for accurate matching. Do not rely on live chat without verifying credentials.
• Avoid used parts without a number: If you buy a used ST suspension component with a missing part number, it is nearly impossible to confirm fitment. Only purchase used if the number is legible and you can check it beforehand.

Frequently Asked Questions

Where is the part number on an ST coilover?

Look on the main shock body near the lower mount or on the spring seat. It is usually etched clearly. On some older sets, a white label may have peeled off—if so, try to find a secondary sticker on the top mount.

Can I use a part number from an older model year on my newer car?

Only if ST lists compatibility. Do not assume. A part number for a 2010 Subaru might physically fit a 2012, but damping rates or spring lengths may be different. Always use the number specified for your exact year and trim.

What if my ST suspension part number starts with letters other than ST?

Some aftermarket parts are branded with ST but sold under a different label. Genuine ST Suspension part numbers always begin with ST. If you see “KW” or another prefix, it is a different brand (ST is actually a sister company of KW). Only the ST prefix is correct for these components.

Are interior parts included in the part number?

ST suspension part numbers cover only the physical suspension components (springs, shocks, mounts, etc.). If you need bushings or hardware, those have separate numbers. Each item in a coilover kit has its own part number as well.

Final Recommendation

To get the right ST suspension part number, always start with the official ST Suspension website and input your vehicle details. Write down the number from the site and compare it to the one on your current part (if replacing). If you are building a new setup, purchase from an authorized dealer to ensure you receive the current revision. Never guess or use numbers from unverified sources—installing the wrong part could cause unsafe handling. For most DIYers, using the web fitment tool is sufficient. For rare or custom applications, speak to a suspension specialist directly. A few minutes of verification now can save hours of return shipping and downtime later.