If you own an Acura TL with the factory A-Spec package or are looking to upgrade your suspension to A-Spec specs, knowing the correct part numbers is essential. The A-Spec suspension is a factory-installed or dealer-installed option that provides a sportier ride and lower stance compared to the standard TL. This article lists the OEM suspension part numbers for the Acura TL A-Spec, covering front and rear components.
Shop on Amazon
Browse the latest options and prices.
Detroit Axle - 14pc Suspension Kit for 2004 2005 2006 Acura TL, Front 2 Lower Control Arms Assembly
Why the A-Spec Suspension Matters
The A-Spec package includes specific dampers, springs, and sway bars that deliver improved handling without sacrificing daily-driver comfort. Whether you're replacing worn parts or retrofitting an A-Spec setup, using genuine OEM parts ensures proper fit and performance. Aftermarket alternatives exist, but OEM part numbers give you a direct reference for quality components.
Acura TL A-Spec Suspension Part Numbers by Component
Front Strut and Spring Assembly
The front suspension uses a MacPherson strut design. For the A-Spec, the strut assemblies have a unique damping rate and spring height. The complete front strut and spring assembly part number for most model years (2004-2008) is 51605-SEP-A51. Note that this assembly includes the strut, spring, and upper mount. For the left and right sides, they are typically the same part number but may differ if there is a left/right specific variant. Always verify with your VIN.
Rear Strut and Spring Assembly
The rear suspension uses a multi-link design with separate springs and shocks. The rear shock absorber for the A-Spec is 52610-SEP-A51 (each). The rear spring part number is 52435-SEP-A51 (left and right are identical). Some earlier years may have different numbers, so confirm using your specific year and trim.
Front Sway Bar
A-Spec models feature a thicker front sway bar for reduced body roll. The front sway bar part number is 51300-SEP-A51. This bar is 28mm in diameter compared to the standard 26mm. The bushings and links should be replaced with the bar. Bushing part number: 51350-SEP-A51 (each side). End links: 52320-SEP-A51 (front, left or right).
Rear Sway Bar
The rear sway bar on the A-Spec is also upgraded. Part number: 52300-SEP-A51 (17mm diameter). Rear bushings: 52350-SEP-A51. Rear end links: 52360-SEP-A51.
Other Suspension Components
- Upper control arm (front): 51615-SEP-A51 (each).
- Lower control arm (front): 51320-SEP-A51 (left) and 51325-SEP-A51 (right).
- Trailing arm (rear): 52420-SEP-A51 (each).
Model Year Variations
2004-2006 Acura TL A-Spec
For these model years, the suspension parts are largely the same. The numbers above are for 2004-2006. The A-Spec package was introduced in 2004 as a dealer-installed option, so some cars may have dealer-installed parts versus factory-installed. The part numbers listed are for the genuine Honda/Acura service parts.
2007-2008 Acura TL A-Spec
From 2007, the TL received a facelift, but the suspension geometry remained similar. However, part numbers may have small changes. For 2007-2008, the front strut assembly is 51605-SEP-A71 (revised valving). Rear shocks are 52610-SEP-A71. Springs: front 51401-SEP-A71, rear 52435-SEP-A71. Always cross-check with your VIN or a dealership.
2009-2014 Acura TL
The A-Spec package was discontinued after 2008 for the TL. However, some later models have similar sport suspensions. If you own a 2009+ TL and want A-Spec-like handling, consider aftermarket options from brands like Tein or Koni.
How to Verify Your Part Numbers
To ensure you order the correct parts, follow these steps:
- Find your VIN: Located on the driver’s side dashboard or door jamb.
- Check the A-Spec mark: Look for “A-Spec” badging or consult your original window sticker.
- Use an OEM parts catalog: Websites like Honda Parts Now (or any authorized Acura parts dealer) allow VIN search.
- Remove and inspect: If you have old parts, look for a stamped part number. Some numbers are on a sticker or etched into the metal.
Recommended Approach for Replacement
When replacing A-Spec suspension components, it’s best to order OEM parts directly from an Acura dealer or trusted online parts retailer (avoid generic third-party sites that may mismatch numbers). Consider replacing dampers and springs as a set to maintain balanced performance. Also replace any worn bushings and bump stops at the same time.
Final Recommendations
For a straightforward A-Spec suspension refresh or retrofit, stick to OEM part numbers listed above. They are verified to fit your TL and deliver the intended handling. If you cannot find the exact A-Spec parts, an alternative is to use Acura TL Type-S or TLX A-Spec components, but those may require modifications. Always confirm fitment with a professional mechanic.
Remember to torque all suspension bolts to factory specifications and get a wheel alignment after installation. Use the part numbers provided as a starting point, and double-check with your vehicle’s specifics before ordering.