As of March 2004, Honda offers to the public a factory-sanctioned “tuner package” version of the TL called the TL A-SPEC. This version features a suspension tuned by Makoto Tamamura, an indication of the TL A-SPEC’s aggressive engineering. In addition, an underbody kit, spoiler, limited edition A-SPEC steering wheel, “A-SPEC” badge on the back, and 18-inch (460 mm) wheels are standard issue on the A-SPEC package. When installed at purchase, the car’s 4 year/ 50,000 miles (80,000 km) warranty applies to the package as well. From 2004-2005 the base TL was also offered with a 6-speed manual as a no-cost option that also included Brembo brakes and performance tires at no cost.
The third generation TL was also the first car in the American market to include a 6-disc DVD-Audio system, output through an 8-speaker 225-watt system, engineered by Panasonic and tuned by Grammy-award winning Elliot Scheiner. The system also plays back regular audio CDs as well as DTS audio discs, CD-Audio, CD-Rs and CD-RWs but not MP3s. All models were also equipped with a Bluetooth HandsFree Link (HFL) system, integrated with the audio system, to allow for hands-free usage of one’s cell phone (provided the phone also supports Bluetooth and is compatible with the HFL’s hands-free profile). The driver can simply voice-dial the number and carry the entire conversation over the car’s built-in audio system; when receiving a phone call a display will show caller ID if it is supported by the phone. The driver also has the capability to transfer current calls between the car and the cell phone. There is also a phone book which can store personal phone numbers within the car’s memory. With the built-in XM Radio tuner, owners can elect to pay a monthly subscription after the complimentary 3 months subscription expires from Acura for XM radio, which provides over 100 digital channels via satellite.

