A very common topic one will encounter on NSX forums, community conversations, and personal ownership are issues with the driver and passenger window functionality. The three most common of which are slow raising speed, rocking or binding when moving the window upwards, and the window completely dropping in the door altogether. ScienceofSpeed has found the most common root causes of these issues and has developed replacement parts to keep your NSX windows functioning properly.

Slow raising speed: this is the most common symptom of three potential issues. First is lubrication, second is window misalignment, and third is a worn-out regulator motor. Lubrication and inspection of the window alignment should always be first on the list when addressing this issue. This should also be a part of your routine servicing to keep the window regulator motors from wearing out prematurely. To find info about the process and equipment needed for this, refer to the official NSX service manual of your model year. If the alignment and lubrication are good, the regulator motor may be worn out and in need of the regulators being replaced (click here for factory window regulators).

Rocking or binding: symptoms are usually caused by the failure of the regulator guide bushings. These 4 plastic pieces are designed to allow the regulator to stay on the guide track properly. When these bushings fail the regulator is unable to move the window smoothly through its intended path, which allows the window to move around uncontrollably until it reaches the upper stoppers. This extra movement will also cause excessive friction ultimately leading to a shorter motor life span. To rectify these issues ScienceofSpeed has developed a regulator guide bushing replacement set made from PTFE (Teflon); These guide bushings are more durable and contain self-lubricating properties to keep your window moving smoothly for years to come.

Window dropping: this most often occurs on early model NSX which have a window regulator retainer that does not fully encapsulate the plastic cable retainer. This results in a detachment of the cable from the window guide, meaning the regulator assembly can no longer pull the window upwards. To accompany this, a drop in billet aluminum retainer has been developed to ensure that you will not experience the symptoms of cable retainer failure again. The cable can also break from wear - especially if the regulator has been straining from friction or binding covered in the first two issues. If your cable breaks, unfortunately, the regulator must be replaced. 

ScienceofSpeed products include step-by-step instructions on how to install these products. We also offer a full-service department at our Chandler, AZ location to properly diagnose and repair the concern you are experiencing.