Standard Ignition NS-338 Neutral Safety Switch

Neutral Safety Switch for Infiniti M45 and Q45

Standard Ignition NS-338 is a 12V neutral safety switch built with a black face, plastic housing, and metal/plastic finish. It uses a 2-pin male terminal layout with a push-in attachment method and a 17.375-inch wiring harness for direct electrical connection.

Key Features

• Neutral safety switch for automatic transmission starting circuit control
• Fits 2003 INFINITI M45 and 2002 INFINITI Q45
• Standard Ignition NS-338 part number for direct reference
• 2-terminal, 2-wire design with male pins
• 12V electrical specification
• Black face color with plastic construction
• Push-in attachment method
• Wiring harness length: 17.375 in. (441.325 mm)

Detailed Description

Standard Ignition NS-338 is a neutral safety switch for select Infiniti applications, including the 2003 INFINITI M45 and 2002 INFINITI Q45. This switch helps manage the starter interlock circuit so the vehicle can be started only when the transmission is in the proper range. The NS-338 uses a 2-pin male terminal arrangement, 2 wires, and a push-in mounting style for a straightforward electrical replacement.

This part cross-references Standard Ignition NS-338 with common interchange references such as NS6831 for the same application. When replacing a neutral safety switch on an Infiniti M45 or Q45, matching the connector style, terminal count, and harness length is important for proper fitment and electrical continuity.

What It Helps Fix

• No-crank condition when the transmission is in Park or Neutral
• Starter engagement only in the wrong gear position
• Intermittent starting caused by worn switch contacts
• Transmission range signal issues related to the starter interlock circuit
• Electrical connection problems at the switch due to terminal wear

Installation Notes and Tips

Verify the original switch connector style, terminal count, and mounting method before installation. Confirm the vehicle application against the 2003 INFINITI M45 or 2002 INFINITI Q45 listing, and inspect the harness routing and terminal condition during replacement. Because this unit uses a push-in attachment method and no connector is included, the existing vehicle connection must match the switch design.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical replacement parts, and the NS-338 is built to match the listed application details for Infiniti starting circuit service.