Standard Ignition NS-140 Neutral Safety Switch

Neutral Safety Switch for Nissan and Mercury Applications

Standard Ignition NS-140 is a 12V neutral safety switch built with a bolt-mount design, dual rectangular connectors, and a 9-wire harness layout. It is used in select Nissan, Infiniti, and Mercury applications where accurate transmission range signaling is required for starting and related electrical functions.

Key Features

• Part number: NS-140
• 12V electrical design
• 6 terminals with blade and pin terminal types
• 2 female rectangular connectors
• Bolt-mount attachment method
• Metal construction with aluminum and plastic finish details
• Wiring harness length: 12.25 in. (311.15 mm)
• Switch length: 5.1875 in. (131.7625 mm)

Detailed Description

Standard Ignition NS-140 is a neutral safety switch engineered for direct-fit service in select vehicles, including 1992-1998 Nissan Maxima, 1993-1998 Nissan Quest, 1993-1997 Nissan Altima with cruise control switch and 2 connectors, 1993-1998 Mercury Villager, and 1996-1998 INFINITI I30. The NS-140 uses a female connector interface, male terminals, and a rectangular connector shape to match the original electrical connection style in these applications. This part cross-references OE-style numbers such as F3XY7A247A and NS5635 for the same application.

What It Helps Address

• No-crank condition caused by a faulty neutral safety switch
• Intermittent starting issues related to transmission range signal loss
• Incorrect park/neutral input to the starting circuit
• Electrical connection problems at the switch connector
• Replacement needs on Nissan Maxima, Nissan Quest, Mercury Villager, and INFINITI I30 applications

Installation Notes and Tips

Verify connector count, terminal style, and mounting style before installation. The NS-140 is a bolt-mount switch and does not include mounting hardware or gaskets. Confirm the vehicle application and note that 1993-1997 Nissan Altima listings require the cruise control switch with 2 connectors. For best results, inspect the harness and connector terminals for corrosion or damage before installing the new switch.

Quality Assurance

Standard Ignition supplies electrical replacement parts for service applications that require accurate fitment and dependable connector matching. NS-140 is built to align with the listed vehicle applications and OE-style interchange references.