Standard Ignition NS-158 Neutral Safety Switch

Neutral Safety Switch for Honda and Acura Applications

Standard Ignition NS-158 is a 12V neutral safety switch built for select Honda and Acura vehicles with automatic transmission starting circuits. It uses a 10-terminal, blade-style electrical layout with a single rectangular female connector and a bolt-mount design for direct replacement service.

Compatible With 1998-2004 Honda Odyssey, 2003-2004 Honda Pilot, 2001-2003 Acura CL, 1999-2003 Acura TL, 2001-2002 Acura MDX, and 1998-2002 Honda Accord. The NS-158 is a practical choice when diagnosing park/neutral start issues on these platforms.

Key Features

• Standard Ignition NS-158 neutral safety switch
• 12V electrical component for automatic transmission starting circuits
• 10 terminals with male blade terminals
• Single female rectangular connector
• Bolt-mount attachment method
• Metal construction with aluminum and plastic finish
• Black face color
• Wiring harness length: 17.125 in. (434.975 mm)
• Length: 6 in. (152.4 mm)

Detailed Description

The Standard Ignition NS-158 neutral safety switch helps control starter engagement by allowing the vehicle to crank only in the proper transmission range. It is built with a metal body, 10-wire layout, and a bolt-mount design that matches the electrical and mounting requirements of select Honda Accord, Odyssey, Pilot, and Acura CL, TL, and MDX applications. This part cross-references Honda OE numbers 28900P7W013 and 28900P7W023 for the same application.

Common Issues This Part Can Help Resolve

• No-crank condition when the shifter is in Park or Neutral
• Intermittent starter engagement on Honda and Acura automatic transmission vehicles
• Incorrect starter circuit signal from a worn neutral safety switch
• Transmission range-related starting faults on compatible applications
• Electrical connection problems at the switch interface

Installation Notes and Tips

• Verify connector shape, terminal count, and mounting style before installation.
• Inspect the harness and terminals for corrosion, looseness, or heat damage.
• Confirm shifter alignment and transmission range adjustment after replacement.
• Use the vehicle service procedure for proper switch positioning and electrical testing.
• Check for stored starting or range-sensor codes after installation and clear them as needed.

Quality Assurance

Standard Ignition supplies replacement electrical components for service applications, and the NS-158 is built to match the specified fitment and connector requirements for the listed Honda and Acura vehicles.