Standard Ignition NS-502 Neutral Safety Switch

Neutral Safety Switch for GM Applications

Restore proper park/neutral starting function with the Standard Ignition NS-502 neutral safety switch. This direct-fit replacement is built to OE specifications for proper fit, form, and function on select Buick, Cadillac, Oldsmobile, and Pontiac vehicles.

Designed for service professionals and repair-focused owners, the NS-502 uses copper alloy conductors for strong electrical conductivity and low resistive loss. It is a practical replacement for a damaged OE switch when the vehicle will not start in Park or Neutral, or when the transmission range signal is inconsistent.

Key Features

• Direct-fit neutral safety switch replacement
• OE-spec design for correct fit and function
• Copper alloy conductors for efficient electrical transfer
• Robust construction with aluminum and plastic finish materials
• Female connector with 1 connector interface
• 6 male blade terminals for secure electrical connection
• Black and silver housing

Detailed Description

The Standard Ignition NS-502 is a neutral safety switch engineered to replace worn or damaged original equipment units and restore the vehicle’s ability to start only in the proper transmission range. It is compatible with select 2000-2011 Buick Lucerne, Cadillac DTS, DeVille, Seville, Eldorado, Pontiac Bonneville, and Oldsmobile Aurora applications. For buyers searching for a neutral safety switch for Cadillac DTS or a replacement neutral safety switch for Buick Lucerne, this part number NS-502 is built to match OE requirements.

This part cross-references Monroe Shocks & Struts 172286 and 182286 for the same application.

What It Helps Fix

• Engine no-crank condition when the shifter is in Park or Neutral
• Intermittent starting caused by a worn transmission range switch
• Incorrect neutral safety signal to the starting circuit
• Electrical issues related to damaged OE switch contacts
• Fitment problems from a failed direct replacement switch

Installation Notes and Tips

Verify the transmission application and connector style before installation. Match the 6-blade terminal layout and female connector to the original unit, and confirm the vehicle is in the correct park/neutral starting circuit configuration. After installation, test starting operation in Park and Neutral to confirm proper switch function.

Quality Assurance

Standard Ignition builds this switch to OE specification using durable materials and copper alloy conductors to support reliable electrical performance and proper replacement fit.