Standard Ignition NS-122 Neutral Safety Switch

Neutral Safety Switch for GM Applications

The Standard Ignition NS-122 neutral safety switch is built for direct replacement on a wide range of GM vehicles. It is designed with copper alloy conductors for strong electrical conductivity and low resistive loss, and each unit is fully tested for mechanical and electrical switching performance.

Compatible With Buick Century, Regal, Park Avenue, LeSabre, Riviera, and Rendezvous; Chevrolet Lumina, Lumina APV, Impala, and Monte Carlo; Oldsmobile Intrigue, Silhouette, 88, LSS, Regency, Cutlass, Cutlass Supreme, Cutlass Ciera, and 98; Pontiac Bonneville, Grand Prix, Montana, Trans Sport, and Aztek; and Cadillac Eldorado.

Key Features

• Neutral safety switch for automatic transmission starting and gear-position circuit control
• Black housing with aluminum and plastic finish materials
• 2 female connectors and 7 / 4 male terminals for the listed applications
• Copper alloy conductors for low-resistance electrical transfer
• 100% tested for mechanical and electrical switching performance
• Standard Ignition NS-122 replacement part number for service work

Detailed Description

Standard Ignition NS-122 is a neutral safety switch engineered for vehicles that require a reliable transmission-mounted or console-related switch signal, depending on the application. It serves as the electrical interlock that helps the starter circuit operate only in the proper gear range, while also supporting accurate switching performance for the vehicle’s starting and transmission-related control logic. This part cross-references 1S5231 and 53-31593 for the same application.

Use NS-122 when servicing GM models such as the 1996-2003 Buick Century, 1996-2001 Chevrolet Lumina, 1998-2002 Pontiac Grand Prix, and 2001-2002 Oldsmobile Intrigue. The part number NS-122 is also listed across multiple other Buick, Chevrolet, Oldsmobile, Pontiac, and Cadillac applications within the confirmed fitment range.

What It Helps Fix

• No-crank condition when the transmission is not correctly signaling park or neutral
• Intermittent starter engagement caused by worn internal switch contacts
• Incorrect gear-position signal to the starting circuit
• Electrical switching faults related to transmission-mounted neutral safety switch operation
• Starting issues on GM vehicles with the listed fitment

Installation Notes and Tips

• Verify the vehicle’s year, make, model, and transmission-related mounting location before installation.
• Confirm connector style and terminal count match the original part before replacement.
• Inspect the harness and terminals for corrosion, looseness, or heat damage during service.
• After installation, check starter operation in Park and Neutral and confirm proper shift interlock behavior where equipped.

Quality Assurance

Standard Ignition builds this switch with service-grade materials and validates both electrical and mechanical function before release. The NS-122 is backed by the brand’s long-standing focus on technician-oriented electrical parts and dependable replacement fitment.