Standard Ignition US-173 Ignition Switch

Ignition Switch for Toyota MR2 and Celica

Standard Ignition US-173 is a column-mounted ignition switch built for direct replacement on select Toyota applications. It uses a bolt-on attachment method, a single rectangular female connector, and 9 male blade terminals for a factory-style electrical interface.

Key Features

• Ignition switch for column mounting
• Bolt-on attachment method for secure installation
• 1 rectangular female connector
• 9 male blade terminals
• Plastic finish in black, gray, and white
• Direct-fit replacement for select Toyota MR2 and Toyota Celica models

Detailed Description

Standard Ignition US-173 is an ignition switch designed for vehicles that use a column-mounted switch assembly with a rectangular connector layout. The plastic housing and blade-terminal design support a straightforward electrical connection, while the bolt-on mounting style helps match the original switch location and attachment pattern. This part cross-references 18-0375 and KS6425 for the same application. It is a practical replacement choice for 1991-1995 Toyota MR2 and 1990-1993 Toyota Celica models, and the US-173 part number is commonly used when searching for a replacement ignition switch for these vehicles.

What It Helps Fix

• Intermittent or failed key-start operation
• No-crank conditions caused by a worn ignition switch
• Electrical contact issues at the switch connector
• Problems with accessory, ignition, or start circuit engagement
• Wear-related failure in the steering column switch assembly

Installation Notes and Tips

Verify connector shape, terminal count, and column mounting before installation. Match the existing switch layout to the 9-terminal blade configuration and confirm vehicle application by year and model. Fits 1991-1995 Toyota MR2, N/A. Fits 1990-1993 Toyota Celica, N/A. The US-173 should be installed only after the battery is disconnected and the original switch position is documented for proper alignment.

Quality Assurance

Standard Ignition supplies replacement electrical components for automotive service applications. US-173 is built to match the listed connector and terminal configuration for the specified Toyota fitments.