Standard Ignition NS-157 Clutch Starter Safety Switch

Clutch Starter Safety Switch for Subaru and Nissan

Standard Ignition NS-157 is a clutch starter safety switch built with a black and blue plastic finish, a female connector, and two male blade terminals. It is used in manual-transmission starting circuits to help ensure the starter engages only when the clutch pedal is in the proper position.

Compatible With Subaru BRZ, Legacy, Impreza, Outback, and Forester applications, as well as select Nissan Maxima and 240SX models, this NS-157 switch supports direct replacement needs for vehicles that require a clutch interlock switch. The Standard Ignition NS-157 part number is also useful when cross-checking OE-style replacement listings.

Key Features

• Clutch starter safety switch for manual-transmission starting systems
• Black and blue plastic housing
• Female connector with two male blade terminals
• Direct-fit style replacement for select Subaru and Nissan applications
• Standard Ignition NS-157 identification for catalog matching

Detailed Description

Standard Ignition NS-157 is a clutch starter safety switch used in vehicles that require clutch pedal input before the starter circuit is allowed to operate. It is listed for 2013-2015 Subaru BRZ, 2012-2014 Subaru Impreza, 2012-2014 Subaru Legacy, 2012-2014 Subaru Outback, 2012-2013 Subaru Forester, 1997-2002 Subaru Impreza, 1994-2000 Subaru Legacy, 1998-2007 Subaru Forester, 1999 Nissan Maxima, and 1994-1998 Nissan 240SX. For fitment-specific searches, this part number is commonly referenced as Standard Ignition NS-157 for Subaru BRZ clutch starter safety switch and Subaru Forester clutch interlock switch applications.

This part cross-references Autotecnica NI1317171 for the same application.

Common Problems This Part Can Address

• Starter does not engage when the clutch pedal is pressed
• Intermittent no-crank condition tied to the clutch switch circuit
• Vehicle starts without proper clutch pedal input
• Faulty clutch interlock signal to the starting system
• Electrical connection issues at the switch terminals

Installation Notes and Tips

Verify connector style, terminal layout, and vehicle application before installation. Confirm the switch is positioned and adjusted according to the vehicle service procedure so the clutch pedal activates the starting circuit correctly. Inspect the harness connector for corrosion, bent terminals, or heat damage before connecting the new switch.

Quality Assurance

Standard Ignition supplies electrical replacement parts for automotive starting and control circuits. NS-157 is built with a plastic finish and blade-terminal configuration to match the listed applications and support reliable electrical connection in the clutch starter safety switch circuit.