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Standard Ignition NS-143 Neutral Safety Switch
| Brand | Standard Ignition NS-143 |
|---|---|
| Color | Black, Silver |
| Connector Gender | Female |
| Finish | Aluminum, Plastic |
| Terminal Gender | Male |
| Terminal Type | Blade |
| Fits | Toyota and Lexus · 40 vehicles |
Bolt-mount design. Installs securely with a single rectangular connector.
Metal and plastic construction. Balances strength with a lightweight, durable build.
12V electrical switch. Built for reliable neutral safety circuit control.
Cross-references Standard Ignition NS-143, 8454020200 and JA477 for the same application. See all 5.
Neutral Safety Switch for Toyota and Lexus Applications
Standard Ignition NS-143 is a 12V neutral safety switch built for automatic transmission starting circuits. It is a bolt-mount replacement with a rectangular female connector and 9 male blade terminals, made with metal and plastic construction for direct-fit service on select Toyota and Lexus vehicles.
Compatible With 1994-2001 Toyota Camry, 1995-2004 Toyota Avalon, 1998-2003 Toyota Sienna, 1999-2003 Toyota Solara, 1996-2000 Toyota RAV4, and 1994-1998 Lexus ES300. This part cross-references JA477 and NS5819 for the same application.
Key Features
- Standard Ignition NS-143 neutral safety switch
- 12V electrical specification
- 9-terminal blade design with male terminals
- 1 rectangular female connector
- Bolt-mount attachment method
- Metal and plastic housing with black and silver finish
- Approximate length: 3.875 in. (98.425 mm)
Detailed Description
The NS-143 is a transmission-mounted neutral safety switch used in the starting and gear-position interlock circuit. It helps ensure the engine starts only in Park or Neutral and provides the electrical signal needed for proper starter operation on supported Toyota and Lexus models. Standard Ignition NS-143 is built with a bolt-mount design, a single rectangular connector, and blade-style terminals for service replacement on vehicles such as the Toyota Camry, Avalon, Sienna, Solara, and RAV4, plus Lexus ES300 applications.
What It Helps Solve
- No-crank condition when the shifter is in Park or Neutral
- Intermittent starter engagement caused by a worn switch
- Incorrect park/neutral signal to the starting circuit
- Transmission range switch electrical faults tied to the neutral safety circuit
- Starting issues after wear, corrosion, or internal switch failure
Installation Notes and Tips
Verify connector style, terminal count, and transmission application before installation. The switch mounts with bolts and does not include mounting hardware or gaskets. Confirm shifter alignment and transmission range adjustment after replacement so the starter interlock functions correctly.
Quality Assurance
Standard Ignition supplies electrical replacement parts for service applications, and the NS-143 is built to match the listed fitment and connector specifications for direct replacement use.
| Year | Make | Model | Drive Type | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2005 | Toyota | Avalon | — | — | 3.5L | V6 | N/A | To 12/04 |
| 2004 | Toyota | Avalon | — | — | 3.0L | V6 | N/A | — |
| 2003 | Toyota | Avalon | — | Automatic | — | — | N/A | — |
| 2003 | Toyota | Sienna | — | Automatic | — | — | N/A | — |
| 2003 | Toyota | Solara | — | — | 3.0L | V6 | N/A | — |
| 2002 | Toyota | Avalon | — | Automatic | — | — | N/A | — |
| 2002 | Toyota | Sienna | — | Automatic | — | — | N/A | — |
| 2002 | Toyota | Solara | — | — | 3.0L | V6 | N/A | — |
| 2001 | Toyota | Avalon | — | Automatic | — | — | N/A | — |
| 2001 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 2001 | Toyota | Sienna | — | Automatic | — | — | N/A | — |
| 2001 | Toyota | Solara | — | — | 3.0L | V6 | N/A | — |
| 2000 | Toyota | Avalon | — | Automatic | — | — | N/A | — |
| 2000 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 2000 | Toyota | RAV4 | AWD | Automatic | — | — | N/A | — |
| 2000 | Toyota | Sienna | — | Automatic | — | — | N/A | — |
| 2000 | Toyota | Solara | — | — | 3.0L | V6 | N/A | — |
| 1999 | Toyota | Avalon | — | Automatic | — | — | N/A | — |
| 1999 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 1999 | Toyota | RAV4 | AWD | Automatic | — | — | N/A | — |
| 1999 | Toyota | Sienna | — | Automatic | — | — | N/A | — |
| 1999 | Toyota | Solara | — | — | 3.0L | V6 | N/A | — |
| 1998 | Lexus | ES300 | — | Automatic | — | — | N/A | — |
| 1998 | Toyota | Avalon | — | — | 3.0L | V6 | N/A | — |
| 1998 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 1998 | Toyota | RAV4 | AWD | Automatic | — | — | N/A | — |
| 1998 | Toyota | Sienna | — | Automatic | — | — | N/A | — |
| 1997 | Lexus | ES300 | — | Automatic | — | — | N/A | — |
| 1997 | Toyota | Avalon | — | — | 3.0L | V6 | N/A | — |
| 1997 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 1997 | Toyota | RAV4 | AWD | Automatic | — | — | N/A | — |
| 1996 | Lexus | ES300 | — | — | 3.0L | V6 | N/A | — |
| 1996 | Toyota | Avalon | — | — | 3.0L | V6 | N/A | — |
| 1996 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 1996 | Toyota | RAV4 | AWD | — | — | — | N/A | — |
| 1995 | Lexus | ES300 | — | — | 3.0L | V6 | N/A | — |
| 1995 | Toyota | Avalon | — | — | 3.0L | V6 | N/A | — |
| 1995 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
| 1994 | Lexus | ES300 | — | Automatic | — | — | N/A | — |
| 1994 | Toyota | Camry | — | Automatic | 3.0L | V6 | N/A | — |
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