Standard Ignition LS-349 Back Up Light Switch

BMW Back Up Light Switch Replacement

Restore reverse light operation with the Standard Ignition LS-349 back up light switch. This electrical switch uses a black and silver metal-and-plastic housing with female connector ends and male blade terminals for a direct-fit style repair on a wide range of BMW applications.

Compatible With BMW M3, 328i, 335i, 550i, Z4, and other listed models, the LS-349 is built for vehicles that rely on a reliable reverse lamp signal at the transmission or related switch location.

Key Features

• Standard Ignition LS-349 back up light switch
• Black and silver finish with metal and plastic construction
• 2 female connector cavities and 2 male blade terminals
• Electrical switch for reverse light circuit operation
• Fits a broad range of BMW passenger cars and performance models

Detailed Description

The Standard Ignition LS-349 is a back up light switch used to trigger the reverse lamp circuit when the vehicle is placed in reverse. It is listed for numerous BMW applications, including BMW M3, BMW 328i, BMW 335i, BMW 550i, BMW Z4, and related 3 Series, 5 Series, 6 Series, X5, Z3, and M models across multiple years. This part cross-references 18-1674 and NS6663 for the same application.

Use the LS-349 when you need a replacement BMW reverse light switch that matches the original electrical connection style and terminal layout. The part number LS-349 is also a useful reference when searching for BMW back up light switch replacement by application.

Common Issues This Part Can Address

• Reverse lights staying off when the transmission is shifted into reverse
• Intermittent backup lamp operation
• Faulty reverse signal to the lighting circuit
• Switch wear from age, heat, or repeated shifting
• Electrical connection problems at the reverse light switch

Installation Notes and Tips

Verify connector style, terminal type, and vehicle application before installation. This switch uses a female connector interface with male blade terminals, so matching the original electrical layout is important for proper fitment. Confirm the exact BMW model year listed for your vehicle, including notes such as 1992 325i and 325is from 2/92.

After installation, test reverse lamp operation with the ignition on and the transmission in reverse. If the reverse lights still do not function, inspect the related wiring, fuse, and connector condition.

Quality Assurance

Standard Ignition supplies electrical replacement parts for service applications, and the LS-349 is cataloged for direct vehicle fitment across the listed BMW models and years. Use the part number LS-349 to confirm application matching before ordering.