Lucas Lighting M-1157SB 1157 Switchback High Output CANBUS LED Bulbs – Pair
Upgrade your factory 1157-style front marker and turn-signal bulbs with the Lucas Lighting M-1157SB Switchback High Output CANBUS LED Bulbs.
The M-1157SB is a two-mode switchback LED bulb designed for front marker and turn-signal applications. During normal operation, the bulb provides a lower-output constant-on light. When the turn signal is activated, it switches to a higher-output amber safety signal.
The M-1157SB provides two distinct operating modes from a single bulb.
Constant-On Mode:
The bulb operates at a lower white output for the vehicle's normal front marker or parking-light function.
Turn-Signal Mode:
When the turn signal is activated, the bulb switches to its higher-output amber safety mode, creating a more noticeable turn-signal indication.
This two-stage operation allows one bulb to perform both the normal marker-light and turn-signal functions without requiring separate bulbs.
The M-1157SB is specifically designed for front marker and turn-signal applications where a switchback bulb is required.
Common applications include:
Always verify your vehicle's factory bulb configuration and required lighting behavior before ordering.
Lucas Lighting designed the M-Series around the importance of proper light-source positioning inside the factory housing.
The M-1157SB uses fewer, higher-power LED chipsets positioned as closely as possible to the original halogen filament location. Maintaining a similar light-source position helps the factory reflector and lens work with the LED bulb more effectively.
This design approach makes the M-1157SB more than simply a high-output LED conversion—it is engineered with the factory housing's light pattern in mind.
LED bulbs can sometimes cause electrical compatibility problems because the vehicle's lighting system was designed around the electrical characteristics of a halogen bulb.
Potential issues can include:
The M-1157SB incorporates Lucas Lighting's newest CANBUS technology and is designed for compatibility with greater than 90% of vehicles without bulb-out errors or fast-blinking issues.
Because vehicle electrical systems vary, certain applications may still require additional components.
The M-1157SB is compatible with a broad range of 1157-style and cross-reference bulb numbers, including:
94, 1016, 1034, 1034LL, 1142, 1157, 1157ALL, 1157LL, 1157ST, 1178A, 1196, 2057, 2057A, 2057ALL, 2057LL, 2057ST, 2357A, 2357ALL, 2357LL, 2357NA, 2397, 2397LL, 3496, 3496LL, 7528, 7528L, 7528LL and BAY15D.
Cross-reference numbers indicate compatible bulb styles and do not guarantee fitment for every vehicle. Verify the original bulb number and socket configuration before ordering.
The M-1157SB is designed as a direct replacement for compatible 1157-style bulbs.
The familiar BAY15D-style dual-contact base allows the bulb to perform separate functions through the vehicle's existing wiring, just like the original dual-filament bulb.
No modification to the factory housing should be necessary when the vehicle uses a compatible 1157/BAY15D configuration.
| Specification |
Details |
| Brand |
Lucas Lighting |
| Series |
M Series |
| SKU |
M-1157SB |
| Bulb Type |
1157 |
| Base Style |
BAY15D |
| Light Type |
Switchback LED |
| Technology |
LED |
| CANBUS |
Yes |
| Output |
High Output |
| Modes |
Two-Mode |
| Constant-On Function |
Lower Output |
| Turn-Signal Function |
Higher Output |
| Primary Application |
Front Marker / Turn Signal |
| Installation |
Direct Replacement |
| Quantity |
2 Bulbs |
| LED Design |
High-Power LED Chipsets |
| Light Response |
Instant-On |
Before ordering, verify that your vehicle uses a compatible 1157 / BAY15D-style dual-contact bulb and that the factory application is designed for a switchback bulb.
The M-1157SB is intended for front marker/turn-signal applications. It should not be assumed to be interchangeable with the red M-1157R or white M-1157W versions simply because all use the M-1157 platform.
Lucas lists numerous cross-reference bulb numbers, but a cross-reference does not guarantee vehicle fitment. Confirm the original bulb number, socket configuration and required lighting function before installation.
CANBUS compatibility can also vary between vehicles. The M-1157SB is designed to minimize common LED conversion problems, but some vehicle-specific electrical systems may require additional components.
The M-1157SB is a switchback 1157 LED bulb from Lucas Lighting's M Series. It provides two operating modes for front marker and turn-signal applications.
The bulb operates at a lower white output during the vehicle's normal marker/parking-light function. When the turn signal is activated, it switches to a higher-output amber turn-signal mode.
Yes. Lucas specifically identifies the switchback version for front marker/turn-signal applications.
Yes. The M-1157SB incorporates Lucas Lighting's CANBUS technology, designed to help prevent bulb-out warnings and fast-blinking issues.
Yes. It is designed for compatible 1157-style applications using a BAY15D dual-contact base.
No. The M-1157SB is sold as a pair containing two LED bulbs.
Lucas lists compatibility with numerous bulb styles, including 1157, 1157LL, 1157ST, 2057, 2057A, 2357, 2397, 3496, 7528 and BAY15D, among others.
The M-1157SB is specifically intended for front marker/turn-signal applications. For rear brake, marker or rear turn-signal applications, use the appropriate Lucas M-Series bulb/color for that application.
The M-1157SB is the switchback version designed for front marker/turn-signal applications, while the M-1157W is the white version intended for reverse applications.
The M-1157SB is a switchback bulb for front marker/turn-signal applications. The M-1157R is the red version intended for brake, marker and rear turn-signal applications.
