Auxbeam B21 Series 3157 Switchback LED Bulbs Built in Resistor Error Free — Open-Box, 16% Off

CANBUS ERROR FREE: Super compatible for standard sockets rather than CK sockets. No hyper flash, no warning. With built-in CANBUS system, the 3157 dual color bulbs can alleviate decoding problems. Note: NOT fit TOYOTA TUNDRA and TOYOTA TACOMA. For super few sensitive models such as Silverado, RAM 1500/2500/3500 and Ford F150/F250/F350, extra resistors are needed or get from us

600% EXTREMELY BRIGHT: Sequencing 36Pcs Upgraded high brightness 3030SMD chips precisely around each 3157 led bulb, 28W per bulb, High Power and 600% brighter, providing 6500K White light or 3500K Amber Yellow light. Instant-on response without warm-up time. More noticeable when turning, guard your driving safety

DUAL COLOR FUNCTION: This 3157 switchback led bulb with resistor lights up cool white for parking lights or daytime running lights (DRL) but amber yellow for turn signal lights. Unlike most turn signals flashing amber-white-amber-white on the market, the Auxbeam 3157 turn signals flash amber-off-amber-off, making it easier to see from a distance

4-LAYER COOLING SYSTEM: IP68 waterproof and dustproof. The built-in stable current IC driver avoids digital or VHF radio signal interference. The latest cooling system - 12,000RPM silent fan plus Copper cooling ring plus 16Pcs heat sinks plus 6063 aviation aluminum lamp body directly doubles heat dissipation, ensuring longer lifespan up to 60,000 hours

NOT FIT CK SOCKETS: Only compatible with US standard sockets. Please refer to the CK sockets precautions on the pictures. Designed to be polarity sensitive, and if the bulbs don't light up, please flip the plug and try again. Fit socket 3157, 3157A, 3157NA, 3057, 3057A, 3457, 3457A, 4057, 4157, 4157NA, T25, etc. No drilling, no wiring, no damage, just Plug and Play

360 DEGREE FULL CLEAR BEAM: Each 3157 led bulb provides 360 degree full illumination without dark spot or shadow, ensuring comprehensive visibility and enhanced safety for your vehicle lighting needs

Upgrade your front turn signals and daytime running lights with the Auxbeam B21 Series 3157 Switchback LED Bulbs, the smart, all-in-one lighting solution engineered for performance, safety, and convenience. Dual-Color Switchback Technology These bulbs deliver two distinct functions in a single unit: crisp 6500K White illumination for parking lights and daytime running lights (DRL), seamlessly switching to a bold 3500K Amber flash for turn signal operation — giving your vehicle a sleek, modern look while maximizing road safety. CANBUS Ready — Error Free & Anti Hyper Flash Built with an integrated resistor, the B21 Series is compatible with 99% of vehicle CANBUS systems, eliminating common LED issues like "bulb out" dashboard warnings and hyperflashing — no extra decoders or wiring modifications required, just plug in and drive. 600% Brighter Than Halogen Each bulb features 36 high-grade 3030 LED chips, making your signals dramatically more visible day or night. Exceptional visibility even in fog, rain, and low-light conditions ensures other drivers can always see your signals clearly. Advanced Heat Dissipation The Intelligent Temperature Control System, combined with an aluminum textured casing and internal heat-dissipation fins, protects against overheating and excessive current for long-lasting, consistent performance. Built-in MINI fuses add an extra layer of protection for both the bulb and your vehicle's electrical system. 5-Minute Plug-and-Play Installation Designed as a direct OEM replacement, these bulbs fit standard sockets with zero modifications. Compatible sizes include: 3157, 3157A, 3057, 3057A, 3457, 3457A, 4057, 4157, 4157NA, 3056, 3456, 4156, 3047, 3155, 3357, 3454, 3757, 3357NA. Specifications Bulb Size: 3157 / B21 Series Colors: Amber (turn signal) / White (DRL/parking) Color Temperature: 3500K (Amber), 6500K (White) Wattage: 56W per pair Voltage: 12V Pack: 2 bulbs Socket Type: Standard only (not for CK sockets)