{"product_id":"auxbeam-3157-led-turn-signal-bulbs-amber-canbus-built-in-dual-brightness-plug-and-play","title":"Auxbeam 3157 LED Turn Signal Bulbs Amber — CANbus Built-In, Dual-Brightness, Plug-and-Play","description":"\u003cp\u003e\u003cstrong\u003eAuxbeam B21 3157 amber LED bulbs are high-output, CANbus-compatible turn-signal lamps with built-in resistors, dual-brightness modes, and advanced cooling for long life.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese Auxbeam B21 3157 LED bulbs are engineered to replace standard 3157-style incandescent or LED bulbs in many US-standard sockets, delivering a brighter amber signal with plug-and-play installation. They combine a built-in decoding resistor, dual illumination levels for parking\/DRL and signaling, and a multi-stage thermal design so the bulbs perform reliably without extra wiring in most vehicles.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these bulbs prevent dashboard errors and hyper-flash?\u003c\/h3\u003e\n\u003cp\u003eThe B21 Series has an integrated CANBUS-compatible resistor and an updated current-control IC to reduce or eliminate error codes and abnormal flash rates in most cars. That means you usually won’t need external resistors or extra harnesses.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBuilt-in CANBUS decoding resistor to address error messages\u003c\/li\u003e\n  \u003cli\u003eUpdated IC avoids interference with digital systems\u003c\/li\u003e\n  \u003cli\u003eCompatible with roughly 99% of vehicles using US-standard 3157 sockets\u003c\/li\u003e\n  \u003cli\u003eSupport available if sensitive models still show warnings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these bulbs be noticeably brighter and more visible?\u003c\/h3\u003e\n\u003cp\u003eYes—each bulb uses an upgraded array of SMD chips that produce a strong 3500K amber light and wider 360° coverage. The result is quicker, more distinct signaling compared with many conventional LEDs and incandescent lamps.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e36 high-efficiency 3030 SMD chips per bulb for increased lumen output\u003c\/li\u003e\n  \u003cli\u003e28W power rating per bulb for stronger light penetration\u003c\/li\u003e\n  \u003cli\u003e360° illumination to eliminate dark spots and improve side visibility\u003c\/li\u003e\n  \u003cli\u003eInstant-on response for immediate signaling performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the dual-brightness feature work in daily driving?\u003c\/h3\u003e\n\u003cp\u003eThe bulb supports two brightness states: a lower output for parking lights or daytime running lights, and a brighter mode for active turn signaling. This makes the same lamp suitable for multiple functions without manual switches.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDim mode for DRL\/parking light use\u003c\/li\u003e\n  \u003cli\u003eBright mode for turn-signal flashes (amber-off-amber pattern)\u003c\/li\u003e\n  \u003cli\u003eSeamless automatic switching driven by vehicle circuits\u003c\/li\u003e\n  \u003cli\u003eNo polarity concerns; plug-and-play installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is heat and durability managed for long-term use?\u003c\/h3\u003e\n\u003cp\u003eThe B21 bulbs use a layered cooling approach and rugged materials that extend service life and protect electronics. This reduces thermal stress and helps maintain consistent output over many hours of operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e12,000 RPM silent fan plus copper cooling ring for active heat removal\u003c\/li\u003e\n  \u003cli\u003eMultiple heat sinks and aviation-grade aluminum housing\u003c\/li\u003e\n  \u003cli\u003eIP68-rated sealing against water and dust\u003c\/li\u003e\n  \u003cli\u003eEstimated long-life operation with stable current regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Auxbeam B21 3157 amber LED bulbs suit drivers who want a bright, reliable amber turn-signal upgrade without adding external resistors or complex wiring. They are ideal for passenger cars, SUVs, and many light trucks using US-standard 3157-family sockets that need clearer signaling and error-free CANBUS compatibility. Note: certain vehicles that require CK-style sockets (some Acura, Subaru, Honda, Nissan, Toyota models) are not compatible; contact Auxbeam support if you have a sensitive vehicle or need guidance on pickup\/truck applications where extra resistors may still be necessary.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these bulbs plug-and-play with my car?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes for most US-standard 3157-family sockets—no drilling or rewiring. Some sensitive models may need extra resistors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do they cause hyper-flash or error lights?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They include a built-in CANBUS resistor to prevent errors in about 99% of vehicles; contact support if you see warnings.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Auxbeam","offers":[{"title":"Default Title","offer_id":48083653066910,"sku":"B0CJFMW5RZ","price":64.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/auxbeam-b21-3157-front-packaging.jpg?v=1785835046","url":"https:\/\/northtrailauto.ca\/products\/auxbeam-3157-led-turn-signal-bulbs-amber-canbus-built-in-dual-brightness-plug-and-play","provider":"North Trail Auto","version":"1.0","type":"link"}