{"product_id":"lucas-lighting-m-3157sb-3157-switchback-led-bulbs","title":"M-3157SB Lucas Lighting 3157 Switchback White\/Amber High Output CANBUS LED Bulbs – Pair","description":"\u003ch2\u003e\n\u003cmeta charset=\"UTF-8\"\u003e \u003cspan\u003eLucas Lighting M-3157SB 3157 High Output CANBUS Switchback LED Bulbs – Pair\u003cmeta charset=\"UTF-8\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUpgrade your vehicle's front turn signals and marker lights with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLucas Lighting M-3157SB 3157 Switchback LED Bulbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Designed as a direct replacement for standard 3157-style halogen bulbs, the M-3157SB delivers a modern \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eswitchback lighting function\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with a lower-output white running\/marker mode and a high-output amber turn-signal mode.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhen the vehicle's parking or running lights are on, the bulb illuminates \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ewhite\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. When the turn signal is activated, the bulb switches to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eamber\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e to provide the appropriate turn-signal function. This gives the front of the vehicle a cleaner white appearance during normal operation while maintaining amber turn-signal output when signaling.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe M-Series design uses fewer, higher-power LED chipsets positioned as closely as possible to the original halogen bulb filaments. This helps maintain an effective light-source position within the factory housing while delivering the instant-on response and high-output performance expected from an LED upgrade.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLucas Lighting also incorporates its latest CANBUS technology into the M-Series to provide compatibility with greater than 90% of vehicles without bulb-out errors or fast-blinking issues. The M-3157SB is sold as a pair of two bulbs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e3157 Switchback LED Bulbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed for front marker and turn-signal applications\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eWhite Running\/Marker Output\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Illuminates white during normal running or marker-light operation\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAmber Turn-Signal Output\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Switches to amber when the turn signal is activated\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh-Output M-Series Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Uses fewer, higher-power LED chipsets\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOptimized LED Positioning\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – LED chipsets are positioned close to the original halogen filament location\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAdvanced CANBUS Technology\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Lucas states compatibility with greater than 90% of vehicles without bulb-out errors or fast blinking issues\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eInstant-On LED Response\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – LEDs illuminate immediately when activated\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDirect Replacement Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed to replace standard 3157-style halogen bulbs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSold as a Pair\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Includes two LED bulbs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFront Turn Signal Application\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed specifically for switchback marker\/turn-signal applications\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eWhite Running Light + Amber Turn Signal\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe main advantage of the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eM-3157SB switchback design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is its two-stage lighting function.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDuring normal operation, the bulb provides a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ewhite running or marker-light appearance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. When the turn signal is activated, the bulb changes to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eamber\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, providing the traditional turn-signal color.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis makes the M-3157SB particularly useful for vehicles where the factory front turn signal also operates as a daytime running light or parking\/marker light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe dual-output design provides a lower-output constant mode and a higher-output safety mode for functions such as turn signals.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eHigh-Output M-Series LED Technology\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLucas Lighting designed the M-Series around the importance of LED chip positioning inside the factory lighting housing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eInstead of simply adding a large number of LED chips, the M-Series uses \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efewer, higher-power LED chipsets positioned as closely as possible to the original halogen bulb filaments\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This helps optimize the position of the light source within the factory reflector or housing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe result is an LED bulb designed to provide a more appropriate light-source position while offering the benefits of LED technology, including instant-on operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eAdvanced CANBUS Compatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe M-3157SB incorporates Lucas Lighting's latest CANBUS technology.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLucas states that the M-Series is compatible with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003egreater than 90% of vehicles without causing bulb-out errors or fast-blinking issues\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This makes the M-3157SB a convenient upgrade for many modern vehicles with electronically monitored lighting systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBecause vehicle electrical systems vary, compatibility cannot be guaranteed for every application. If your vehicle still displays a bulb warning or experiences abnormal operation after installation, additional vehicle-specific troubleshooting or components may be required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e3157 Replacement \u0026amp; Cross-Reference Compatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe M-3157SB uses the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3157 bulb style\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and can replace a wide range of related bulb numbers listed by Lucas Lighting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCompatible bulb styles include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e3047, 3047K, 3047LL, 3057, 3057A, 3057ALL, 3057K, 3057KLCP, 3057KX, 3057LL, 3057ST, 3057X, 3155, 3155LL, 3157A, 3157AK, 3157K, 3157KX, 3157LL, 3157NA, 3157NAK, 3157NALL, 3157ST, 3157X, 3357, 3357A, 3357ALL, 3357K, 3357LL, 3454NA, 3457, 3457A, 3457AK, 3457ALL, 3457K, 3457NA, 3457NAK, 3757A, 3757AK, 3757ALL, 4057, 4057K, 4057LL, 4114, 4114LL, 4114K, 4157, 4157K, 4157LL, 4157NA, 4157NAK, 5702A, 5702AK\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThese cross-reference numbers are provided by Lucas Lighting; always verify the original bulb size and application before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eDesigned for Front Turn Signal Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eM-3157SB\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is specifically suited to applications where a 3157 bulb performs both a running\/marker function and a turn-signal function.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTypical applications include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eFront turn signals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFront parking lights\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFront marker lights\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDaytime running light applications where the factory bulb uses a dual-output 3157 configuration\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe switchback function is designed for the front of the vehicle, providing white illumination during normal operation and amber illumination when the turn signal is activated.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eDirect Replacement Design\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe M-3157SB is designed to replace the original 3157-style halogen bulb without requiring a completely different lighting system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore installation, confirm that your vehicle uses a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3157 or compatible dual-output bulb\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e in the intended lighting position. Similar-looking bulbs can have different bases, contacts, or electrical functions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLucas also notes that a 3157-style bulb can replace a 3156-style bulb, but a 3156 bulb cannot functionally replace a 3157 in applications other than a reverse light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eQuick Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLucas Lighting\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSeries\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eM-Series\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSKU\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eM-3157SB\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBulb Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3157 LED\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFunction\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSwitchback\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eNormal\/Marker Color\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWhite\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTurn Signal Color\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAmber\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOutput\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDual Output\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTechnology\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLED\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCANBUS\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFront Marker \/ Turn Signal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDirect Replacement\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eQuantity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 Bulbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBulb Style\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3157\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCross-Reference\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3157 and compatible bulb styles\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eWhat's Included\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003e2 × Lucas Lighting M-3157SB Switchback LED Bulbs\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eImportant Fitment Information\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore ordering, verify that your vehicle uses a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3157-style dual-output bulb\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e in the specific lighting position where you intend to install the M-3157SB.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe M-3157SB is intended for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efront marker\/turn-signal applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e where the factory bulb performs both functions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBulb fitment can vary by vehicle year, trim level and lighting position. Lucas Lighting provides a vehicle bulb finder, but recommends verifying the original bulb size because multiple bulb styles may sometimes be available for the same vehicle depending on configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAlways compare the original bulb before installation and retain the factory bulbs for reference or emergency use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eInstallation is designed to be straightforward:\u003c\/span\u003e\u003c\/p\u003e\n\u003col data-spread=\"false\" start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eTurn off the vehicle and lighting system.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove the factory 3157 bulb.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstall the Lucas M-3157SB into the factory socket.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVerify that the bulb is fully seated.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTest the running\/marker light function.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eActivate the turn signal and verify that the bulb switches from white to amber.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck the vehicle dashboard for any bulb warnings or abnormal flashing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReassemble the vehicle once proper operation has been confirmed.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor vehicles with polarity-sensitive LED sockets, verify the bulb orientation if the bulb does not illuminate after installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eFAQ\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eDoes the Lucas M-3157SB switch between white and amber?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eYes. The M-3157SB is a switchback bulb designed to illuminate \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ewhite during the normal marker\/running-light function and amber when the turn signal is activated\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat vehicles does the M-3157SB fit?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe M-3157SB fits vehicles that use a compatible \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3157-style dual-output bulb\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e in the appropriate front marker\/turn-signal position. Always verify the original bulb before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIs the M-3157SB CANBUS compatible?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eYes. Lucas Lighting incorporates CANBUS technology into the M-Series and states that the bulbs are compatible with greater than 90% of vehicles without bulb-out errors or fast-blinking issues.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWill I need load resistors with the M-3157SB?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLucas designed the M-Series CANBUS system to reduce the need for additional components such as resistors in many applications. However, vehicle electrical systems vary, so some vehicles may still require additional components or troubleshooting.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIs the M-3157SB a white LED bulb?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIt is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eswitchback LED bulb\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. It illuminates white during its normal running\/marker function and changes to amber for the turn signal.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIs the M-3157SB the same as a regular 3157 LED bulb?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNo. The M-3157SB is specifically a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eswitchback version\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e of the M-3157. Its dual-output design provides white running\/marker illumination and amber turn-signal output.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan a 3157 replace a 3156?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLucas states that a 3157 can replace a 3156, but a 3156 cannot functionally replace a 3157 except in a reverse-light application.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHow many bulbs are included?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe M-3157SB is sold as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epair and includes two bulbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"Lucas Lighting","offers":[{"title":"Default Title","offer_id":67589226791080,"sku":"M-3157SB","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9508\/7016\/files\/lucas-lighting-m-3157sb-3157-switchback-led-bulbs.png?v=1790814956","url":"https:\/\/proaudiocenter.com\/products\/lucas-lighting-m-3157sb-3157-switchback-led-bulbs","provider":"Pro Audio Center","version":"1.0","type":"link"}