Shop our range of 581 BAU15S offset-pin LED bulbs, including amber PY21W bulbs and other colour options for compatible vehicle-lighting applications.
BAU15S identifies the physical single-contact base, which has offset locating pins. Amber bulbs using this fitting are commonly identified as 581 or PY21W and are primarily used for indicators and other amber signal lights. Other BAU15S colours may be used for different compatible functions.
Choose the correct colour, output and Canbus specification for the intended position. Before ordering, check the pin arrangement and reference printed on your existing bulb or in the vehicle owner’s manual. BAU15S bulbs are not interchangeable with P21W BA15S bulbs with parallel pins.
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