OSRAM ORIGINAL PY21W Halogen Signal Lamps, 12 volts, 21 watts, BAU15S, Amber, 2-pack

The OSRAM ORIGINAL PY21W 12V 21W BAU15S Amber Halogen Signal Lamps, 2-Pack serve as direct replacements for vehicle turn indicators. A BAU15S bayonet base ensures straightforward mechanical and electrical integration into compatible housings. The amber light output meets regulatory standards for front and rear turn signalling. The 12 V operating voltage matches the electrical system of standard passenger vehicles. This halogen signal lamp uses a traditional filament design rather than solid-state technology. The specified colour keeps the signal clearly distinguishable from white headlight beams and red brake lights.

Each unit has a 10 mm diameter that allows the glass envelope to seat properly within the designated lamp assembly. Two bulbs are included in the package, giving drivers the exact quantity needed to replace the signal lamps on both the left and right sides of a vehicle at the same time. A typical power draw of 21 W matches the load requirements of standard flasher relays, preventing hyper-flashing. The construction eliminates the need for additional drivers or complex wiring modifications. This matched pair also serves as a practical spare for maintaining consistent signalling function over time.

• BAU15S base type: provides a single-contact bayonet lock for secure installation.
• Amber illumination: emits the required wavelength for legal turn signal use.
• 12 V DC system voltage: integrates with standard automotive 12-volt power grids without external converters.
• 10 mm glass diameter: allows the unit to fit standard PY21W indicator housings.
• 21 W power draw: pulls the specific wattage needed to maintain normal flasher relay operation.
• 2 units per box: supplies matching bulbs for a complete left and right signal replacement.