The OSRAM ORIGINAL W21/5W is a dual-filament halogen signal lamp built to OEM quality for vehicles that use the modern W21/5W / W3x16q glass-wedge fitting. Found in a growing number of European and Asian cars produced since the 2000s, the W21/5W serves as a compact, high-performance stop/tail lamp — the 21W filament provides a bright brake-light flash while the 5W filament delivers the continuous rear position light.

OSRAM's ORIGINAL range ensures you get the same output and fitment precision as the bulb that came with your car, making this the safest and simplest choice when it's time for a replacement.

Key Features

• Dual-filament design: 21W stop / 5W tail in one compact wedge lamp
• OEM-quality replacement matching original factory specifications
• W3x16q glass-wedge base for push-fit, tool-free installation
• Smaller and lighter than traditional BAY15d equivalents — fits modern slim lamp clusters
• ECE R37 approved for road-legal use across Europe
• Wide vehicle compatibility — standard fitment on many modern European, Japanese, and Korean models

Product Benefits

• 440 lm (21W filament) / 35 lm (5W filament) — full OEM-level output
• Glass-wedge base provides a reliable friction fit with no bayonet to corrode
• Tested to OSRAM's rigorous quality standards
• Trusted by vehicle manufacturers and professional workshops worldwide
• Quick, hassle-free replacement to restore your stop/tail lighting in minutes

Technical Specifications

• Bulb Type: W21/5W
• OSRAM Part Number: 7515
• Voltage: 12 V
• Wattage: 21/5 W (dual filament)
• Luminous Flux: 440 lm (21W filament) / 35 lm (5W filament)
• Base / Cap: W3x16q (glass wedge)
• Colour: White / Clear
• Length: 47.5 mm
• Diameter: 20.0 mm
• Lifespan: ~500 h main filament / ~1600 h position filament (Tc)
• Quantity in Pack: 1
• EAN: 4052899324312

Why You'll Love It

Modern vehicles increasingly rely on the W21/5W for their stop and tail lamp functions — and when one fails, you need a replacement that matches exactly. The OSRAM ORIGINAL W21/5W delivers the precise output, fitment, and durability of the original equipment, getting your lighting back to factory spec without any guesswork or adaptation.