Description
OSRAM P21/5W (7528ULT-2BL) 380 12V 21/5W ULTRA LIFE – Up to 4x Lifetime – Twin Pack
OSRAM ULTRA LIFE P21/5W dual-filament bulbs are designed for maximum reliability and longer replacement intervals. With up to 4x the lifetime of standard bulbs, they are perfect for vehicles using combined brake/tail or rear fog/parking lights. Backed by an OSRAM 4-year guarantee, these bulbs provide long-lasting safety and performance.
- Up to 4x longer life vs. standard P21/5W bulbs
- OSRAM 4-year guarantee (manufacturer)
- Road legal – ECE category P21/5W approved
- Dual filament: 21W (brake/fog) & 5W (tail/parking)
- BA15d base (double contact, parallel pins)
- Twin blister pack (2 bulbs) – product code 7528ULT-2BL
Typical applications
- Brake + tail light combinations
- Rear fog + parking light combinations
- Other dual-function rear lights (where P21/5W is specified)
Specifications
| ECE category | P21/5W |
| Voltage | 12V |
| Nominal wattage | 21W / 5W |
| Test voltage | 13.5V |
| Luminous flux | 460 lm (21W) / 40 lm (5W) ±20% |
| Base | BA15d |
| Lifetime | B3 = 1200h / Tc = 2000h |
| Range | OSRAM ULTRA LIFE |
| Pack size | 2 bulbs – Twin Blister (2BL) |
What’s in the box
- 2 × OSRAM P21/5W ULTRA LIFE 12V 21/5W bulbs (7528ULT-2BL)
Why choose ULTRA LIFE
Dual-function bulbs are essential for rear visibility and safety. OSRAM ULTRA LIFE ensures fewer replacements and reliable light output, making them an excellent long-term choice for brake and tail light applications.
Guarantee
OSRAM 4-year guarantee on all ULTRA LIFE signal bulbs. Manufacturer guarantee terms apply.
Product video
Note: Always replace bulbs in pairs for balanced performance. Check your vehicle handbook or existing bulb to confirm P21/5W (BA15d) fitment before purchase.
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