Overview
The PIAA H11 Xtreme White Plus bulb, 55w 4000K, part 15211, is a white replacement bulb with an H11 base. The manufacturer fitment list names it for the 2015 Audi Q7 in Premium, Premium Plus, Prestige, TDI Premium, TDI Premium Plus and TDI Prestige trims.
The bulb lights road hazards and street signs well ahead of a normal halogen bulb, using 4000K white light. XTRA Technology pairs a proprietary gas mixture with an aerospace alloy filament, and the rating example is 55W=110W, with light output exceeding the rated power.
The bulb is clear in color, is a universal fit bulb, and is a replacement bulb type. It is built for sustained performance where vibration and moisture protection is needed, and it is DOT and SAE compliant.
Key features
- H11 base white bulb rated 55w
- 4000K white color, which PIAA links to color recognition, contrast and depth perception
- Designed to improve output of factory or aftermarket lamps
- Quartz glass body with alloy filament
- XTRA Technology for more light per rated watt
- Built for vibration and moisture protection
- Long life and DOT and SAE compliant
Vibration and moisture in use
Headlight bulbs live in a hot, vibrating environment, and the bulb’s internal construction affects how long it holds its output. Filament support, glass quality and the seal at the base all matter once a vehicle has been driven on rough roads or in wet weather. A bulb built for those conditions suits a vehicle that sees gravel tracks or heavy rain.
Whiter light looks different from halogen, and the beam color can make road edges and signs easier to pick out at night. Lens condition still matters, because yellowed or fogged plastic filters light and cancels some of the gain. Clean the lens when changing the bulb, and check the aim afterward.
Replace the bulbs in pairs so the two sides match in color and brightness. Handle the glass only by the base, and keep the connector dry when refitting. If the socket looks scorched or the connector feels loose, repair it before fitting a new bulb.
Specifications
| Brand | Piaa Lighting |
|---|---|
| Part number | 15211 |
| UPC | 72293515211 |
| Bulb designation | H11 |
| Wattage | 55w |
| Color temperature | 4000K |
| Color | Clear |
| Bulb type | Replacement Bulb |
| Fitment type | Universal fit |
| Compliance | DOT and SAE |
Vehicle fitment
The manufacturer fitment list names the 2015 Audi Q7 with these trims:
- 2015 Audi Q7 (Premium, Premium Plus, Prestige, TDI Premium, TDI Premium Plus, TDI Prestige)
Other Q7 years and Audi models fall outside that range, so check your year, model and trim before ordering.
Installation notes
Hold the bulb by its base and switch the lamp off before changing it.
What’s included
One PIAA H11 Xtreme White Plus replacement bulb.
