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Osram Ultra Life - 7507ULT

Osram Ultra Life - 7507ULT

The Osram Ultra Life 7507ULT PY21W signal lamps are designed for exceptional longevity, offering u...

Best current price£2.22from Autodoc

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AutodocOSRAM Light Bulbs VW,AUDI,MERCEDES-BENZ 7507ULT Bulb, indicator
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eBay7507ULT Position End Outline Marker Light Bulb Rear Front Fits Abarth By Osram
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Product Information

Full details

The Osram Ultra Life 7507ULT is an ideal choice for high-mileage drivers and fleet owners who prioritize convenience and reduced maintenance frequency. These signal lamps offer up to four times the lifespan of standard halogen bulbs, providing reliable performance for up to 100,000 km of driving. While they are engineered for exceptional durability, users should note that they are designed specifically for indicator applications, and their 3200K color temperature produces a standard warm-white light rather than a modern cool-white aesthetic.

All features

Model Part Number7507ULT
BrandOsram

Extended Product Information

FAQs

Can I use these for my headlights?

No, these are specialized PY21W signal lamps designed for turn indicators, not for primary headlight illumination.

What does the BAU15s base signify?

BAU15s indicates an offset-pin base design, which prevents the bulb from being inserted incorrectly into the socket.

Do these bulbs require any vehicle modifications?

No, these are direct plug-and-play replacements for standard PY21W bulbs.

Is the light output legal for road use?

Yes, Osram Ultra Life bulbs are manufactured to meet OEM standards and are fully ECE-compliant for road use.

How do I handle the bulbs during installation?

Always hold the bulb by the metal base, or use a clean cloth to touch the glass, to prevent oil contamination.

Troubleshooting

Bulb fails to illuminate after installation

Verify that the bulb is fully seated and locked into the BAU15s socket and check the vehicle's fuse box for a blown signal circuit fuse.

Fast flashing indicator (hyper-flashing)

This is typically caused by a resistance mismatch; check that the bulb is correctly rated for your vehicle's wattage requirements and ensure the socket contacts are not corroded.

Pros and Cons

Pros

  • Significantly longer lifespan than standard indicator bulbs
  • Reduces the labor and frequency of bulb maintenance
  • Reliable OEM quality and performance consistency
  • Ideal for professional, commercial, or high-mileage use

Cons

  • Standard warm 3200K light color may not match modern LED aesthetic
  • Halogen technology requires careful handling to avoid skin oil contamination
  • Bulb base type is specific to BAU15s sockets only

Setup, Compatibility & Care

Before installation, ensure your vehicle specifically calls for a PY21W bulb with a BAU15s base. To install, access your vehicle's lighting housing, press the bulb inward, and rotate it counter-clockwise to release it. When installing the new bulb, it is highly recommended to wear clean, lint-free gloves or use a soft cloth. Natural oils from your fingertips can leave residues on the glass surface, which can cause 'hot spots' and lead to premature filament failure once the bulb heats up. Once inserted, twist the bulb clockwise until it locks firmly into place. Ensure the locking tabs on the BAU15s base align correctly with the socket grooves.

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