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13.5V vs 12V bulb ?

Silver_TT

By Silver_TT
in 996 TT, 996 TT S, 996 GT2

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Silver_TT Member

Silver_TT

Posted
Posted

2002 911 TT (US) Coupe

While doing some other work in my car this past weekend I noticed the bulb that becomes illuminated in the front trunk did not work. Took out the bulb (see first attachment, it's a "12866 Phillips 12V 10W K25673") and figured I would just start out by replacing it -- fair enough.

Went to Auto Zone's website, typed in my vehicle model, and it came up with the Sylvania 6411 (see second attachment). As a side note, oddly on Amazon.com it says this bulb is not compatible with my vehicle. Well I put it in and it works. After coming back upstairs I happened to notice on the packaging it says 13.5V, 10W. But when I looked on the bulb that was in the packaging it says 12V 10W.

Anyone have any insight as to why the bulb itself says it's a 12V but the packaging says 13.5V? Are these somehow equivalent?

post-72654-0-57070700-1372197217_thumb.j

post-72654-0-93393900-1372197228_thumb.j

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Silver_TT Member

Silver_TT

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Learn something new every day.........

I just spoke with Sylvania and they told me the industry standard is to test 12V bulbs up to 13.5V (because of fluctuations in auto electrical system, etc). They said this often causes confusion because the information on the packaging and the product itself is inconsistent, but that the bulb is in fact a direct replacement and compatible in the stated vehicle.

I love this car so I adopt Jim Harbaugh's motto.... "stay paranoid" ;)

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