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GE 27W 12.8V T7 automotive bulb with offset-pin BAY15d base

GE

GE 27W 12.8V T7 BAY15d Automotive Bulb 3497

SKU CH-2VNZ-EB36B

27W 12.8V T7 automotive bulb with BAY15d double-contact index base for precise socket alignment

  • Power rating27 W
  • Lamp baseBAY15d
  • Rated voltage12.8 V
  • 27-watt output delivers strong illumination for automotive use
  • 8-volt rating matches standard vehicle electrical systems
  • BAY15d double-contact base ensures secure, keyed installation
  • T7 tubular form factor fits designated lamp housings
  • GE part number 3497 identifies the exact replacement bulb

GE 27W 12.8V T7 BAY15d Automotive Bulb

The GE 27W 12.8V T7 bulb uses a double-contact BAY15d prefocus base designed for automotive lighting circuits. It operates at 27 watts and 12.8 volts, matching the electrical requirements of specific vehicle lamps. The indexed base ensures correct polarity when inserted into the socket.

Installation and common issues

The BAY15d base features one pin higher than the other, so the bulb only seats one way; forcing it can bend the contacts or crack the base. Align the offset pins with the socket slots before pressing down and twisting to lock. A loose fit often causes flickering or premature filament failure due to vibration.

Check your vehicle setup

Verify the original bulb carries the 3497 designation or an exact BAY15d base code before ordering. Confirm the circuit runs at 12.8 volts and the housing accepts a T7 envelope without clearance issues. Using a different wattage or base type will prevent proper seating and may damage the lamp assembly.

How it compares

Measured against everything we stock in General-Purpose & Specialty Bulbs, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 90% of the 1,791 comparable items (median $17.99).
Power rating 27 W
Lower than about 73% of the 162 comparable items (median 70 W).

Specifications

Product
Brand nameGE
Model nameT7
Power
Power rating27 W
Rated voltage12.8 V
Size & build
Lamp baseBAY15d

Questions about this item

How can I confirm the 27W 12.8V T7 bulb is operating correctly after installation?

With the vehicle ignition on, activate the relevant lamp circuit; the bulb should illuminate steadily at full brightness without flickering, indicating the 27W filament is receiving the correct 12.8V supply.

What comes in the package for the GE 3497 and what additional items are needed?

The package contains the GE 27W 12.8V T7 automotive bulb with a BAY15d double-contact index base; no extra components are required if the socket matches this base type.

Which version of the GE 3497 should I select for my vehicle?

Choose the GE 3497 when your vehicle specifies a 27W 12.8V T7 bulb with a BAY15d pre-focus double-contact bayonet base where one index pin is higher than the other.

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