Land Rover Defender 90 front side marker bulbs measure 5008 or 232 in size, while rear side marker bulbs measure 3893, with each bulb size corresponding to specific applications on the vehicle. The replacement chart covers 1994 to 1995 production years and details bulb size specifications for side marker positions.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Land Rover Defender 90 uses three distinct bulb types across its front and rear side marker positions: the 5008, 232, and 3893, all of which conform to ANSI standards applicable in the United States and Canada.
The 5008 is a single-filament bulb with a BA15s bayonet base, operating at 12V. It is described as a lower wattage variant of the 1156 bulb, meaning it shares the same base type as the 1156 but draws less power.
The 232 is a festoon bulb with an SV8.5 base, rated at 12V and 3W. Festoon bulbs are cylindrical in form and seat by contact pressure at each end rather than by a base socket, which distinguishes them physically from bayonet-type bulbs.
The 3893 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V and designated for specialty applications. The BAY15d base features offset locating pins, which prevent incorrect insertion and distinguish it from the single-filament BA15s base used by the 5008.
The front side marker position on the Defender 90 changed bulb types between 1994 and 1995, moving from the 232 festoon bulb to the 5008 bayonet bulb. These two bulbs use fundamentally different base types and are not interchangeable.
The rear side marker position on the Defender 90 uses the 3893 for both 1994 and 1995, making it the only position with a consistent fitment across both model years covered in the specifications.
Because the 5008 uses a BA15s single-contact bayonet base and the 3893 uses a BAY15d dual-contact bayonet base, substituting one for the other in any socket is not possible without a physical mismatch, regardless of voltage compatibility.