What Size Bulbs Does a 1984 Isuzu I-Mark Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Easy (Plug and Play)
Est. Replacement Cost
$15 - $40 (Halogen) / $30+ (LED)
What Lighting System Does the 1984 Isuzu I-Mark Have?
The 1984 Isuzu I-Mark features an extensive lighting system with 11 bulb positions. It uses halogen technology with a single 6052 LED dual-filament bulb handling both low and high beams. The I-Mark has been available from 1982 to 1990, and the 1984 model falls in the early-generation years.
Can You Put LED Bulbs in a 1984 Isuzu I-Mark?
Upgrading the 1984 Isuzu I-Mark to LED headlights is straightforward since it uses a single 6052 LED dual-filament bulb for both low and high beams. You only need one pair of LED bulbs to upgrade both functions. Look for a 6052 LED LED kit that specifically supports dual-filament operation to ensure both beams work correctly. For the fog lights, a LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 1984 Isuzu I-Mark
To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. Older model years like the 1984 I-Mark typically offer easy access to the headlight bulbs from behind the headlight assembly under the hood. Most owners can complete the swap in under 10 minutes per side. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the LED Fog Light fog light socket.
Full Upgrade Bundle
Upgrade All 11 Positions at Once
1984 Isuzu I-Mark Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | 6052 LED | Buy 6052 LED |
High Beam | 6052 LED | Buy 6052 LED |
Fog Light | LED Fog Light | Buy LED Fog Light |
Brake Light | Brake Light Assembly | Buy Brake Light Assembly |
Side Marker | 194 LED | Buy 194 LED |
Turn Signal Front | 1073 LED | Buy 1073 LED |
Turn Signal Rear | 1073 LED | Buy 1073 LED |
Reverse Light | 1073 | Buy 1073 |
License Plate | 89 or 194 | Buy 89 or 194 |
Parking Light | 89 | Buy 89 |
Trunk Light | 158 | Buy 158 |
Want to upgrade everything at once?
Shop Complete LED Kit for 1984 Isuzu I-MarkHow Long Do 1984 Isuzu I-Mark Headlight Bulbs Last?
Standard halogen headlights on the 1984 Isuzu I-Mark have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 42 years old, the original bulbs on your I-Mark are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 1984 Isuzu I-Mark?
The 6052 low beam bulb on the 1984 Isuzu I-Mark is a specific fitment. There are no widely recognized cross-compatible alternatives, so make sure to purchase the exact 6052 size. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
1984 Isuzu I-Mark Headlight FAQ
Did Isuzu I-Mark Bulb Sizes Change Over the Years?
Over its production run from 1982 to 1990, the Isuzu I-Mark has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 1984 model uses the earlier bulb specification that was in place before the change around 1988. Always verify the exact bulb size for your specific 1984 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other I-Mark Years
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Other Vehicles That Use 6052 LED Bulbs
These vehicles from other makes also use a 6052 LED low beam bulb: