What Size Bulbs Does a 1990 Mazda RX7 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 1990 Mazda RX7 Have?
The 1990 Mazda RX7 features an extensive lighting system with 13 bulb positions. It uses halogen technology with H6054 LED low beams and 158 high beams in a dual-bulb configuration. The RX7 has been available from 1979 to 1995, and the 1990 model falls in the mid-generation years.
Can You Put LED Bulbs in a 1990 Mazda RX7?
To upgrade the 1990 Mazda RX7 headlights to LED, you will need a H6054 LED LED kit for the low beams and a 158 LED kit for the high beams. Start with the low beams since they are used most often and have the biggest impact on nighttime visibility. For the fog lights, a H3 LED LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 1990 Mazda RX7
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 1990 RX7 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 H3 LED fog light socket.
Full Upgrade Bundle
Upgrade All 13 Positions at Once
1990 Mazda RX7 Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | H6054 LED | Buy H6054 LED |
High Beam | 158 | Buy 158 |
Fog Light | H3 LED | Buy H3 LED |
Brake Light | 1156 LED | Buy 1156 LED |
Side Marker | 194 LED | Buy 194 LED |
Turn Signal Front | 1157 LED | Buy 1157 LED |
Turn Signal Rear | 1156 LED | Buy 1156 LED |
Dome Light | 168 or DE3175 | Buy 168 or DE3175 |
License Plate | 168 or 89 | Buy 168 or 89 |
Map Light | 168 | Buy 168 |
Parking Light | 1157 | Buy 1157 |
Reverse Light | 1156 | Buy 1156 |
Trunk Light | DE3022 | Buy DE3022 |
Want to upgrade everything at once?
Shop Complete LED Kit for 1990 Mazda RX7How Long Do 1990 Mazda RX7 Headlight Bulbs Last?
Standard halogen headlights on the 1990 Mazda RX7 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 36 years old, the original bulbs on your RX7 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 1990 Mazda RX7?
The H6054 low beam bulb on the 1990 Mazda RX7 is a specific fitment. There are no widely recognized cross-compatible alternatives, so make sure to purchase the exact H6054 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.
1990 Mazda RX7 Headlight FAQ
Did Mazda RX7 Bulb Sizes Change Over the Years?
Over its production run from 1979 to 1995, the Mazda RX7 has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 1990 model uses the earlier bulb specification that was in place before the change around 1993. Always verify the exact bulb size for your specific 1990 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other RX7 Years
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Other Vehicles That Use H6054 LED Bulbs
These vehicles from other makes also use a H6054 LED low beam bulb: