What Size Bulbs Does a 2018 Buick Regal TourX Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Moderate (Dust covers often present)
Est. Replacement Cost
$15 - $40 (Halogen) / $30+ (LED)
What Lighting System Does the 2018 Buick Regal TourX Have?
The 2018 Buick Regal TourX features an extensive lighting system with 13 bulb positions. It uses halogen technology with a single H7 LED dual-filament bulb handling both low and high beams. The Regal TourX has been available from 2018 to 2019, and the 2018 model falls in the early-generation years.
Can You Put LED Bulbs in a 2018 Buick Regal TourX?
Upgrading the 2018 Buick Regal TourX to LED headlights is straightforward since it uses a single H7 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 H7 LED LED kit that specifically supports dual-filament operation to ensure both beams work correctly. For the fog lights, a H8 LED LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 2018 Buick Regal TourX
The H7 bulb uses a spring clip or wire retainer that holds the bulb in the socket. To remove the old bulb, disconnect the wiring harness first, then twist the bulb counter-clockwise and pull it out. On the 2018 Regal TourX, you will likely encounter rubber dust covers behind the headlight housing. These pull off by hand or unscrew depending on the design. Allow about 15 to 20 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 H8 LED fog light socket.
Full Upgrade Bundle
Upgrade All 13 Positions at Once
2018 Buick Regal TourX Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | H7 LED | Buy H7 LED |
High Beam | H7 LED | Buy H7 LED |
Fog Light | H8 LED | Buy H8 LED |
Brake Light | LED Bulb | Buy LED Bulb |
Side Marker | LED Bulb | Buy LED Bulb |
Turn Signal Front | LED Bulb | Buy LED Bulb |
Turn Signal Rear | 921 LED | Buy 921 LED |
Dome Light | LED Bulb | Buy LED Bulb |
License Plate | LED Bulb | Buy LED Bulb |
Map Light | LED Bulb | Buy LED Bulb |
Parking Light | LED Bulb | Buy LED Bulb |
Reverse Light | 921 | Buy 921 |
Trunk Light | 175 | Buy 175 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2018 Buick Regal TourXHow Long Do 2018 Buick Regal TourX Headlight Bulbs Last?
Standard halogen headlights on the 2018 Buick Regal TourX 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 8 years old, the original bulbs on your Regal TourX 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 2018 Buick Regal TourX?
The H7 low beam bulb on the 2018 Buick Regal TourX is a specific fitment. There are no widely recognized cross-compatible alternatives, so make sure to purchase the exact H7 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.
2018 Buick Regal TourX Headlight FAQ
Did Buick Regal TourX Bulb Sizes Change Over the Years?
The Buick Regal TourX has maintained consistent bulb sizes across all model years from 2018 to 2019. The low beam has used a H7 LED bulb throughout, which means replacement parts and LED upgrade kits are widely available and well-tested for this model. If you find a deal on bulbs for any Regal TourX year in this range, they will fit your 2018 model.
Other Regal TourX Years
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Other Vehicles That Use H7 LED Bulbs
These vehicles from other makes also use a H7 LED low beam bulb: