What Size Bulbs Does a 2017 Land Rover Discovery Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Hard (Tight clearances)
Est. Replacement Cost
$15 - $40 (Halogen) / $30+ (LED)
What Lighting System Does the 2017 Land Rover Discovery Have?
The 2017 Land Rover Discovery 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 Discovery has been available from 1994 to 2019, and the 2017 model falls in the late-generation years.
Can You Put LED Bulbs in a 2017 Land Rover Discovery?
Upgrading the 2017 Land Rover Discovery 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 LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 2017 Land Rover Discovery
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. Land Rover vehicles are known for tight engine bay clearances around the headlight assembly. You may need to remove the air intake duct, battery cover, or wheel well liner to access the bulbs. Budget 30 to 45 minutes per side for your first replacement. 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 13 Positions at Once
2017 Land Rover Discovery Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | H7 LED | Buy H7 LED |
High Beam | H7 LED | Buy H7 LED |
Fog Light | LED Fog Light | Buy LED Fog Light |
Brake Light | LED Bulb | Buy LED Bulb |
Side Marker | LED Bulb | Buy LED Bulb |
Turn Signal Front | 7444NA LED | Buy 7444NA LED |
Turn Signal Rear | LED Bulb | Buy LED Bulb |
Reverse Light | LED Bulb | Buy LED Bulb |
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 |
Trunk Light | LED Light | Buy LED Light |
Want to upgrade everything at once?
Shop Complete LED Kit for 2017 Land Rover DiscoveryHow Long Do 2017 Land Rover Discovery Headlight Bulbs Last?
Standard halogen headlights on the 2017 Land Rover Discovery 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 9 years old, the original bulbs on your Discovery 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 2017 Land Rover Discovery?
The H7 low beam bulb on the 2017 Land Rover Discovery 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.
2017 Land Rover Discovery Headlight FAQ
Did Land Rover Discovery Bulb Sizes Change Over the Years?
Over its production run from 1994 to 2019, the Land Rover Discovery has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 2017 model uses the earlier bulb specification that was in place before the change around 2018. Always verify the exact bulb size for your specific 2017 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other Discovery 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: