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Used for: Fog Light Bulb Front
Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam and Low Beam(with halogen headlights)
Used for: Headlight Bulb High Beam and Low Beam(with HID headlights)
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb(with halogen headlights), Tail Light Bulb Outer
Used for: License Plate Light Bulb
Used for: Parking Light Bulb, Turn Signal Light Bulb Front
Used for: Side Marker Light Bulb Front(with halogen headlights)
Used for: Side Marker Light Bulb Rear(with halogen headlights)
Used for: Tail Light Bulb Inner(with halogen headlights)
Used for: Tail Light Bulb Inner(with halogen headlights)
Used for: Turn Signal Light Bulb Rear(with halogen headlights)
Used for: Dome Light Bulb, Trunk or Cargo Area Light
Used for: Glove Box Light Bulb
Used for: Map Light Bulb
Used for: Map Light Bulb
This 2017 Ford Flex bulb size guide helps you verify the correct bulb by lighting position before you buy replacement parts. Because the Flex could be equipped with different headlight and rear lamp setups, the right bulb can depend on the exact location and on whether your vehicle has halogen or HID headlights.
Use this page to match the bulb type to the specific lamp on your 2017 Ford Flex, including headlights, fog lights, brake lights, turn signals, side markers, interior lights, and cargo-area lighting. Checking by position is the easiest way to avoid ordering the wrong bulb for your trim or lighting package.
Fitment can vary by trim, package, market, and body style, so always compare your vehicle’s existing bulb before ordering. The 2017 Ford Flex may use different bulbs for halogen and HID headlight setups, and some exterior lamps are LED on certain versions. If you are converting from halogen to LED aftermarket bulbs, make sure the replacement is compatible with the socket, polarity, and available space inside the housing. For the most reliable result, remove the installed bulb and confirm the number printed on it before purchase, especially for rear lamps and interior lights where small differences matter.
For 2017 Ford Flex models equipped with HID headlights, the high beam and low beam bulb is D3S.
Halogen headlight models use H13 for both the high beam and low beam positions.
The front fog light bulb is listed as H11 LED or H16 LED, depending on the exact lamp setup.
The front turn signal light bulb is 3457A.
The parking light bulb is 3457A.
With halogen headlights, the brake light bulb is 4157R. With HID headlights, the brake light bulb is LED.
The outer tail light bulb is 4157R on halogen-equipped versions.
With halogen headlights, the inner tail light bulb is 168 or 917. With HID headlights, the inner tail light bulb is LED.
With halogen headlights, the rear turn signal bulb is 4157. With HID headlights, the rear turn signal bulb is LED.
The rear side marker light bulb for halogen-equipped models is 194NA.
The front side marker light bulb for halogen-equipped models is 168NA.
The back up reverse light bulb is 921.
The dome light and trunk or cargo area light both use 578. The map light uses 2825 or 98, and the glove box light uses 161.
The license plate light bulb is 6418.
Because trim and lighting package differences can change the correct bulb, and the same 2017 Ford Flex may use different bulbs for halogen versus HID setups. Checking the installed bulb helps confirm the exact fitment before you order.