Buick LaCrosse 2018 Bulb Size

Bulb size chart

Fog Light Bulb Front - H11 LED, H16 LED
Headlight Bulb High Beam and Low Beam - D3S
Back Up Reverse Light Bulb - 921
Brake Light Bulb - 7440R
Center High Mount Stop Light Bulb - LED
Daytime Running Light Bulb - LED
License Plate Light Bulb - 2825, 98
Parking Light Bulb - LED
Side Marker Light Bulb Front - LED
Side Marker Light Bulb Rear - LED
Stepwell Light Bulb - 194, 7441
Tail Light Bulb - LED
Turn Signal Light Bulb Front - LED
Turn Signal Light Bulb Rear - 7440
Dome Light Bulb - LED
Interior Door Light Bulb - 194, 7441
Map Light Bulb - LED
Trunk or Cargo Area Light - 194, 7441
Vanity Mirror Light Bulb - 7065

H11 LED Bulbs

Used for: Fog Light Bulb Front

View all 5 replacement options for size H11 LED →

H16 LED Bulbs

Used for: Fog Light Bulb Front

View all 5 replacement options for size H16 LED →

D3S Bulbs

Used for: Headlight Bulb High Beam and Low Beam

Philips D3S Standard Authentic Xenon HID

Philips D3S Standard Authentic Xenon HID

POWERFUL LIGHT FROM XENON HID BULBS OFFER MAXIMUM SAFETY: Xenon HID (High Intensity Discharge) headlight bulbs offer twice as much light* for safer driving in all conditions while consuming 50% less power. The intense white light produced by the Xenon HID lamps is comparable to daylight. Studies have demonstrated that xenon automotive lighting helps drivers to concentrate on the road and to distinguish obstacles and road signs much faster than traditional lamps. *Compared to standard halogen bulbs

$79.99

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OSRAM XENARC D3S HID Xenon Headlight bulbs 66340

OSRAM XENARC D3S HID Xenon Headlight bulbs 66340

 Extremely Long Life with precise light distribution & consistent performance - can efficiently work for 4000 hours.  All HID lights discolor to get whiter/bluer over usage & dim down. When comparing this NEW bulb against your OLD bulb, the NEW bulb may look warmer in color, which is normal. Replacing in PAIR is suggested. Extremely Long Life with precise light distribution & consistent performance. 100% legal for On/Off-road use | Replace in pairs for optimal performance.

$108.99

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View all 10 replacement options for size D3S →

921 Bulbs

Used for: Back Up Reverse Light Bulb

View all 14 replacement options for size 921 →

7440R Bulbs

Used for: Brake Light Bulb

View all 8 replacement options for size 7440R →

2825 Bulbs

Used for: License Plate Light Bulb

View all 12 replacement options for size 2825 →

98 Bulbs

Used for: License Plate Light Bulb

View all 10 replacement options for size 98 →

194 Bulbs

Used for: Stepwell Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light

View all 21 replacement options for size 194 →

7441 Bulbs

Used for: Stepwell Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light

KATUR T20 White/Amber Switchback LED Light Bulbs (7441)

KATUR T20 White/Amber Switchback LED Light Bulbs (7441)

The KATUR T20 White/Amber Switchback LED Light Bulbs (7441) are a great upgrade for your vehicle's lighting. These energy-efficient bulbs have a 12V operating voltage and are designed to last 50,000 hours, 50 times longer than traditional incandescent bulbs. The single-contact 7440 LED light bulb replaces most auto car incandescents and is well-matched with the original incandescent lights. The easy plug-and-play installation means you just have to plug it into the socket, and flip the bulb horizontally if it does not light up to match the + and - polarity. With 42 2835 SMD LED lights, this bulb provides bright and versatile white/amber switchback lighting. It is CE/RoHS compliant, ensuring high standards and quality. Choose the KATUR T20 White/Amber Switchback LED Light Bulbs for a longer-lasting and more versatile lighting solution.

$17.99

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View all 13 replacement options for size 7441 →

7440 Bulbs

Used for: Turn Signal Light Bulb Rear

View all 8 replacement options for size 7440 →

7065 Bulbs

Used for: Vanity Mirror Light Bulb

TUINCYN Festoon 7065 LED Interior Bulb

TUINCYN Festoon 7065 LED Interior Bulb

Discover the brilliance of the TUINCYN Festoon 7065 LED Interior Bulb, a perfect blend of design and functionality tailored for modern illumination needs. Freshly designed and 100% brand new, this bulb is compatible with a standard 31MM socket and is powered by the 5630 SMD LED technology. With 8 LEDs per bulb, it promises a luminous experience. Its wide 150-degree lighting angle ensures a broad glow, making every corner visible. Installation is a breeze; just plug it in and enjoy the brilliance without any complex wiring. Its sturdy design, achieved through point-to-point welding, ensures durability. The LED technology not only provides brighter light but also conserves power. Moreover, its 360-degree beam angle guarantees comprehensive lighting with quick response times. Choose the TUINCYN Festoon 7065 for an unmatched interior lighting journey.

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Wiseshine 7065 LED Interior Festoon Bulbs

Wiseshine 7065 LED Interior Festoon Bulbs

Introducing the Wiseshine 7065 LED Interior Festoon Bulbs - a perfect replacement for traditional Festoon Miniature Halogen light bulbs, including models like DE3175, DE3021, DE3022, 6428, and 7065. Crafted with precision, each bulb is powered by 2 super-bright 5050 chipsets delivering 1.5 watts and producing an individual light intensity of 90-100 lumens. Enhanced with a robust thick copper Aluminum Base Board, these bulbs promise an extended lifespan of up to 50,000 hours, ensuring prolonged brilliance and reliability. Upgrade to the Wiseshine 7065 for a brighter and longer-lasting lighting solution.

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View all 12 replacement options for size 7065 →

This page covers bulb sizes for the 2018 Buick LaCrosse and helps you verify the correct bulb by lighting position. Whether you are replacing an exterior lamp or an interior bulb, matching the bulb to the exact location is the best way to avoid fitment mistakes.

The 2018 LaCrosse uses a mix of LED lighting and replaceable bulb types depending on the position. Use this guide to identify the right bulb size for headlights, turn signals, reverse lights, license plate lights, cabin lights, and other common lighting points on the car.

Trim level, lighting package, market, and body style can change the bulb used on a 2018 Buick LaCrosse, so always confirm the installed bulb before buying replacements. Some positions are LED assemblies, while others may use halogen-style bulbs or specific replaceable sizes, and aftermarket LED conversions can affect beam pattern, brightness, and warning messages. If you are upgrading from halogen to LED or replacing a previous owner’s modification, compare the old bulb, connector, and housing clearance first to make sure the new bulb fits and functions correctly.

FAQ

What bulb does the 2018 Buick LaCrosse use for the low beam and high beam headlights?

The headlight bulb type listed for both high beam and low beam on the 2018 Buick LaCrosse is D3S.

What is the front fog light bulb size on a 2018 Buick LaCrosse?

Front fog light fitment can vary by version, but the listed options are H11 LED and H16 LED. Check the installed bulb and housing before ordering.

What bulb size is used for the rear turn signal on this car?

The rear turn signal bulb listed for the 2018 Buick LaCrosse is 7440.

What bulb does the brake light use?

The brake light bulb listed for this model is 7440R.

What is the reverse light bulb size?

The back up reverse light bulb listed for the 2018 Buick LaCrosse is 921.

Are the front turn signal, parking light, tail light, and daytime running light bulbs replaceable?

Those positions are listed as LED on this page. In many cases that means the light is part of an LED assembly rather than a simple replaceable bulb, so verify the exact housing before attempting a repair.

What bulb size is used for the license plate lights?

The license plate light bulb options listed are 2825 and 98.

What bulb is used for the trunk or cargo area light?

The trunk or cargo area light uses 194 or 7441, depending on the exact vehicle configuration.

What bulb size fits the dome light, map light, and interior door lights?

The dome light and map light are listed as LED, while the interior door light uses 194 or 7441.

What bulb is used for the stepwell light and vanity mirror light?

The stepwell light uses 194 or 7441, and the vanity mirror light uses 7065.

Do trim levels affect bulb fitment on the 2018 Buick LaCrosse?

Yes. Trim level, lighting package, and market can change the bulb type or whether a light is LED assembly-based, so it is important to match the bulb to the exact vehicle configuration.

Should I check the old bulb before ordering a replacement?

Yes. Checking the installed bulb is the safest way to confirm fitment, especially if the car has been modified, repaired, or fitted with aftermarket LED bulbs.

Buick LaCrosse Bulb Size by Year