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    Bulb Sizes (Headlight, Tail, Fog)

    2018 Subaru Outback Bulb Size Guide

    AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.

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    Quick reference

    LocationBulb SizeType
    Low Beam HeadlightH11Halogen
    High Beam HeadlightHB3/9005Halogen
    Fog LightH16Halogen
    Daytime Running Light (DRL)LEDLED
    Front Turn Signal7440Incandescent
    Rear Turn Signal7440Incandescent
    Brake Light7443Incandescent
    Tail Light7443Incandescent
    Reverse Light921Incandescent
    License Plate168Incandescent
    Side Marker168Incandescent
    Dome/Map LightDE3175Incandescent

    LED vs halogen upgrade considerations

    When upgrading from halogen to LED bulbs in your 2018 Subaru Outback, there are a few things to keep in mind. First, you may encounter CANBUS errors. This is because LED bulbs draw less power than halogen bulbs, which can make your car's computer think that a bulb is burned out. To fix this, you may need to install a CANBUS adapter. Second, you may need to use an adapter to get the LED bulb to fit properly in the housing. This is because LED bulbs are often a different size and shape than halogen bulbs. Finally, be sure to choose LED bulbs that are the correct color temperature for your car. The color temperature of a bulb is measured in Kelvin (K). A lower Kelvin rating will produce a warmer, more yellow light, while a higher Kelvin rating will produce a cooler, more blue light. For headlights, it is generally recommended to choose a bulb with a Kelvin rating of 5000K to 6000K.

    How to replace each bulb

    • Low Beam Headlight: The low beam headlight is located in the front of the car, on the driver's side. To replace it, you will need to open the hood and locate the headlight housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • High Beam Headlight: The high beam headlight is located in the front of the car, on the passenger's side. To replace it, you will need to open the hood and locate the headlight housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Fog Light: The fog light is located in the front of the car, on the driver's side. To replace it, you will need to remove the front bumper. Once the bumper is removed, you will be able to access the fog light housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Daytime Running Light (DRL): The DRL is located in the front of the car, on the passenger's side. To replace it, you will need to remove the front bumper. Once the bumper is removed, you will be able to access the DRL housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Front Turn Signal: The front turn signal is located in the front of the car, on the driver's side. To replace it, you will need to open the hood and locate the turn signal housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Rear Turn Signal: The rear turn signal is located in the back of the car, on the driver's side. To replace it, you will need to open the trunk and locate the turn signal housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Brake Light: The brake light is located in the back of the car, on the driver's side. To replace it, you will need to open the trunk and locate the brake light housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Tail Light: The tail light is located in the back of the car, on the driver's side. To replace it, you will need to open the trunk and locate the tail light housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Reverse Light: The reverse light is located in the back of the car, on the driver's side. To replace it, you will need to open the trunk and locate the reverse light housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • License Plate: The license plate light is located in the back of the car, above the license plate. To replace it, you will need to remove the license plate. Once the license plate is removed, you will be able to access the license plate light housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Side Marker: The side marker light is located on the side of the car, near the front wheel. To replace it, you will need to remove the front wheel. Once the wheel is removed, you will be able to access the side marker light housing. The bulb is held in place by a retaining clip. To remove the bulb, simply press down on the clip and pull the bulb out.
    • Dome/Map Light: The dome/map light is located in the ceiling of the car, above the front seats. To replace it, you will need to remove the dome/map light lens. The lens is held in place by a few clips. To remove the lens, simply pry it off with a flathead screwdriver. The bulb is located behind the lens. To remove the bulb, simply pull it out.

    Common lighting issues for this generation

    One of the most common lighting issues for the 2018 Subaru Outback is a burned-out headlight. This can be caused by a number of factors, including a faulty bulb, a bad connection, or a problem with the car's electrical system. If you have a burned-out headlight, it is important to have it replaced as soon as possible. Another common lighting issue is a flickering headlight. This can be caused by a loose connection or a problem with the car's electrical system. If you have a flickering headlight, it is important to have it checked out by a qualified mechanic.

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    More specs for the 2018 Subaru Outback

    Oil Capacity & Filter

    Capacity, weight, filter PN, drain plug torque, change interval.

    Fluid Type Specs

    Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.

    Coolant Capacity & Type

    Total system capacity, OEM coolant spec, flush interval, bleed tips.

    Transmission Fluid & Service

    Trans model, fluid spec, capacity, filter PN, service interval.

    Torque Specifications

    Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.

    Brake Pad & Rotor Specs

    Pad PNs, rotor size, min thickness, caliper torque.

    Tire Size & Pressure

    OEM size, cold psi, bolt pattern, wheel size, TPMS.

    Battery Size & Group

    Group size, CCA, AGM/flooded, dimensions, reset note.

    A/C Refrigerant & Oil

    R-134a or R-1234yf, charge oz, PAG oil spec.

    Factory Maintenance Schedule

    Service intervals by mileage, severe-duty notes, known issues.

    Towing Capacity & Payload

    Max tow, payload, GVWR/GCWR, hitch class by trim.

    Fuse Box Diagram & Amperage

    Fuse box locations, layout, amps, and what each fuse controls.

    Serpentine Belt Routing & Length

    Belt routing, length, rib count, OEM + aftermarket PNs.

    Wheel Alignment Specifications

    Camber, caster, toe ranges (front & rear), adjustability notes.

    Paint Color Codes

    All factory colors with paint codes, sticker location, touch-up tips.

    Wiper Blade Sizes

    Driver/passenger/rear blade size, attachment, OEM + cross-refs.

    Spark Plug Type & Gap

    Plug PN, gap, torque, interval by engine.

    Transmission & Axle Gear Ratios

    Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.

    Key Fob Programming

    DIY programming steps, FCC ID, fob PN, battery, transponder.

    Same spec — other model years

    Maintenance & repair guides

    Browse by make

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