To replace a 2008 Toyota Prius headlight, you’ll need to remove the entire headlight assembly first. Open the hood and extract the engine bay cover by removing six plastic clips with a flat-head screwdriver. Unfasten three 10mm bolts securing the housing—one at the top, one on the inner fender, and one at the lower front. Disconnect the three wiring harnesses, then carefully lift the assembly clear of its locator pins. The complete procedure covers both HID and halogen bulb replacement with proper adjustment techniques.
Gather Your Tools and Materials
Before you begin the headlight replacement process, assemble the necessary tools to secure efficient workflow and prevent mid-task interruptions. You’ll need a Phillips head screwdriver, 10mm and 21mm sockets, and a thin flat-head screwdriver for clip removal. Include a trim tool set for plastic retainers and nitrile gloves to prevent bulb contamination from finger oils.
For headlight types, 2006-2009 HID models require OEM Philips D4R bulbs at 4300K, while halogen variants use 9003/HB2 bulbs. Verify specifications in your owner’s manual. Among replacement tips, consider non-OEM D4R alternatives offering cost savings and color options. Safety glasses protect against debris, and a flashlight illuminates confined spaces. Torque wrenches verify proper fastener tension during reassembly. For optimal results, ensure your vehicle is parked on a level surface before beginning work. Professional headlight replacement services offer a 12-month/12,000-mile guarantee for added peace of mind.
【KDLT003 Ballast replacement】Also known as Headlight Control Unit, a crucial part of HID lighting system, provides the voltage needed to start the lamp and regulates the electrical current of the light once it is lit. A failed ballast will cause your bulb to burn. It is a perfect solution for 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Lexus SC430 ES350 ES350h LS460 LS460L LS600h RX350 RX450h GX460 GS300 GS350 GS430 GS450h Gs460 IS250 IS350 IS350F IS250C
【Important Notice】The packaging includes a pair of TLEVELCL D4R hid headlight bulbs, perfectly compatible with Toyota 2006-2009 Prius. Some models may have halogen and xenon versions, and our D4R HID bulb is only suitable for upgrading and replacing xenon versions. Please confirm your model year and bulb type before placing an order
Prepare the Engine Bay for Access
With tools assembled, open the hood by pulling the release lever on the driver’s side lower panel until you hear the latch pop. Reach under the hood’s front edge and pull the secondary lever located above the Toyota logo on the right side. Lift the hood and secure it with the prop rod inserted into the front hole. Locate the six plastic clips securing the engine bay cover around its perimeter. Insert a thin flat-headed screwdriver under each clip and pry upward to release them from their retaining points. Remove the cover to expose the headlight assembly mounting area. When working with the headlight assembly, use dielectric grease on electrical connections to ensure optimal performance. For coolant management during this procedure, identify the inverter bleeder valve at the front of the inverter assembly, accessible with a 10mm socket if pressure release becomes necessary. Ensure all hoses and wiring are positioned out of the way to prevent obstructions during the headlight replacement process.
Access the Driver Side Headlight Assembly
Removing the driver-side headlight assembly requires unfastening three 10mm bolts positioned at the top, inner fender, and lower front of the housing. Use your 10mm socket and ratchet to access the upper bolts after removing the engine cover. Pull the plastic fender edge outward to disengage bumper clips, creating lateral clearance without full bumper removal. This headlight removal tips approach allows access to the inner-fender bolt behind the wheel well liner. Remove Phillips screws and three push-pins along the top trim. Use a thin flat-head screwdriver to pop up the holders on the plastic clips before pulling them out. Before extracting the assembly, practice electrical connector care by pressing the top retention tab on each of the three wiring harness connectors, then releasing the lower hooks. Ensuring the rubber boot seals properly will prevent moisture ingress into the headlight housing. When handling the bulb itself, avoid touching the glass to prevent oils from damaging halogen or LED bulbs. Lift the headlight’s top edge slightly while pivoting inward to clear molded locator pins and lower retention tabs.
Quality Construction: The headlight side marker light socket is designed using reliable materials that resist high temperatures for durability and longevity even in various conditions
【EXACT FIT】2006-2009 Toyota Prius***Not Compatible with Factory HID/Xenon Models***
🚗【APPLICABLE VEHICLES】Compatible with Toyota 4Runner 2013-2017, Camry 2014-2017, Celica 2005, Corolla 2009-2017, Corolla 2017-2018 with LED projector, Prius 2004-2015, Prius C 2012-2015, Venza2009-2017, Yaris 2012-2017
Access the Passenger Side Headlight Assembly
Although the passenger-side headlight assembly shares the same three-bolt mounting configuration as its driver-side counterpart, accessing these fasteners requires a slightly different approach due to the air intake assembly’s proximity. Begin headlight removal by detaching the air intake bracket to create adequate workspace. Remove two Phillips screws and three plastic clips from the upper grille using a thin flat-head screwdriver. Pull back the plastic fender liner and extract the 10mm bolt securing it. Unsnap the bumper edge by pulling back—full removal isn’t necessary. With partial bumper flex achieved, access and remove all three 10mm bolts securing the passenger assembly using your socket wrench. If push pins appear frozen, use pliers to loosen them before attempting removal. Pull the assembly forward slightly, then disconnect the three wiring harnesses by pressing their release buttons for complete headlight removal.
【EXACT FIT】2006-2009 Toyota Prius
Only Lens and Housing Included; Passenger Side Only
**OEM-Quality Assurance**: OEM#8117047160, 8113047160.Partslink Number: TO2518110, TO2519110.Meticulously tested for 100% compatibility, precisely modeled to fit your original car model: Compatible with 2006-2009 Prius Base. NOT Compatible with Factory HID Models and Touring. Applicable only to models launched after November 2005. NOTE: H/L beam bulbs include.
Remove the HID Headlight Bulb
Before disconnecting the electrical components, don nitrile gloves to prevent finger oils from contaminating the HID bulb’s glass surface—even microscopic residue will cause premature failure or bulb shattering when heated. Rotate the black socket cover counter-clockwise, overcoming significant resistance from the large O-ring seal. This step often requires assistance. Next, twist the wiring connector counter-clockwise and unplug the beige connector with gentle wiggling in the confined space. Depress the two spring clips outward per the blue arrow indicators while gripping only the plastic base. Pull the bulb straight back without touching the glass envelope or headlamp housing components. A thin flat-head screwdriver can help release stubborn wire clips if manual pressure proves insufficient. These installation tips guarantee successful HID bulb extraction—reversing this sequence installs the replacement unit while maintaining contamination-free handling protocols throughout.
【IMPORTANT】Replacement for factory D4R HID bulb only, NOT fit if your car stock Halogen headlight bulb even system say "fits".
2pcs packaged; Replacement part number: 66144 66140 85140 85415 (If there is any problem in the product,please feel free to contact us)
【Compatible with Toyota Models】The package includes 1 pair of d4r light bulbs, perfectly compatible with Toyota Prius 2006-2009. The same car model may have halogen and xenon versions. Our d4r replacment bulbs are only suitable for xenon replacement and not for halogen replacement. Please confirm whether your original car bulb is a xenon bulb before placing an order
Remove the Halogen Headlight Bulb
Halogen bulb replacement on the 2008 Prius requires accessing the rear of the headlight assembly through the engine bay rather than removing the front bumper cover. Begin by unplugging the wiring harness, then rotate the rubber cover counterclockwise to break the O-ring seal. Apply firm pressure if resistance occurs. On the passenger side, remove the single screw securing the plastic intake seal for clearance.
Understanding bulb types guarantees you’ve purchased the correct replacement before starting. The 2008 Prius uses halogen bulbs that provide reliable illumination for nighttime visibility. Push the wire holder inward and upward while supporting the bulb’s plastic base, then pull straight back. The bulb is secured by a swivel pin and hook that must be released at the correct angle. Installation tips include wearing nitrile gloves to prevent oil contamination and aligning the rubber cover’s teeth with slots during reassembly. The procedure typically requires 10-15 minutes without specialized tools.
Lights Dim Over Time, Replace In Pairs: Your lights are a pair, one is never turned on without the other. If one bulb burns out, the other isn't far behind. Replace your 9003 XtraVision Halogen bulbs in pairs for optimum performance.
Get the best lighting performance and an increased visibility and comfort on the road compared to basic bulbs
Fit TOYOTA Prius 2004 2005 2006 2007 2008 2009 , 9003/H4 for High beam and Low beam, 9006 for fog light
Install the New Headlight Bulb
With the old bulb removed, carefully unpack the new halogen replacement while wearing nitrile or latex gloves to prevent skin oil contamination of the glass envelope. Verify bulb orientation by matching base notches to housing slots, then insert straight into the socket without twisting to avoid bending filaments. Confirm the bulb flange sits flush against the reflector seat—slight rocking indicates improper seating. Position the retaining clip so its shoulders straddle the bulb base, then push clip ends under mounting hooks until you hear or feel a click confirming engagement. Reconnect the electrical connector by pushing it fully onto the bulb socket until seated. Turn the headlight switch on to verify low and high beam operation immediately. After verifying operation, you may need to adjust headlight beam alignment to ensure proper light distribution and avoid glare on oncoming traffic. Align the rubber dust cover tabs with housing slots and rotate clockwise until stops engage. Before completing reassembly, inspect the connector area for corrosion or moisture that may have contributed to the original bulb failure. If the headlight still does not function after installation, check for blown fuses or faulty wiring in the vehicle’s electrical system.
Seal and Secure the Headlight Cover
After verifying proper bulb operation, apply a continuous bead of butyl sealant around the headlight housing’s outer perimeter where the lens cover will mate. Cut sufficient material from the packaging using scissors, then separate the butyl from its backing—it’s sticky on both sides. Press the sealant into the housing groove, starting at any point around the perimeter. Use a heat gun to warm the butyl and OEM sealant for ideal seal installation. Align the lens cover with the retainers and slide it into position at the correct angle. Secure the assembly with 10 mm bolts on top and sides, hand-starting each fastener to prevent cross-threading. Most headlight replacement procedures can be completed in approximately 10-15 minutes with the proper tools and technique. Install push pins and clips around surrounding panels for moisture prevention and complete headlight retention. Proper sealing also ensures that your bulb brightness remains unobstructed by moisture accumulation inside the housing.
Test Your New Headlight
Turn your ignition to the “ON” position without starting the engine, then rotate the headlight switch through each setting to verify proper bulb operation. Observe the corresponding low-beam and high-beam patterns projected onto a wall or flat surface at short range, confirming correct filament activation. Check that the dashboard high-beam indicator illuminates when switching to high beam, validating the vehicle’s recognition of beam changes.
Use a multimeter to measure voltage at the headlight connector—expect approximately 12–14V with the switch ON. Test bulb socket continuity and verify the new bulb lights steadily without flickering, which may indicate loose connections or poor grounding. Confirm bulb compatibility with manufacturer specifications before performing headlight alignment adjustments to guarantee ideal beam pattern and road illumination. The 9005 bulbs commonly used for high beams deliver high lumen output suitable for long-range illumination. Consider popular upgrade options like Sylvania SilverStar Ultra for enhanced brightness if you want to improve visibility. Nighttime is ideal for checking headlight aim to ensure proper adjustment and safe visibility on the road.
