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LED Headlights on Gen 4 Prius

Discussion in 'Gen 4 Prius Technical Discussion' started by padroo, Feb 14, 2018.

  1. padroo

    padroo Senior Member

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    Does anyone know the part number of the LED headlight bulbs on the Gen 4 Prius and how much they cost.

    I am trying to brace myself after having HID headlights in my old Prius. lol
     
    #1 padroo, Feb 14, 2018
  2. alanclarkeau

    alanclarkeau Senior Member

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    I vaguely remember reading that they should last the "life of the car". LED is very different technology from HID, which have a reputation for not being long-life.

    Should you smash one, there was mention last year of 1200-1500 each, but can't remember if it was $AU, $US or €?
     
    #2 alanclarkeau, Feb 14, 2018
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  3. Tideland Prius

    Tideland Prius Moderator of the North
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    Not a Gen 4 but a Prime but at least it gives you an idea

    Radar emblem | PriusChat


    LED headlamps = US$1,635.90 each (They used to be US$5,000 each on the LS600h L, 10 years ago)


    That's for the complete assembly. I don't know about the individual bulbs (or whether they can even be replaced individually as they may be a cluster).
     
    #3 Tideland Prius, Feb 14, 2018
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  4. padroo

    padroo Senior Member

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    I have found lens assemblies in the $700 - $800 range but haven't found any reference to the actual LED light bulb.

    Maybe they will last the mostly advertised 50,000 hours. lol
     
    #4 padroo, Feb 14, 2018
  5. alanclarkeau

    alanclarkeau Senior Member

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    Yes, don't worry - I don't plan to keep mine the 2 - 2½ million kilometers.
     
    #5 alanclarkeau, Feb 14, 2018
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  6. Tideland Prius

    Tideland Prius Moderator of the North
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    Keep in mind that the LED headlights are used as DRLs in Canada so if there's anything wrong, you'll hear from us first.

    This applies to the Corolla, Gen 4 and Prime that use the low beam (where applicable) at reduced power as the DRL.
     
    #6 Tideland Prius, Feb 14, 2018
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  7. Elektroingenieur

    Elektroingenieur Senior Member

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    In the U.S. market, Toyota sells only the complete headlamp unit assemblies as service parts, and there are no LED headlight lamps (bulbs), as such. I assume the LEDs are part of an assembly designed by Koito for this application. See my previous postings and Toyota’s parts catalog:

    Head and fog light modding | PriusChat
    4th Gen LED headlight durability | Page 2 | PriusChat

    HEADLAMP. For 2016 Toyota Prius Four HYBRID | Toyota
     
    #7 Elektroingenieur, Feb 15, 2018
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  8. bbald123

    bbald123 Thermodynamics Law Enforcement

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    Also, be aware the part number (and cost, presumably) differs if you have auto-highbeams.
     
    #8 bbald123, Feb 15, 2018
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  9. RCO

    RCO Senior Member

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    As long as you remember that the 50,000 hours figure was never measured in the first place. It's just a big number used by the manufacturers to emphasize they last a lot longer than incandescent etc, to justify a higher cost.
     
    #9 RCO, Feb 22, 2018
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  10. alanclarkeau

    alanclarkeau Senior Member

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    Well maybe - but I have no intention of hanging around long enough to check!!!!! I've an appointment in Heaven within the next 30 yrs, I'm guessing.
     
    #10 alanclarkeau, Feb 22, 2018
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  11. bbald123

    bbald123 Thermodynamics Law Enforcement

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    Actually, the LED headlight manufacturer did test them. But you should remember that the test does not come close to actual use patterns, which is why the actual life is often so different from tested life.

    https://www.edn.com/electronics-blogs/led-zone/4441442/How-long-do-LEDs-really-last-
     
    #11 bbald123, Feb 23, 2018
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  12. alanclarkeau

    alanclarkeau Senior Member

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    I'm not sure if it's translatable, but I have a clock radio which I bought in the mid '70s with a LED display - it's still working fine. They do change every minute, some staying on, others swapping around.

    There are also a few LED lights in various appliances, phone bases, wall outlets etc which are a decade or more old, and which are on constantly.
     
    #12 alanclarkeau, Feb 23, 2018
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  13. Prodigyplace

    Prodigyplace Senior Member

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    All US Gen 4 have auto high beams I believe.
     
    #13 Prodigyplace, Feb 23, 2018
  14. pilotgrrl

    pilotgrrl Senior Member

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    That was an option in 2016. They came on the Three with ATP.

    Posted via the PriusChat mobile app.
     
    #14 pilotgrrl, Feb 23, 2018
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  15. Prodigyplace

    Prodigyplace Senior Member

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    Other countries have auto leveling headlights that would be different too.
    I suspect LHD vs RHD are different due to aiming.
     
    #15 Prodigyplace, Feb 23, 2018
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  16. bbald123

    bbald123 Thermodynamics Law Enforcement

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    I hadn't even thought about that!
     
    #16 bbald123, Feb 24, 2018
  17. bbald123

    bbald123 Thermodynamics Law Enforcement

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    The testing method is to turn the test population on and leave them on until more than 50% burn out. Leaving lights on gives maximum hours of life because you don't have inrush current surges when turning them on from cold. LEDs also suffer inrush current when first turned on. Whether they suffer to a greater or lesser degree than incandescent bulbs, I don't know. But, I suspect the driver electronics make them much less susceptible to damage.
     
    #17 bbald123, Feb 24, 2018
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  18. RCO

    RCO Senior Member

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    Fair point, I suspect it's the surge experienced when switching on that would be the most demanding strain on an LED, not continuous running!
    LED
     
    #18 RCO, Feb 26, 2018
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