I made O’Reilly’s take back the first pair, as I found it unacceptable to be replacing them five months later, and they were still under warranty. I have a 2005 Outback, which I purchased in August of 2017, and am about to put my third set of headlight bulbs in: the first in January 2018 and the second in June. I’m really glad to have discovered this thread, and in particular have very much enjoyed some of your replies - your level of snarkiness rivals my own, so it’s been a fun read. Your experience, persistence in the face of well-intentioned ignorance, and levelheaded snark are much appreciated! This seems to fit the symptoms and known fixes quite well, and seems like a cheap and easy way to reduce the problem, though of course using the headlight on/off switch as designed and using proper LL bulbs is still also the best bet. It seems like the general recommended recipe is 4ga from battery to chassis, alternator, and starter, 8 or 10 ga for grounding block, both heads, throttle body, coil packs, fuse box, and pretty much anything else you think might benefit, up to and including transmission, rear diff, and suspension.(sounds crazy, but it’s true ) I don’t know if this has been gone over here yet(I Ctrl+F searched this page for ‘ground’, no relevant results), but on another Subaru forum, on a post about replacing corroded-off engine ground straps, they discovered that improvements to a few ground points greatly reduced voltage spikes at startup(verified with a multimeter) and drastically reduced premature bulb failure. Please understand the entire point of this post was to inform about the Dealers as well as aftermarket part suppliers are not always selling or installing the Long Life bulb the car requires. You can find out more information buy Calling 1-800 Subaru 3. after that you must go to a Subaru dealer to have them done under an extended warranty. If you have an affected vehicle and you have paid to replace the bulbs Subaru will reimburse you but only until November of 2016. This only applies to the 2010 to 2012 Legacy and Outback models, the original post apply’s to Subaru Cars made as early as 2005.
Subaru began sending out letters to Subaru Owners of 2010-2012 Legacy and Outbacks offering to reimburse for prior bulb replacements as well as cover bulbs for 10 years. Here is a link to buy the bulbs if you want to do it rightĪs always it’s up to you the owner of your car to know what is being used in the care and service of your Subaru, I will try to point out trends as I can to help you along the way. In the pictures below, I have tried to point out how it’s nearly impossible to look at the bulb and see a difference but on the Box itself there is a different part and catalog number. The H7LL bulb has a much stronger element that will last longer than the standard H7 bulb, yes it is a little more expensive but only a few dollars.
Subaru recognized the standard bulb wasn’t up to the task and superseded the part to another part number indicating a Long Life bulb part number 84920 AG020. Per application in many parts catalogs it will call for an H7. Your Subaru needs what is called a long life bulb or for the point of this article an H7LL in most 2005 and newer Subaru Models. One of the things I often try to convey is that there is a major difference between in parts quality. Heat coupled with vibration is ultimately what causes the element to break.
Now add the fact that as the car and the suspension ages the head light bulb now vibrates more than it did when the car is new. One of the key reasons the bulbs don’t last, is that the lights spend a lot of time on, which over time weakens the element as the constant heat is hard on the bulb. There are a few reasons as to why this happens. One of the more recent trends on the 2005 and newer platforms is for the head lights to live a very short life.
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