Knock Sensor A failed Knock Sensor will often have no noticeable symptoms beyond a check engine light or engine ping or knock, but it does cause your Subaru to operate inefficiently and produce higher emissions.
Some items are supplied in bulk packs (of 5 or 10, for example) by manufacturers. We repack them to the amount you have purchased. This means that you may not get an original package shown in our photos, but the item is still genuine. Please note also your item may be open but this is just to take the photo for this listing.
