I had the same squeaking problem on the front driverside like 3 weeks ago. I put WD40 but the squeaking was still there. I did a search on this board and found out it might be a balljoint and that there was a recall. So I called then dealer asked them what recalls haven't been done to my car since I'm not the first owner. All the recalls were done. So I took my car to my mechanic told him what the problem might be, and he check and confirmed that it was the balljoint. So I had to replace the lateral arm and balljoint since they are one piece which isn't expensive $62 CND so that is like $40 USD. Now squeaking is gone :) . So before posting a question search first you will most likely find what you are looking for.