Toksis 3 Report post Posted October 18, 2022 Ok, I tried to change oil my differential but the whistling gotten worst. So i decide to buy a second hand differential. What should I look for if it fits? My vin is nk69753. There are 2 differential in realoem.com. And as discussed, I should replace the oil to a heavy 80w 140 instead of 75w90. What car year of the differential is now durable. My car is 320i 2006. Thank you. Quote Share this post Link to post Share on other sites
