My 2013 P85+ got a new drive unit last spring so it was time for the fluid change. I followed a guide on youtube (first hit if you search for "model s fluid change"). It's an easy job and the biggest part is removing and re-installing the plastic shield (many bolts of 2 different types). Plus the service center damaged 2 clips that I had to fix and left 2 push pins out all together.
What I didn't like was just how much metal there was in there. The magnetic drain plug had a thick coat of metal goo on it and the old fluid had a shimmer and sparkled. No wonder Tesla added an oil filter on the Model 3.
After seeing all the metal in the old fluid I'm not comfortable with only one fluid change. I will do another one next year and then probably more fluid changes every couple three years.
What I didn't like was just how much metal there was in there. The magnetic drain plug had a thick coat of metal goo on it and the old fluid had a shimmer and sparkled. No wonder Tesla added an oil filter on the Model 3.
After seeing all the metal in the old fluid I'm not comfortable with only one fluid change. I will do another one next year and then probably more fluid changes every couple three years.