Okay, so I guess "what gets done when" is up to the dealer ??? The
HondaOakland.com/2021-honda-pilot-maintenance-schedule does NOT show rear diff fluid or throttle body anywhere. Or check out
SouthPointHonda.com/honda-recommended-maintenance-schedule, which is the largest Recommended Maintenance I have ever seen, and has diff oil at 30k.
Unfortunately the owners manual lists just the MM codes but not the recommends mileage for them. Our '21 is rapidly closing on 15k so it will be interesting to see what my dealer recommends. I am not going to say anything about the fact out 2006 Pilot had 221k on it when we got our new one (sold it, still running fine), and I there are things on the '21 MM list we never did.
There are items which can not be given a certain set mileage or time limit due to too many factors. My oil life has always shown me about 10% per thousand miles while others on here have posted 10% per 5000, 6000, or 7000 miles. It is a matter of how the car is driven under what kind of conditions, and for how long such as short trips or long trips.
The 15000 miles for the first rear differential fluid change and then 30000 miles after has been posted many times as what owners are seeing and thus has been shown to be what miles are being driven before the code 6 pops up. My code 6 actually popped up around 12500 miles but it was just letting me know it would be due soon since I still had about 3000 miles or so before my next service. That's like I just changed my oil and filter yesterday and when I cleared the "B" code, the "A" code can be seen in the MM. Not that is is due now but that the next service will be at least the "A" item.
Transmission fluid exchange is showing by many owners to be around 30000 miles for the 6 speed, and 60000 miles for the 9 speed. Brake fluid code 7 calls for every 3 years and it has been found that the first 3 years is from when the car was built, not when it was sold or first put into use.
Honda themselves have NO throttle body cleaning or service listed. They do say to use a Top Tier fuel however.
Many dealerships will try to upsell products and services on their own "recommendations' much sooner than or even if the service isn't even listed by Honda. Remember that the service department of dealerships bring in more profit than the sales department and that most service advisors work on commission and bonus pay.
You can either go by the MM, go by what the dealership recommends, or make your own decision as to when to do something. I change oil, oil filter, and rotate tires every 5000 miles. I did the rear differential at 15000 miles and will do the next one at 45000 miles. I changed the brake fluid around the 3rd year anniversary of the cars build date. I also just replaced the air cleaner and the cabin filter yesterday at about 13 months of use since their first replacement. I did my 9 speed transmission fluid exchange around 30000 miles and will follow that up every 30000 miles. I will do the front transfer unit fluid change during my next oil change at 40000 miles. That isn't called for until the 60000 mile transmission fluid change on my 9 speed.
I do these services myself so if I had to go to a dealership I would more than likely just follow the MM and not a dealership recommendation.
