Maintenance inquiry

2015 BMW 650I

60,000 MILES • 4.4L • V8 • TURBO • 2WD • MANUAL

BOYTOWN

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Car listed above is the Gran Coupe model. I want to know at what mileage and times the following services are generally recommended/expected. my dealer keeps telling me it's all done by the car's sensors, but there has to be some kind of recommended intervals out there.

1. coolant flush.
2. transmission flush - do they recommend flush earlier than the OEM recommends (sometimes OEM says 100,000, but it's better to do it at 50,000).
3. oxygen sensor.
4. cabin air filter.
5. engine air intake filter.
6. do i rotate tires or no? I don't think I do because these tires are directional?
7. is it recommended to change fuel filter, oxygen sensor, replace valve cover gasket or bushings, differential fluid.
8. if a drop in K&N air filter (not the full air intake) gives any more power than the stock one. and do i need two or just one?
9. how much power an aftermarket intake would generate? how much louder is it? best price/value for increased power.

Mar 18, 2020 at 5:16 PM

KASEKENNY

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I am going to answer next to your list.

1. coolant flush - This is a system that doesn't require maintenance intervals. Basically they service it when it needs it. It is inspect during each maintenance item

2. Transmission flush - This is not recommended. It is fill for life and changed only when there is a reason to change it. This is becoming more prevalent in the industry so it is not uncommon.

3. Oxygen sensor - This is not a maintenance item on any vehicle. You only replace them when there is an issue.

4. Cabin air filter - Listed in the tables attached.

5. Engine air intake filter - Listed in tables attached.

6. Do I rotate tires or no? I don't think I do cause these tires are directional? - Yes you rotate every 6,000 miles or first sign of wear. However, you keep them on the same side. Rotate front to back and not side to side.

7. Is it recommended to change fuel filter - is not listed but should be changed every 30,000 miles.

replace valve cover gasket or bushings, differential fluid - Only when it needs it.

8. If a drop in K&N air filter (not the full air intake) gives any more power than the stock one. And do I need two or just one? - These filters say they will increase power but not anything you will notice. To me it is not worth the money unless you are making serious changes.

9. How much power an aftermarket intake would generate. How much louder is it? Best price/value for increased power - Again, this is not worth it to me but those that like tho alter the vehicles then it is a easy alteration. It is more for your personalizing the vehicle and not as much for performance.

Let me know if I missed any of your questions. Thanks

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Mar 18, 2020 at 5:40 PM