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Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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Old 01-18-2020, 10:51 PM
1strimebmw 1strimebmw is offline
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2004 745li oil pressure

I just bought a 04 745li on monday and I knew it had a small oil leak on the alternator bracket so I've been keeping a close eye on the oil and adding when needed. It was running fine friday morning but when I left a couple hours later it sounded rough and the low oil pressure warning came on. I took it straight home and parked it. As I was pulling back in I noticed the line of oil in the driveway and when I check the oil again it was really low even though I added oil before I left. I looked up some things and decided to change the oil pressure sensor but it didnt help. I'm not really sure what the problem could be and since this is my first BMW I dont want go just start changing thing. Any info or suggestions would be very appreciated.
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Old 01-19-2020, 09:48 AM
mr.rainey mr.rainey is offline
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Originally Posted by 1strimebmw View Post
I just bought a 04 745li on monday and I knew it had a small oil leak on the alternator bracket so I've been keeping a close eye on the oil and adding when needed. It was running fine friday morning but when I left a couple hours later it sounded rough and the low oil pressure warning came on. I took it straight home and parked it. As I was pulling back in I noticed the line of oil in the driveway and when I check the oil again it was really low even though I added oil before I left. I looked up some things and decided to change the oil pressure sensor but it didnt help. I'm not really sure what the problem could be and since this is my first BMW I dont want go just start changing thing. Any info or suggestions would be very appreciated.
Unfortunately the issue will require you to removed the mounts to repair the alternator bracket leak..poor BMW design. These cars are temperamental and low oil pressure causes all kinds of drivability issues. Hesitations stalling and misfires
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