08-535i sport

So I took it in today, again drove fine to the shop. They pulled codes and called me to say there were three codes

1) A misfire in cylinder 5
2) A crankshaft sensor error
3) do not recall, but was caused by one of the other two.

First told me that #1 was the source of my issue and the misfire was causing the computer to send bad information to transmission. Said I needed spark plugs and coils replaced. I had not had them done, and I could not confirm if they were ever done so I said do it. He said he was not 100% certain that was the primary cause, but would have to be the starting point.

$900

Called me an hour later, upon going to pull the car in the shop, it did exactly what I experienced with the transmission malfunction (I know! how often does the problem get replicated at the shop!!!, my lucky day...I guess?)

They pulled codes again and this time only the crankshaft sensor code showed up. I have read here and in other forums that this seems to be a common culprit for my symptoms.

Another $300.

The car will not be done until Monday but they seem fairly certain now they have found the culprit and I am getting my plugs and coils changed that I guess were needed also...I never noticed the misfire but he said all three came within a few hundred miles of each other.

The really good news is he said they took it out and drove it before they pulled it in the first time and he said "your transmission is flawless, there is definitely no problem with the internal mechanics there"

So hopefully I am back up and running perfect on Monday and out the door for $1200, $900 of which is really routine maintenance that was just over due.

Hopefully this helps others with a similar transmission issue, the crankcase sensor is a much easier fix than $7K for a new trans!!!

pcy

IMHO, $900 is too much for replacing spark plugs and ignition coils. Parts are $200 and takes 2 to 3 hours to replace them.

seanjordan20

$1100 that is way too much. You can do both in 2 hrs yourself. Spend $450 on the parts yourself and do it. It is not hard you will just get muscle failure changing the crankshaft sensor.

08-535i sport

Picked it up today, runs and drives better than when I bought it 2.5 years ago! Yeah, I know a lot of you would not pay $1100 for diagnosis, plugs, coils and the crankshaft sensor but I quit working on cars when I made enough money to pay someone to do it. I won't even do an oil change anymore...better things to do with my time than tear apart and fix cars. Fact is, it is fixed, my transmission is fine and I am happy with the outcome. Thanks for the input from all