Hi everyone, I have a 1995 Honda Accord EX, 2.2L V-TEC engine, 120,000 miles on it. While checking my transmission fluid, I noticed oil leaking from a thing on top of the oil sending unit. I took it to the honda dealer but they won't give me any information unless I pay a $100.00 diagnostic fee. Needless to say, this fee has nothing to do with the cost of the repair if I let them fix it. Can anyone please tell me what this part is and if it is expensive?