方向盤內的異音，聽起來像是方向燈的自動歸位的卡榫有問題!
把方向盤拆下來轉轉看就知道了!!
故障碼P0741是變速箱內的扭力轉換器有問題!
原廠有出技術通報!一般是扭力轉換器跟輪入軸間的一個O形墊片磨損造成的!
圖中箭頭處，你用手指去摸，你能感覺到粗糙的邊緣有一點破裂!
This Service Information bulletin supersedes SI 24 03 06 dated February 2008.
designates changes to this revision
SUBJECT
ZF 5HP19 Transmission - Diagnosis of EGS FC 048 (30 hex)
MODEL
E46: 323i, 325i, 330i with M52TU, M54, M56 and ZF 5HP19
E39: 525i, 530i with M54 and ZF 5HP19
E85: Z4 roadster 2.5, 3.0 with M54 and ZF 5HP19
SITUATION
"Service Engine Soon" is illuminated and fault code 048 "Converter lock-up excessive slip" (30 hex or P0741) is stored in the EGS transmission control module.
CAUSE
Possible cause: deterioration of the torque converter turbine shaft seal
PROCEDURE
Remove the torque converter. For the removal procedure, refer to Repair Manual RA24 40 002.
[S2406U01.JPG]
2. Drain the fluid out of the torque converter, and carefully inspect the turbine shaft seal (1) INSIDE THE BOTTOM OF THE TORQUE CONVERTER for signs of damage (cracks, splits, etc.).Helpful Hints:
3. Use a small flashlight to illuminate inside the bottom of the torque converter to examine the turbine shaft seal. The turbine seal is brownish orange in color and measures approximately 1" in diameter.
If evidence of seal deterioration is found, replace the torque converter.
Additionally, if the transmission fluid shows signs of deterioration ("dirty fluid"), the fluid should be replaced in conjunction with the fluid strainer. For the strainer replacement procedure, refer to Repair Manual RA24 31 151.
Refill and/or top off the fluid level according to Repair Manual RA 00 11 500, using ESSO ATF LT 71141 (P/N 83 22 9 407 807).
If after careful inspection it appears that the turbine seal is intact, contact Automatic Transmission Enhanced Technical Support (TeileClearing) for further diagnostic instructions. Submit the "regular technical support" PuMA case, referencing SI B24 03 06 in its title.
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.