I have a 2003 3.0 ltr turbo diesel Hilux dual cab. Theres a loud vibration noise that is only heard in the cab with the windows up and mainly at idle. The vibration increases as the engine revs increase. The vibration can also be felt while sitting in the front passenger seat. It sounds like it is coming from just in front of the gear box on the passenger side. Its only started in the last few months. My mechanic has checked all engine and body mounts but all are good. Anyone else had this problem or have any ideas? Theres 120 000 kms on the clock.