I have a similar problem. A loud and sonorous low-pitched buzzing that sounds and feels as if its coming from the chassis, which gets slightly quieter as the engine warms up, but at speed rises in frequency to a high-pitched whirring noise. I originally thought it was the EGR but am now...

Diagnosis needed please: 2002 TD5 Discovery with c. 82K on the clock and power upgrade by last (first) owner, very quick and economical but irritatingly noisy with accompanying engine vibration. Noise a bit like an ancillary bearing, but doesn't have that grinding edge to it, more of a deep...

EGR Diagnosis needed: TD5 Discovery with power upgrade and (supposedly) 82K. Very fast and economical but there's an irritating mid-pitched noise and vibration from the engine that feels like something loose or spinning on its own, possibly an ancillary bearing, and a tendency for the revs...