This happened to mine. My local dealer (who I recommend without hesitation) told me it was a common problem, usually caused by a home-recorded cd jamming the mechanism. They told me it would be £1750 plus VAT plus fitting to replace but suggested I should look around for a specialist. I found one who offered to examine the unit but was not prepared to remove it so I went back to Lexus and was told it was a 30 minute job to remove it and would be around £50. I booked an appointment but in the meantime continued using the car, just using the radio and a "remote transmitter" from an MP3 player when Jeremy Vine starts to get on my nerves. Travelling back from London and prior to a roundabout on a dual carriageway part of the A303 just before the Exeter and Taunton roads separate, they have recently laid rumble strips that are both high and wide across both carriageways in order to bring speed down from 70 mph (which is about what I was doing) to a reasonable level to traverse the roundabout safely. The strips shook the car more violently than I have previously experienced and certainly slowed me down! About five miles further on, I stopped for petrol and when I turned the engine (and sound unit) back on a cd was spontaneously ejected from the player! I pressed the eject button five more times and all the remaining ones were ejected. On close examination, one of the cds had a slightly distorted edge and a number of marks that could have been caused by a jammed mechanism. I haven't quite had the courage to reload another 6 cds to see if it has fully fixed itself but before I do I will examine each one very closely and only use pre-recorded ones.
I hope this helps.
