Rather unnervingly, this morning the steering on my 2004 Lexus RX300 temporarily failed twice. From cold, 100 yards into my journey there is a left downhill bend and the steering did not work for a second or two, then on the next right which is quite sharp it wanted to go straight on and needed a fair bit of fighting/coaxing to get it round. Both bends are slow, about 5-10 mph max. After that it seemed fine although there were no more sharp turns. There have been hints of this problem before but not like today. Have you heard of this before and what would you do please?