This morning got in the LX470 and the ABS brake alarm went off for about 2 mins with lights on the dash. I just had to move the car to a different parking spot so I drove it around the block very carefully. I kept checking the brakes but never lost pressure. Well then the alarm and lights just went off. Everything functioned as normal. I turned the car off waited a few minutes then turned it on again, no alarm this time. It's got 287K miles on it so it's plenty broke in. Time for new master cylinder or something else I should be checking?