Two problems related to wiper have been reported for the 2014 Lexus IS350. The most recently reported issues are listed below.
When it's raining ,I turn on the wiper at slow speed it's working normal for about 2 min then it's will stop working . I have to switch it on high speed only. I almost got in to accident that day . It's happen more often now and then . I did brought the car to dealer they said can't duplicate the problem.
While driving in the rain my windshield wipers suddenly stopped working. The wipers 'froze' in the up position. I had to work the wiper control inside the car 6-10 times to get the wipers to work again. After a few minutes of driving the wipers stopped working again. The wipers only worked intermittently and only if I kept working the switch. I took the vehicle to the local Lexus dealership and the vehicle was diagnosed as having "wiper relays shorting" causing the wipers not to work.