These things are starting to get on my nerves. 2 replaced under warranty and now the 2 outta my pocket. Got the P0155 code for the heater part of the sensor and this time I'm going with a NGK sensor. Anybody else decide to take the other road? I know the Denso is cheaper right now but I wonder if they all have the flawed heater circuit. Everyone that failed was a Denso with a heater circuit open.