Hi all. This is a 2017 leaf Tekna 30kWhr. Tyre Pressure Monitoring system warning light came on, flashing first, then steady, with no message on dash. Instruction book says it can be reset, which I did, but no effect. At service the dealer said the sensor had come adrift inside the tyre, and fitted a new one at £159+VAT. This was in a wheel for which the whole wheel and tyre had been replaced 3500 miles ago so the valve and sensor were either new or refitted from the wheel which was replaced (pothole damage). The new wheel and tyre show no sign of any damage. I challenged the dealer on the basis that a sensor, if fitted properly, should not detach itself, and that the fault was either poor workmanship or a faulty part. Dealer says that Nissan won't replace the part because I have probably hit a big bump which will have dislodged the sensor. I think that's rubbish - if there's no other damage to the car, this part should not just fall off. Any one else experience this?