To estimate the price of the 2019 BMW X4 I4 2.0L Twin Power Turbo with 146000 km mileage, I analyzed the listed prices of similar cars. The closest match is a 2019 BMW X4 with the same engine and mileage listed for SAR 148000. Another similar car with slightly lower mileage (129000 km) is listed for SAR 155000. A 2019 model with a different engine (I6 3.0L) and 116000 km is listed for SAR 148500. Considering the higher mileage of the target car, I adjusted the price downwards. The average of these listings is around SAR 150000, but given the higher mileage, a reasonable estimate would be slightly lower.