To estimate the price of the 2017 Nissan Sentra S I4 1.6L with 171400 km in bad condition, I considered several data points. The closest match is a 2017 Sentra 1.6L S with 140000 km, which had an offer accepted at AED 25000 on 2024-01-04. However, the car in question has higher mileage and is in worse condition. The selling prices of 2016 Sentra 1.8L S models with similar or higher mileage and average condition range from AED 13000 to AED 26049, with the lower end being more relevant due to the worse condition and higher mileage of the target car. Considering these factors, I adjusted the price downwards from the accepted offer to account for the additional wear and tear.