Need an O2 sensor for your vehicle? This is a UK CITY brand oxygen sensor, part number PTB-18.10. It's brand new in its packaging with the latest date code, meaning it's fresh stock and hasn't been sitting on a shelf for years. Made in the United Kingdom. Oxygen sensors are crucial for your engine's fuel management and emissions – a bad one can cause poor gas mileage, rough idle, or failed inspections. Before you buy, you MUST confirm that this exact part number (PTB-18.10) is the correct one for your specific car's make, model, and engine. If it is, this is a straightforward replacement that can solve a bunch of running issues. A quality part for a common repair. Get your engine running efficiently again.