Peace be upon you. Oxygen sensor below or pollution canister sensor, environment canister sensor. If you have a carbon smell, the engine light is on, or increased fuel consumption, one of the sensors (upper or lower) might be faulty. Both are available in limited quantities. Fits Mazda 6 / CX5 From 2014 to 2024. Price: 200 SAR. Al-Ahsa for hand-to-hand delivery and shipping to all over the Kingdom.