Alfa Romeo Giulia Oxygen Sensor Replacement Parts

Yes, all petrol-engined Alfa Romeo Giulias are fitted with oxygen (lambda) sensors, which sit in the exhaust system to help the ECU manage fuel mixture and emissions. The Giulia range launched in the UK in 2016 and all petrol variants — including the 2.0-litre turbocharged four-cylinder and the 2.9-litre V6 in the Quadrifoglio — use them. Diesel Giulias use NOx sensors and a different emissions management setup rather than traditional wideband lambda sensors, so if your car is a diesel, confirm with the breaker exactly which sensor you need against your registration.

The Alfa Romeo Giulia has been produced as a single generation since its 2016 UK launch, with a mid-cycle refresh around 2020 that brought cosmetic and infotainment updates but no fundamental engine changes to the core 2.0-litre petrol unit. Because fitment of an oxygen sensor follows the engine code rather than the model year, a sensor from the same engine code should in principle carry across, but the 2020 refresh year sits right on a potential specification boundary so you should confirm with the breaker using both registrations before buying.

Trim level makes no difference to oxygen sensor fitment on the Giulia — the sensor is determined by the engine code and emissions specification, not by whether the car is a Sprint, Super, Veloce, or Ti. The Quadrifoglio is the exception to check separately because it uses the 2.9-litre twin-turbo V6, which has a different exhaust configuration and different sensor positions to the 2.0-litre four-cylinder fitted to all other trims. Always match by engine code rather than trim name, and confirm with the breaker against your registration.

On the 2.0-litre petrol Giulia there are typically pre-cat and post-cat lambda sensors — at minimum one upstream of the catalytic converter and one downstream — giving at least two sensors, though the exact count can vary with emissions standard. The Quadrifoglio's V6 has a more complex exhaust layout with multiple banks, so the number and positions differ. Tell the breaker which sensor position you need (upstream or downstream, and NS or OS bank on the V6) as well as your engine code, so they can pull the correct unit.

If the engine code on the 2016 donor car matches your 2019 2.0-litre petrol exactly, there is a reasonable chance of compatibility, as the core 2.0-litre turbo unit ran largely unchanged across those years. However, subtle emissions calibration differences between Euro 6 variants can mean a sensor from a different specification year affects how your ECU reads exhaust gases, and a mismatched sensor can cause a failed MOT emissions test. Confirm the engine code and Euro 6 sub-variant with the breaker against both registrations before committing to the purchase.

No — diesel and petrol Giulias use entirely different exhaust sensor technologies and they are not interchangeable. Petrol variants use lambda (oxygen) sensors to manage air-fuel ratio, while diesel variants rely on NOx sensors and exhaust temperature sensors as part of their SCR and DPF systems. Make sure the breaker you contact knows you need a petrol lambda sensor, and give them your exact engine code and registration to avoid being sent the wrong part.