Cheap Hyundai Ioniq Oxygen Sensor

It depends on the variant. The Ioniq Hybrid and Ioniq Plug-in Hybrid both use a 1.6-litre GDi petrol engine and do have an oxygen (lambda) sensor as part of their exhaust and emissions system. The Ioniq Electric has no combustion engine whatsoever, so it has no exhaust system and no oxygen sensor — if you drive the electric version, this is not a part you will ever need.

The Hyundai Ioniq ran from 2016 to 2022 in its first generation, with a facelift arriving for the 2019 model year. Both the pre-facelift (2016–2018) and post-facelift (2019–2022) Hybrid use the same 1.6 GDi engine code, which is the key factor for sensor compatibility. That said, emissions calibration or connector changes across that 2019 boundary are worth checking, so confirm with the breaker that the sensor from the earlier car matches your registration before buying.

No, trim level makes no difference here. All Ioniq Hybrid and Plug-in Hybrid models share the same 1.6 GDi engine regardless of whether the car is a base S or a top-spec Premium SE, so the oxygen sensor is the same across the range. You may find minor cosmetic differences on a part pulled from a different trim car, but the sensor itself is a purely functional emissions component and trim has no bearing on it.

Both models use the same 1.6 GDi petrol engine, so the sensor may well be compatible, but the Plug-in Hybrid's engine management and emissions calibration can differ slightly from the standard Hybrid's setup. Because these nuances sit close to catalytic converter and emissions system territory, confirm with the breaker that the specific sensor — including its position (upstream or downstream) and wiring connector — matches your car's registration before committing to a purchase.

Yes, this matters significantly. The upstream sensor sits before the catalytic converter and monitors the air-fuel mixture, while the downstream sensor sits after it and checks converter efficiency; they are not interchangeable. When contacting a breaker, specify which position you need and confirm your engine code so they pull the correct unit from the right location on the donor car.

A faulty oxygen sensor can cause poor fuelling and elevated emissions, which is a common MOT failure route on petrol-hybrid vehicles like the Ioniq. A good-quality used sensor from a low-mileage breaker car with the correct engine code is a legitimate option, but make sure the breaker can confirm the donor vehicle's emissions standard matches yours, particularly if your car is a later Euro 6 example. Have the sensor fitted and the engine management light cleared by a competent garage before your retest, as stored fault codes alone can cause an MOT failure on post-2018 vehicles.