Hyundai i30 Oxygen Sensor Replacement Parts

Oxygen sensors exist on all petrol-engined i30s, as they are a fundamental part of the closed-loop fuelling system on any petrol engine. Diesel i30s do not use a conventional lambda/oxygen sensor in the same way — diesels manage fuelling differently and instead use sensors such as NOx or exhaust temperature sensors rather than a wideband or narrowband oxygen sensor. If you have a diesel i30 and are searching for an oxygen sensor, it is worth double-checking with your breaker what you actually need, as the part description can vary.

The Mk1 i30 ran from 2007 to 2012, with a facelift arriving around 2010, but the core petrol engine codes carried across that facelift, which means the oxygen sensor is generally associated with the engine rather than the body revision. That said, connector types and sensor positions can differ even within the same generation depending on exact build date and specification, so you should confirm with the breaker by quoting your registration rather than assuming a pre-facelift donor car is a guaranteed match. Never rely on visual similarity alone.

The Mk2 i30 ran from 2012 to 2017 and the Mk3 from 2017 onwards, and these are distinct platforms with different engine generations, so crossing that boundary is a real fitment risk. Euro 6 emissions rules tightened from around 2015 onwards, meaning the later Mk2 and all Mk3 petrol engines were calibrated and sensored to a different emissions standard than earlier Mk2 cars. You must confirm with the breaker against your exact registration, as fitting a sensor from the wrong emissions era could cause running problems or an MOT failure.

Trim level does not affect which oxygen sensor is fitted — the sensor is determined by the engine code and emissions specification, not whether the car is a Classic, SE, Sport, or Premium. A used sensor pulled from a basic-spec donor car with the same engine code and emissions era is the same part as one from a top-specification Premium model. When sourcing from a breaker, quote your registration and engine code rather than your trim name.

Petrol i30s typically have at least two oxygen sensors: one upstream of the catalytic converter (the pre-cat or front sensor, which controls fuelling) and one downstream (the post-cat or rear sensor, which monitors catalyst efficiency). These are not interchangeable with each other, and on some engine variants there may be additional sensors depending on the configuration. When contacting a breaker, specify whether you need the NS or OS bank if applicable, and whether it is the pre-cat or post-cat position, as well as your engine code.

Hyundai and Kia shared platforms and engine families across the i30 and Cee'd, and in some cases the oxygen sensors are shared components, but this is strong confirm-with-breaker territory rather than something to assume. Engine codes, connector types, and sensor calibration need to match precisely, and a sensor that physically fits may not function correctly if it is calibrated differently. Give the breaker both registrations and let them cross-reference the part numbers before committing to a purchase.