Hyundai i30 Lambda Sensor Replacement Parts

Lambda sensors exist on petrol-engined i30s and also on diesel variants as pre-cat or post-cat sensors used to monitor exhaust gases and control fuelling — so the part is genuine across the range, but the exact sensor type, position, and connector differ between petrol and diesel engines and between emissions eras. On petrol cars you typically have an upstream (pre-cat) sensor and a downstream (post-cat) sensor, whereas diesel applications are more limited in scope. Always confirm whether you need the upstream or downstream sensor when requesting a quote from a breaker.

The first-generation i30 (Mk1, 2007–2012) and second-generation i30 (Mk2, 2012–2017) are substantially different cars with different engine families and exhaust configurations, and sensors from one generation will very rarely cross over to the other. The emissions era also shifted across this boundary — Euro 5 requirements tightened around 2011 — meaning connector types, thread sizes, and calibration can all differ. Confirm fitment against your exact registration and engine code with the breaker before ordering.

Trim level does not affect lambda sensor fitment on the i30 — the sensor is determined by the engine code, fuel type, and emissions standard, not by whether the car is a Classic, Active, Style, Premium, or Nav grade. You should expect that a sensor pulled from a lower-spec car will be mechanically identical to one from a higher-spec car provided the engine code matches. Focus your search on the engine code and model year rather than the trim name.

The Mk2 i30 received a facelift around 2015, but whether this affected the lambda sensor depends on whether the engine or its emissions tune changed at the same time — for many carry-over engines the sensor remained the same, but for any engine that was updated to meet Euro 6 standards the sensor specification can differ. This is strong confirm-with-breaker territory: name the boundary year (2015 facelift) to the breaker and ask them to check against your specific engine code and registration. Do not assume a pre-facelift sensor is a direct swap without that check.

Diesel engines generally do not use a traditional lambda (oxygen) sensor in the same way as petrol engines, and later Euro 5 and Euro 6 diesel i30s are more likely to use NOx sensors or exhaust gas temperature sensors as part of their emissions management rather than a wideband lambda sensor. If you have been quoted for a lambda sensor on a diesel i30, it is worth confirming with the breaker exactly which sensor in the exhaust system is faulty, as the terminology is sometimes used loosely. Matching the correct sensor type, position, and connector to your engine code will save time and avoid a wasted purchase.

Even within the same generation and year, the 1.4 and 1.6 petrol engines are different engine codes and may use different sensor specifications, connector types, or thread pitches, so this is not a straightforward swap. The safest approach is to supply the breaker with your full engine code — found on the engine block or via a VIN check — rather than relying on engine size alone. A reputable breaker will cross-reference the part against your specific code before confirming availability.