Hyundai i40 Lambda Sensor Replacement Parts

Yes, but only on petrol-engined i40s – the 1.6 GDi and 2.0 GDi variants use lambda (oxygen) sensors as part of their engine management and emissions systems. The i40 1.7 CRDi diesel does not use a traditional lambda sensor; diesels manage fuelling differently and instead rely on other sensors such as a NOx or exhaust gas temperature sensor. If you drive a diesel i40 and are chasing an emissions or fuelling fault, confirm with the breaker exactly which sensor you need against your registration.

The Hyundai i40 was sold in the UK as a single generation, running from 2011 to 2019, with a facelift introduced in 2015. For lambda sensors, the key fitment variables are the engine code and the emissions standard the car was built to – Euro 5 applied to earlier cars and Euro 6 to later ones, and sensors calibrated for one emissions era may not perform correctly or pass MOT in the other. Always quote your registration and engine code to the breaker so they can match the correct sensor.

If the engine code is identical and both cars fall within the same emissions era, there is a reasonable chance the sensor will interchange, but the facelift period coincides with the Euro 5 to Euro 6 transition boundary, which can mean changes to sensor specification even on the same engine family. Fitting a sensor from the wrong emissions era may cause management light faults or an MOT failure. Route this specific cross-boundary question to the breaker and give them both registrations so they can verify the part numbers match before you buy.

No – trim level has no bearing on lambda sensor fitment for the i40. Classic, Style, Premium, and SE trims all share the same engine variants, so what matters is the engine code and emissions standard, not the badge on the tailgate. You may find other differences between cars stripped from different trim levels (interior, equipment), but the lambda sensor itself is determined purely by drivetrain specification.

The i40 was sold in the UK in both saloon and tourer (estate) body styles, but the lambda sensor is part of the engine and exhaust management system, not the body, so body style does not affect which sensor is required. Both body styles shared the same petrol engine options, so the engine code and emissions era are the only fitment variables you need to focus on. Confirm your engine code with the breaker to ensure the correct sensor is sourced.

It is possible that sensors from other Hyundai models sharing the same engine code – for example, certain Sonata or ix35 variants – may use the same lambda sensor, as Hyundai has used engines across multiple platforms. However, exhaust routing, sensor position, and emissions-era calibration can all differ between models even with the same base engine, so cross-model fitment is genuinely uncertain territory. Give the breaker your i40's registration and engine code and ask them to match by part number rather than assuming another model's sensor will work.