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How to Replace the Upstream Oxygen Sensor on the Dacia Sandero 2

Model: Dacia Sandero - Years: 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
Part: Oxygen sensor

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Video tutorial

To replace the upstream oxygen sensor (lambda sensor) on the Dacia Sandero 2, you will need a special 22 mm lambda sensor socket (with a cutout for the wire), a universal joint, an extension, penetrating fluid (WD-40), a torque wrench, and silicone-free anti-seize grease.

Typical symptoms of a faulty sensor include increased fuel consumption, irregular idle, hesitation during acceleration, and the engine light with codes P0130, P0133, or P0135. Using an OBD scanner, you can check that the voltage does not fluctuate between 0.1V and 0.9V (if it remains fixed, the sensor is faulty).

You can find the new sensor on eBay with code 398333371228 for £39.64, with free delivery. Disconnect the battery, allow the engine to cool, locate the sensor on the exhaust manifold (before the catalytic converter), spray penetrating fluid on the threads, disconnect the connector, and unscrew the sensor counterclockwise with the special socket.

Clean the threads, apply a thin layer of anti-seize on the new sensor, screw it in by hand and tighten to about 30 Nm. Reconnect the connector, the battery, clear the error codes, and take a test drive for 20 minutes. If the light remains on after replacement, do not replace sensors randomly: it could be a broken ground wire at the connector or a degraded catalytic converter, requiring further diagnosis.


Posted on 14 November 2026 by ScegliAuto


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