HELLAO2 SensorArt. 6PA 358 229-091£37.99
Also known as: O2 Sensor, Oxygen Sensor, Lambda Probe
OEM & aftermarket lambda sensor from top brands — compare prices, check fitment, order with free delivery
Shop 9578 lambda sensor from 24 trusted brands including BOSCH, NTK, DELPHI. Compare prices, check vehicle compatibility, and get free delivery on orders over £99.
Lambda sensors (oxygen sensors) monitor exhaust gas composition and feed data to the engine management system. Pre-cat sensors adjust the air-fuel mixture for efficiency, while post-cat sensors verify catalytic converter performance. Faulty sensors trigger diagnostic codes like P0130 and P0136, increase emissions, and reduce fuel economy. At CarParts247 we stock lambda sensors from Bosch, NGK, and Denso for precise fitment.
Pre-cat (upstream) sensors sit before the catalytic converter and actively control fuelling. Post-cat (downstream) sensors monitor converter efficiency. Both types can fail but cause different symptoms.
Direct-fit sensors are plug-and-play with the correct connector and thread. Universal sensors require splicing the wiring harness — they cost less but need careful installation.
Commonly searched OE numbers fitting Lambda Sensor from the TecDoc catalogue.
Common original equipment numbers linked to stocked alternatives.
