Product Overview
This pre-catalytic converter oxygen sensor (O2 sensor / lambda sensor) is engineered for Mercedes-Benz vehicles with the M271 1.8L supercharged/turbocharged CGI engine. Positioned upstream of the catalytic converter, it provides continuous feedback to the engine control unit for precise fuel injection control, optimizing both performance and emissions.
Key Features
- Wide-band planar zirconia sensing element
- Fast light-off time for cold-start emissions reduction
- Double-walled stainless steel protection tube
- Water-resistant connector with O-ring seal
- Pre-coated anti-seize compound on threads
Compatible Vehicles
Mercedes C-Class W204 (2007-2014, C180/C200/C250 CGI)
Mercedes E-Class W212 (2009-2016, E200/E250 CGI)
Mercedes GLK-Class X204 (2008-2015, GLK200/GLK250 CGI)
Mercedes SLK-Class R172 (2011-2016, SLK200 CGI)
Technical Specifications
| Sensing Technology | Planar Wide-Band ZrO2 |
| Heater Resistance | 2.5 - 4.5 Ohms @ 20°C |
| Response Time | <300ms (lean-to-rich) |
| Thread Size | M18 x 1.5 |
| Warranty | 12 months |
Installation Notes
Always install with the sensor at room temperature. Do not touch the sensing element. Apply anti-seize compound to threads if not pre-coated. Torque to 45-55 Nm. Clear ECM fault codes after installation and perform a readiness drive cycle.