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4L4 Audi Q3 Quattro 2015–2018 2
reducing deflection and improving suspension articulation for better handling and tire contact
Make Model Years Engine Audi S5 2009–2012 4
5L5 Volkswagen Jetta 2005–2007 2
VW Oxygen Sensor – Downstream – Bosch 18179 zf 4L4 Audi Q3 Quattro 2015–2018The Bosch 18179 downstream oxygen sensor is a direct fit replacement for 20162018 Volkswagen Jetta models with the 1. 4L TSI engine. It monitors catalytic converter efficiency and helps maintain proper air fuel ratios. Bosch's OE design ensures easy installation and reliable long term performance. Key Features & Benefits Downstream Position: Installs after the catalytic converter for emission monitoring. Specific Fitment: Designed for VW Jetta 1. 4L