Where Is the NOx Sensor on a Mercedes GLA 200d? 2018 Location Tutorial

In this video I show the NOx sensor location on a 2018 Mercedes GLA 200d (X156) equipped with the OM651 diesel engine. If your car has an AdBlue warning, reduced power, or fault codes such as P2202 / P2200 / P229F, the NOx sensor may be faulty. This guide clearly shows where the sensor is mounted and how to visually access it. This applies to Mercedes GLA 200d / 220d models from 2015–2020 with OM651 engines. ⸻ WHAT’S INCLUDED: • NOx sensor location on the exhaust system • Upstream vs downstream NOx sensor explanation • Accessing the wiring connector • Basic removal overview (for reference only — no coding shown) • Common signs of a faulty NOx sensor ⸻ TOOLS RECOMMENDED (): • Basic socket and spanner set • Penetrating spray • Gloves • Torch or work light ⸻ HEALTH & SAFETY TIPS WHEN WORKING ON CARS: • Always allow the exhaust system to cool completely • Wear gloves and eye protection • Support the vehicle safely if raising it off the ground • Avoid touching hot exhaust components • Disconnect the battery if unplugging sensors • Work in a well-ventilated area ⸻ AFFILIATE & RESPONSIBILITY DISCLAIMER: Some links in this description may be Amazon affiliate links, meaning I may earn a small commission at no extra cost to you. Any work you carry out on your vehicle is entirely at your own risk. I accept no responsibility for injury, vehicle damage, or incorrect repairs. Always follow official Mercedes repair procedures. ⸻ 🔖 Hashtags #mercedes #gla200d #mercedesgla #noxsensor #diesel #adblue #carrepair #maintenance #mechanic #diycars