MG3SW MGTF Front Oxygen Sensor

Yes, this front oxygen sensor is compatible with MG 3 models from 2011 to 2026, so your 2018 MG 3 is fully supported. The sensor is engineered as a direct replacement with no modifications required, and it connects to your existing wiring harness and sensor connectors.

Both the MG3SW and MGTF variants are front oxygen sensors designed for MG 3 and MG 3SW models within the 2011–2026 range. The SKU variants ensure fitment specificity for your exact model — select MG3SW if you own an MG 3SW, or MGTF if you own an MGTF. Both deliver the same OEM-quality performance and direct bolt-on installation.

Installation typically takes 30–60 minutes for a DIYer with basic mechanical experience. You'll need an oxygen sensor socket or wrench to remove and install the sensor, plus a standard socket set to disconnect the battery. The process involves disconnecting the battery, unplugging the old sensor's electrical connector, unbolting the old sensor, and threading in the new one — no drilling or welding is required.

This sensor is constructed with high-temperature ceramic elements and stainless steel, engineered to withstand the harsh conditions inside your exhaust system. These materials are designed to provide extended service life and reliable air-fuel ratio monitoring even under extreme heat and oxidative stress.

Your package includes one front oxygen sensor, one gasket seal, and installation hardware. The gasket seal helps ensure a proper fit at the mounting location, and all components are ready for immediate installation.

Yes — this OEM-quality sensor optimizes combustion efficiency by providing precise air-fuel ratio monitoring to your engine management system. By ensuring accurate oxygen readings, it helps reduce fuel consumption and lower emissions, contributing to better overall fuel economy.

Yes, you should disconnect the negative battery terminal and wait 5 minutes before beginning installation to ensure all electrical systems are fully discharged. This is a critical safety step that prevents electrical damage and allows you to safely work with the sensor connector and exhaust components.

Use the vehicle selector at the top of this page to confirm fitment for your specific year, brand, and model. If your vehicle is not listed or you're unsure, contact us at support@evparts4x4.com with your VIN — we'll confirm compatibility within 24 hours. Our Guaranteed Fit policy means if a compatibility issue is on our end, we'll make it right.

Orders are processed and dispatched within 2-4 business days. Standard parts ship via Air Parcel and typically arrive in 10-15 business days; larger body parts ship via Sea Freight and take around 30-45 business days. Shipping is free on orders over $100. You'll receive a tracking number once your order ships, and can track it anytime here. Full details in our Shipping Policy.

Yes — we offer a 30-day return window from the delivery date, and we don't charge any restocking fees. If an item arrives damaged or isn't quite right on our end, we'll arrange a replacement or full refund and cover the return shipping. For the complete terms, please see our Return & Refund Policy or start a return via our RMA page.

We don't provide installation directly, but most of our parts are designed for straightforward DIY installation — the step-by-step guide is in the Installation Guide tab above. For complex parts (e.g. brakes, suspension, electrical systems), we recommend having a qualified mechanic perform the installation. If you have technical questions during installation, our support team is happy to help at support@evparts4x4.com.