Help Center
Frequently Asked Questions
Everything you need to know about NOXWX — diagnostics, ordering, shipping, returns, and technical questions about emissions parts.
Common symptoms include loss of power, increased fuel consumption, the DPF warning light on your dashboard, frequent regeneration cycles, and unusual exhaust smoke. If you notice any combination of these, have it diagnosed professionally before replacement.
A failing NOx sensor typically causes reduced engine power (limp mode), increased AdBlue consumption, higher emissions, and diagnostic trouble codes P2200-P2299. The vehicle may enter reduced power mode until repaired.
OEM (Original Equipment Manufacturer) parts are made by the vehicle's original supplier and match exact factory specs. Aftermarket parts are made by third parties — quality varies. NOXWX carries both, with full quality data on each listing. OEM is typically 30-50% more expensive.
Yes — we ship to all 27 EU countries plus the UK, Norway, and Switzerland. Delivery is 2-5 business days within the EU. Belgium orders placed before 14:00 ship same-day.
14-day return window from delivery date for unused parts in original packaging. Electrical parts (sensors, injectors) are non-returnable once installed. See our Returns page for the full process.
OEM parts carry the manufacturer's warranty (typically 2 years). Aftermarket parts from NOXWX carry our own 1-year warranty against defects. DPF filters have extended 2-year coverage when fitted by a certified installer.
Use the Vehicle Selector on our homepage — choose Make → Model → Engine Code → Product Category. Or contact us via WhatsApp with your VIN number and we'll recommend the exact part.
We accept credit/debit cards (Visa, Mastercard, Amex) and SEPA bank transfer. Additional payment methods may become available as we expand our payment integrations. All transactions are 3D-Secure protected. For B2B customers, we also offer invoice-based payment with approved terms.
Yes — all prices shown include 21% Belgian VAT. For B2B customers with a valid EU VAT number (validated via VIES), we can issue reverse-charged invoices with 0% VAT at checkout.
Send us your old DPF or turbo, and we ship you a refurbished unit at 40-60% off the new price. Your old core goes through our cleaning and quality process before being resold. See the Exchange Service page for full details.