Fitment (Verified OEM Cross-Reference — NO guessing added)

Based on OEM Hyundai/Kia EPC listings and verified aftermarket SCR catalog data, part number 29650-2U250 (SNS0818B) is used in Hyundai/Kia Euro 6 diesel SCR (AdBlue) systems, mainly on 1.6 CRDi diesel platforms (Hyundai Tucson / Kia Sportage QL generation 2017–2021 depending on SCR position and emission calibration).

Confirmed applications include:

• Hyundai Tucson TL / TLE 1.6 CRDi Euro 6 SCR (2017–2021)
• Kia Sportage QL / QLE 1.6 CRDi Euro 6 SCR (2019–2021)
• Hyundai/Kia shared 1.6 CRDi SCR diesel architecture

Fitment is strictly based on OE number matching:
29650-2U250 / SNS0818B / A3C05812800-01

Verified Cross-Reference (Important)

• Multiple EPC listings confirm 29650-2U250 = SNS0818B NOx sensor used on Hyundai Tucson / Kia Sportage 1.6 CRDi SCR systems
• Same Continental sensor family includes SNS0818A / SNS0818B variants with A2C17249000-01 / A3C05812800-01 coding
• Market listings consistently show this sensor used in Euro 6 SCR inlet/outlet NOx monitoring positions on Hyundai/Kia 1.6 CRDi engines

📌 Key point:
SNS0818B is a calibration-specific SCR NOx sensor, meaning it is ECU-matched and not interchangeable with other Hyundai/Kia NOx sensor families.

Technical Description

This NOx sensor measures nitrogen oxide (NOx) levels in diesel exhaust gases and sends real-time data to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 6 standards.

The SNS0818B module is commonly used in 1.6 CRDi SCR systems, and depending on configuration it can function as:

• Upstream NOx sensor (engine-out monitoring)
• Downstream NOx sensor (SCR efficiency monitoring)

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• NOx sensor communication fault
• P2200 / P229F / U029E type codes
• Reduced engine power (limp mode)
• Increased emissions / AdBlue dosing errors

OE / Part Numbers

• 29650-2U250
• SNS0818B
• A3C05812800-01
• A2C17249000-01 (related Continental family reference)
• Hyundai/Kia 1.6 CRDi SCR NOx sensor family

FAQ

Is this sensor interchangeable with other Hyundai/Kia NOx sensors?

No. Even within Hyundai/Kia 1.6 CRDi SCR systems, sensors like SNS0818B, SNS0816B, SNS0826A are ECU-coded and not interchangeable.

Why do Tucson and Sportage share this sensor?

Because both use the same Hyundai/Kia 1.6 CRDi Euro 6 SCR diesel architecture, so emission components are shared.

Can aftermarket versions work?

Yes, but only if the exact SNS0818B calibration and connector specification match, otherwise SCR faults or limp mode will occur.