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

Based on OEM Hyundai/Kia EPC listings and verified aftermarket SCR catalog data, part number 29650-2U700 (SNS0843B) is used in Hyundai/Kia Euro 6 diesel SCR (AdBlue) systems, mainly on 1.6 CRDi diesel compact SUV platforms (Kia Seltos / Hyundai Kona / KX3 depending on market and emission calibration).

Confirmed applications include:

• Kia Seltos 1.6 CRDi Euro 6 SCR (2019–present diesel variants)
• Hyundai Kona (OS) 1.6 CRDi SCR diesel variants
• Hyundai KX3 / ix25 1.6 CRDi SCR diesel variants (regional markets)
• Hyundai/Kia shared 1.6 CRDi SCR architecture

Fitment is strictly based on OE number matching:
29650-2U700 / SNS0843B

Verified Cross-Reference (Important)

• OEM aftermarket listings confirm 29650-2U700 = SNS0843B NOx sensor used on Hyundai/Kia Seltos / Kona 1.6 CRDi SCR diesel systems
• Cross-reference listings confirm direct fitment as 296502U700 / SNS0843B SCR NOx sensor assembly for Hyundai/Kia compact diesel platforms
• Same SCR family aligns with Hyundai/Kia 1.6 CRDi Euro 6 emission system architecture (U-series NOx sensor platform)

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 SNS0843B module is typically used in 1.6 CRDi SCR systems, often mounted either upstream or downstream of the SCR catalyst depending on vehicle configuration.

Symptoms / Fault Codes

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

OE / Part Numbers

• 29650-2U700
• SNS0843B
• 296502U700 (catalog format variant)
• Hyundai/Kia 1.6 CRDi SCR NOx sensor family

FAQ

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

No. Even though it belongs to the same SCR system family, Hyundai/Kia uses ECU-coded variants. 2U700 (SNS0843B) is not interchangeable with 2U200 / 2U220 / 2U600 series sensors.

Why do Seltos and Kona 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 SNS0843B calibration matches, otherwise SCR faults or limp mode may occur.