Mercedes Sprinter Upstream Oxygen Sensor – Bosch OEM | OM647 / Early OM642 | #0035427118 (2004–2009)

DESCRIPTION:

A failing upstream oxygen sensor causes your Sprinter's ECU to lose real-time feedback on exhaust gas composition — leading to rough running, poor fuel economy, increased emissions, and persistent check engine lights. This is the genuine Bosch OEM upstream (pre-catalyst) oxygen sensor for T1N Sprinters with the OM647 and early NCV3 Sprinters with the OM642 3.0L V6. It's a 5-wire wideband sensor with an 800mm wire length, designed for multiple upstream positions on these engine families.

What This Part Does

The upstream oxygen sensor monitors the oxygen content of exhaust gases before the catalytic converter, giving the ECU precise air-fuel ratio data for combustion management. On diesel Sprinters, this sensor plays a key role in emissions control and fuel trim optimization. A failed or drifting sensor causes the ECU to lose accurate exhaust data — resulting in fault codes, reduced fuel efficiency, and emissions system performance issues.

Common Symptoms of a Failing O2 Sensor

• Check engine light with oxygen sensor or lambda fault codes
• Increased fuel consumption
• Rough idle or hesitation
• Failed emissions test

Critical Fitment Warning — Not for 2010+ BlueTec Sprinters

This sensor (0035427118) is for 2004–2009 T1N and early NCV3 Sprinters only. It does not fit 2010+ BlueTec NCV3 Sprinters — those require a different sensor (part #0065424918). Always verify your model year and engine code before ordering.

Sensor Specifications

• Type: Upstream (pre-catalyst), 5-wire wideband
• Wire length: 800mm

Fitment

• 2004–2006 Dodge/Freightliner Sprinter 2500/3500 – 2.7L L5 Diesel (OM647)
• 2007–2009 Dodge Sprinter 2500/3500 – 3.0L V6 Diesel (OM642)
• 2007–2009 Freightliner Sprinter 2500/3500 – 3.0L V6 Diesel (OM642)

Always verify your VIN before ordering. Contact us and we'll confirm fitment before you buy.

Part Numbers

• Mercedes OEM: 0035427118 / A0035427118 / 003-542-71-18
• Bosch: 17019 / 0281004060
• Pierburg: 7.05270.22.0
• Cross Reference: 234-5091, 5135667AA