GM Genuine 12662659 NOx Sensor Position 2 Downstream 2014-2015 Cruze 2.0L Diesel

Item Description

GM Genuine Parts 12662659 — Nitrogen Oxide (NOx) Sensor, Position 2

Genuine GM OEM nitrogen oxide sensor assembly, GM part number 12662659. This is a GM Genuine Parts component — the same part GM specifies as the factory replacement for the original equipment sensor, not an aftermarket copy.

Position 2 — What That Means

Position 2 is the DOWNSTREAM (rear) sensor. It sits after the selective catalytic reduction (SCR) catalyst and measures the NOx level leaving the aftertreatment system, which the ECM uses to confirm the SCR is working and to trim diesel exhaust fluid (DEF) dosing. It is not the upstream/inlet sensor (Position 1), which sits ahead of the SCR. Ordering the wrong position is the most common mistake on this part — please confirm which sensor your fault code points to before buying.

Vehicle Fitment

• 2014–2015 Chevrolet Cruze, 2.0L turbo-diesel (LT / LTZ 4-door sedan)

This part is engine-specific to the 2.0L diesel Cruze. It does not fit the gasoline Cruze, and it is not the Duramax truck NOx sensor. Please verify your part number against the sensor you are replacing before purchase.

Part Numbers

• GM part number: 12662659
• Supersedes / replaces: 12641557
• Also referred to as: rear NOx sensor, downstream NOx sensor, Sensor Assembly — Nitrogen Oxide Position 2

Key Features

• Detects the nitrogen oxide content of the exhaust to optimize emissions and fuel economy
• GM-recommended replacement for your GM vehicle's original factory component
• Offers the quality, reliability and durability of GM OE
• Complete assembly: sensor probe, wiring harness and control module on its mounting bracket

Important Installation Note

Per GM: this part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle. Plan on a scan tool capable of performing the NOx sensor relearn/reset after installation.

Condition

Used. This is a previously installed sensor. The probe shows normal heat discoloration from service, exactly as shown in the photographs, which are of the actual item you will receive. Sold as pictured.

Shipping & Returns

Free shipping from Mesa, Arizona with tracking. 30-day returns — seller pays return shipping.

GM, GM Genuine Parts, Chevrolet, Cruze and Duramax are trademarks of General Motors. Referenced here only to describe fitment.

Specifications