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SKU:
NLT1I00755
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2010-2014 Chevy Equinox GMC Terrain Downstream O2 Sensor 234-4530
$28.99
In Stock
$28.99
Sale price
$28.99
Regular price
This new aftermarket downstream oxygen sensor replaces 234-4530 and 12639692 for compatible 2010-2014 Chevrolet Equinox and GMC Terrain 2.4L applications.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Chevrolet Equinox 2.4L (2010-2014; downstream position)
- GMC Terrain 2.4L (2010-2014; downstream position)
- Chevrolet Captiva Sport 2.4L compatible applications using 234-4530; verify year and emissions
Product Overview
A catalyst-efficiency code, slow sensor response, damaged heater circuit, or seized old sensor may require a rear O2 sensor after exhaust leaks, wiring, engine operation, and catalytic-converter health are tested. The downstream sensor watches exhaust after the converter; it does not normally control fueling the same way the upstream sensor does.
Position matters. This listing is for the downstream sensor on matching 2.4L applications. Compare plug, wire length, number of wires, thread, heat shield, engine, emissions label, bank and sensor location before ordering.
Key Features & Performance
- Heated downstream oxygen sensor
- Direct connector for matching GM 2.4L applications
- Monitors exhaust after the catalytic converter
- Replacement for damaged wiring, heater failure, or slow response
Replaces Part Numbers
- 234-4530
- 12639692
- 213-4768
- 21068
- 250-24708
- 350-34620
- ES20383
Common Uses
- Replacing a rear sensor with a failed heater circuit
- Repairing melted or damaged sensor wiring
- Correcting a confirmed slow downstream response
Technical Specifications
- Product Type: Heated oxygen sensor
- Position: Downstream / after catalytic converter
- Engine: 2.4L four-cylinder compatible applications
- Condition: New aftermarket replacement
Installation & Fitment
- Confirm bank and sensor position from scan data
- Repair exhaust leaks before blaming the sensor
- Compare connector and lead length
- Use a sensor socket and protect wiring from twisting
- Clear codes and review live data after a complete drive cycle
Compatibility Notice
Northline Parts does its best to list all known compatible models. The correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Will this fix a P0420 code? A: Not necessarily. P0420 can come from a failing converter, exhaust leak, engine problem, or sensor issue.
Q: Is this the upstream sensor? A: No. It is listed for the downstream position after the catalytic converter.
Q: Can a damaged wire cause the same code as a bad sensor? A: Yes. Inspect the harness near hot exhaust and moving parts.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: 234-4530 downstream O2 sensor, 2010-2014 Equinox oxygen sensor, GMC Terrain rear O2 sensor, 12639692 replacement, 2.4L catalyst monitor sensor
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.