What are the symptoms of a bad O2 sensor?

A failing or failed O2 sensor may not detect the engine’s air-fuel ratio running too rich or too lean. Common signs include an illuminated check engine light, poor fuel economy, rough idling or failed emissions testing.

Can a bad O2 sensor cause the check engine light to come on?

Yes. When incorrect oxygen levels are detected in the exhaust, the sensor will trigger the sensor to send a fault code and turn on the check engine light.

Will replacing an O2 sensor improve gas mileage?

A properly functioning O2 sensor can help the vehicle maintain the optimal air-fuel ratio for combustion, helping balance fuel economy, engine performance and emissions.

How long do O2 sensors last?

O2 sensors can last between 60,000 and 100,000 miles. However, O2 sensor longevity depends on numerous factors including heat, carbon buildup and normal wear.

Why choose GM Genuine Parts O2 sensors instead of aftermarket brands?

GM Genuine Parts O2 sensors are engineered to original equipment specifications for precise fit, form and function. They are designed to integrate seamlessly with your vehicle’s engine.

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GM Genuine Parts 12627139 Heater Oxygen Sensor

GM Genuine Parts 12627139 Heater Oxygen Sensor

Product ID: 52499802

Details

Brand
GM GENUINE
Item Weight
0.22 Pounds
Item dimensions L x W x H
8.2 x 3.2 x
Measurement Accuracy
±1%
Style
Modern

🎯±1% measurement accuracy

🔥850°C heat tolerance

⏱️5 min fast response

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Description

🔥 Stay ahead of the curve with GM’s precision oxygen sensor — because your ride deserves genuine performance.

GENUINE OE QUALITY BACKED BY GM - Tested and validated by GM engineers for your Chevrolet, Buick, GMC, or Cadillac.
BUILT TO ENDURE EXTREME CONDITIONS - Operates flawlessly up to 850°C for reliable long-term use.
RAPID FEEDBACK FOR REAL TIME EFFICIENCY - 5-minute response time ensures your engine adapts instantly.
PRECISION ENGINEERED FOR PEAK PERFORMANCE - Achieve optimal air/fuel ratio with ±1% oxygen measurement accuracy.
SEAMLESS INTEGRATION WITH VEHICLE SYSTEMS - Designed for exact fit and requires professional programming for flawless operation.

The GM Genuine Parts 12627139 Heater Oxygen Sensor is a high-precision, OE-quality sensor engineered to optimize your vehicle’s air/fuel ratio by accurately measuring oxygen levels in exhaust gases. Built to withstand extreme temperatures up to 850°C and delivering rapid 5-minute response times, this sensor ensures peak engine performance, improved fuel economy, and reduced emissions. Backed by GM’s rigorous testing and a 24-month unlimited mile warranty, it’s the trusted choice for Chevrolet, Buick, GMC, and Cadillac owners seeking reliable, factory-grade replacement parts.

Specifications

ASIN	B008MOQID4
Best Sellers Rank	#328,941 in Automotive ( See Top 100 in Automotive ) #1,402 in Automotive Replacement Oxygen Sensors
Brand	GM GENUINE PARTS
Brand Name	GM GENUINE PARTS
Customer Reviews	4.2 out of 5 stars 123 Reviews
Included Components	Sensor Asm
Item Dimensions	8.2 x 3.2 x 3.2 inches
Item Type Name	Sensor Asm
Item Weight	3.52 ounces
Item dimensions L x W x H	8.2 x 3.2 x 3.2 inches
Manufacturer	ACDelco
Material	Ceramic, Stainless Steel
Material Type	Ceramic, Stainless Steel
Measurement Accuracy	±1%
Measuring Range	0-100% O2
Model	12627139
Mounting Type	Flange Mount
Output Type	Push-Pull
Part Number	12643707
Response Time	5 minutes
Smart Home Compatibility	Not Smart Home Compatible
Specific Uses For Product	Oxygen Sensor
Style	Modern
Style Name	Modern
UPC	808709376804
Unit Count	1.0 Count
Upper Temperature Rating	850 Degrees Celsius
Warranty Description	24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.

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₨1613

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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