TAUTOY O2 Oxygen Sensor Kit for 1.4L Buick & Chevrolet — Upstream + Downstream, OEM Fit

TAUTOY O2 Oxygen Sensor Upstream and Downstream 1.4L is a two-piece replacement kit engineered to restore accurate air-fuel monitoring for compatible 1.4L Buick and Chevrolet models.

If your check engine light, fuel economy, or emissions readings point to oxygen sensor issues, this TAUTOY pair gives you both upstream (pre-cat) and downstream (post-cat) sensors matched to the original equipment specifications. Each sensor is designed to meet OEM fitment numbers and provide the precise voltage and response drivers expect for 1.4L turbocharged engines.

Which vehicles will these TAUTOY O2 sensors fit?

These sensors are manufactured to match specific model years and engine sizes. They fit a range of Buick and Chevrolet models that use the 1.4L engine, covering many common trim levels and calendar years.

• Buick Encore 1.4L: 2013–2021
• Chevrolet Cruze 1.4L Eco/LT/LTZ: 2011–2015 and 2016 (Cruze Limited)
• Chevrolet Sonic 1.4L: 2012–2020
• Chevrolet Trax 1.4L: 2013–2021

How do these sensors match the original equipment numbers?

TAUTOY lists the OEM cross-reference part numbers to help you verify compatibility before purchase. The listing includes multiple manufacturer codes and part variants commonly referenced by mechanics and parts catalogs.

• Upstream sensor references: 234-4529, 2344529, 55569903, 55572993
• Downstream sensor references: 234-4528, 2344528, 55572216, 55574136
• Includes one upstream and one downstream sensor in the kit (2 PCS total)

What performance and construction features should I expect?

These sensors are built with corrosion-resistant materials and modern joining methods to improve durability in high-heat exhaust environments. The sensors are designed to deliver accurate oxygen partial pressure readings that help the engine control unit (ECU) adjust fuel trims appropriately.

• Double laser-welded stainless steel housing for longevity
• High-precision sensing element for accurate air-fuel ratio feedback
• Manufactured to provide stable response under typical driving conditions

How easy is installation and what should I prepare?

Installation is straightforward for anyone comfortable working under the vehicle and unplugging electrical connectors. Basic hand tools and a proper oxygen sensor socket will usually complete the job; if unsure, a professional mechanic can install the sensors in under an hour on most cars.

• Includes two sensors: upstream (pre-catalytic converter) and downstream (post-catalytic converter)
• Recommended tools: oxygen sensor socket, ratchet, penetrating oil for seized fittings
• Clear check-engine codes and test drive to confirm proper operation after fitment

Who this is for: This TAUTOY O2 sensor kit is intended for owners and mechanics who need a direct-fit replacement for 1.4L Buick Encore and select Chevrolet Cruze, Sonic, and Trax models. It suits drivers troubleshooting emissions or fuel-trim faults, garages stocking OEM-referenced parts, and DIYers seeking a paired upstream/downstream solution backed by a one-year warranty.