higherbro Oxygen O2 Sensor Pair (Upstream & Downstream) for GM 1.8L–2.5L — Stainless Steel, 12V Compatible

higherbro 2PCS Oxygen O2 Sensor 1 & 2 is a two-piece replacement set (upstream and downstream) engineered to restore proper oxygen sensing for compatible Chevrolet, Buick, Cadillac and GMC 1.8L–2.5L engines.

This pair of sensors is built from stainless steel and heat-resistant alloys to withstand engine bay temperatures and provide electrical oxygen-signal output compatible with 12V vehicle systems. The kit contains one upstream (pre-catalytic converter) and one downstream (post-catalytic converter) sensor, and it’s offered with a one-year quality guarantee. Before purchasing, confirm fitment with your vehicle year, make, model and engine using the “Select Your Vehicle” tool so you get the correct sensor locations and wiring options.

How will these sensors affect my vehicle’s performance?

Oxygen sensors provide the engine control unit with exhaust oxygen readings that the ECU uses to adjust air–fuel mixture and catalytic converter operation. Replacing worn or failing sensors can help the engine run closer to its designed air–fuel ratios and reduce symptoms associated with rich or lean conditions. While not a tune-up, fresh sensors can improve responsiveness and emissions control.

• Upstream sensor supplies immediate air–fuel data to the ECU.
• Downstream sensor monitors catalytic converter efficiency.
• Stainless-steel construction resists corrosion and heat cycling.
• Designed for 12V vehicle electrical systems.

Which vehicles and engine sizes are compatible with this set?

This higherbro set targets a range of GM vehicles that use 1.8L, 2.0L and 2.5L engines. It covers specific model years across Chevrolet, Buick, Cadillac and GMC, but not every trim—verify fitment by entering your vehicle details before ordering. The product listing includes common models like Malibu, Envision, Regal, ATS, Cascada, Impala, Acadia and Canyon within the years indicated.

• Fits many 2013–2019 Chevrolet Malibu variants (check exact engine).
• Compatible with Buick Cascada, Envision, Lacrosse and Regal where specified.
• Includes Cadillac ATS model years listed for 2.0L and 2.5L engines.
• Also fits specified GMC Acadia and GMC Canyon 2.5L years.

What are the construction and electrical specifications?

Each sensor housings use stainless steel and high-temperature alloys to tolerate exhaust heat up to the product’s rated limits. The sensors output electrical signals for the vehicle’s engine control system and operate on standard 12‑volt direct current used in passenger vehicles. The physical design includes wiring and connectors compatible with the OE-style harness for supported models.

• Materials: stainless steel and heat-resistant alloys.
• Rated for high-temperature exhaust environments (manufacturing spec limits apply).
• Electrical output: signal voltage compatible with ECU inputs on 12V systems.
• Pack includes: 1 upstream sensor + 1 downstream sensor.

How do I install and what warranty is included?

Installation typically requires removing the old sensors from the exhaust pipes and threading the new sensors into the same ports; some vehicles may require a sensor socket or anti-seize on threads. If you’re not comfortable working under the vehicle, a professional technician can perform the swap quickly. higherbro backs this kit with a one-year quality guarantee that covers manufacturing defects under normal use.

• Installation: bolt-in replacement, may need oxygen-sensor socket.
• Use anti-seize sparingly on threads if recommended; avoid contaminating sensor tip.
• One-year quality guarantee against manufacturing defects.
• Confirm vehicle fitment prior to return to avoid fit-related issues.

Who is this for: drivers and DIY mechanics owning compatible Chevrolet, Buick, Cadillac or GMC vehicles with 1.8L–2.5L engines who need a matched upstream and downstream oxygen sensor set to replace aging or failed sensors. It’s suited for owners seeking an OE-style replacement built for heat resistance and standard 12V electrical systems. Always confirm fitment for your exact year, make, model and engine before ordering to ensure plug-and-play compatibility.