Bosch Oxygen Sensor 15284 — Direct-Fit OE Replacement (Single) with Fast Heater & Corrosion-Resistant Stainless Steel

This Bosch premium OE-fit oxygen sensor combines decades of Bosch sensor engineering with factory-level testing and corrosion-resistant construction to provide a ready-to-install replacement for select Buick, Cadillac, Chevrolet, GMC and Isuzu models. Designed to reach operating temperature quickly and withstand exhaust exposure, the 15284 helps your vehicle’s engine management system measure oxygen levels reliably so fuel delivery and emissions control perform as intended.

How does this sensor reach operating temperature faster than standard units?

The 15284 uses an integrated fast-acting heater element that brings the sensing element up to working temperature within seconds. Faster warm-up reduces the time the engine runs in open-loop (less efficient) and improves the sensor’s response right after cold starts.

• Built-in heater designed for planar and thimble-style 3-, 4- and 5-wire sensors
• Heats quickly to shorten open-loop operation time
• Improved early-drive emissions control and fuel metering

What construction features protect the sensor from exhaust damage?

Bosch encases the sensing element in a double laser-welded stainless steel body and fully seals the unit to resist corrosive exhaust conditions. The assembly is manufactured to withstand immersion and heavy exposure to combustion byproducts, extending useful life in harsh underbody environments.

• Double laser-welded stainless steel housing for corrosion resistance
• Fully submersible, sealed design to resist exhaust contamination
• Durable protection tube visible after Bosch factory testing

Is installation straightforward for DIYers and shops?

Yes — the 15284 is supplied with true direct-fit OE-style connectors and harnesses and comes with threads pre-coated in anti-seize compound so the sensor can be installed without extra preparation. That reduces shop time and prevents cross-threading or galling during replacement.

• OE-style connector and harness for plug-and-play fitment
• Threads pre-coated with anti-seize — ready to install out of the box
• Direct-fit design avoids the need for splice kits or adapter wiring in compatible models

Which vehicles and sensor positions does this part cover?

The 15284 is designed for specific GM and Isuzu applications — verify compatibility using your vehicle’s year, engine, and sensor location before purchase. Fitment varies by model and engine option, so use the fitment checker to confirm the correct position (upstream/downstream) for your vehicle.

• Commonly compatible with various 2003–2005 Chevrolet, GMC, and Cadillac models
• Also listed for select 2005 Buick and Isuzu vehicles — check exact engine match
• Confirm sensor position (pre- or post-catalyst) when verifying fitment

Who this part is for: drivers and mechanics who need a reliable, OEM-style oxygen sensor replacement that’s factory-tested, robustly built, and designed for quick heater activation. If you own a compatible Buick, Cadillac, Chevrolet, GMC or Isuzu and want a straightforward direct-fit replacement that reduces downtime and resists exhaust corrosion, the Bosch 15284 is engineered to meet those needs without added modification. Always confirm exact vehicle fitment and sensor position before ordering to ensure proper operation and compatibility.