F-DIESEL O2 Oxygen Sensor 234-4018 Downstream Fit For Buick Regal Chevy GMC Cadillac

Got a check engine light related to your oxygen sensor?

This F-DIESEL O2 sensor (part # 234-4018) is a direct drop-in replacement for a ton of GM vehicles like the Buick Regal, Chevy, GMC, and Cadillac.

It's a front, 4-wire sensor with a mini-blade terminal, and it comes with a 1-year warranty.

The seller's note says it's got a 2-year unlimited mileage warranty and ships fast—so it's legit.

Just pop it in and clear that code.

Matches OE numbers like 12597990 and 12604913.

If you're not 100% sure, just tell 'em your year, make, and model.

Easy peasy.