Denso 234-4821 Oxygen Sensor

Buyer fitment guide only intended as reference. Please use catalogue search by vehicle to ensure proper fitment.

• Bosch 16379
• Delphi ES20011
• Bosch 16378
• Bosch 16349
• Bosch 16546
• Bosch 16595
• Bosch 16743
• ACDelco 2131515
• ACDelco 2131582
• ACDelco 2131516
• ACDelco 2134546
• Saab 93186115
• Bosch 16733
• ACDelco 2134644
• NTK 25727
• Saab 12619211
• Borg Warner OS1525
• Borg Warner OS1526
• Standard Ignition SG277
• Walker Products 25024612
• Walker Products 35034491
• GMC 12571768
• GMC 12619211
• GMC 24402859
• GMC 24402860
• GMC 55568266
• GMC 55574135
• GMC 92210450
• Walker Products 250241125
• Walker Products 35034685
• Standard Ignition SG771
• Standard Ignition SG772
• ACDelco 2131515
• ACDelco 2131516
• ACDelco 2131582
• ACDelco 2134546
• ACDelco 2134644
• Walker Products 25024612
• NAPA Mileage Plus 2344821

• DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
• Aluminum-Oxide Trap Layer €“ Keeps silicone and lead outside the ceramic elient through DENSO€™s exclusive design, preventing damage to the platinum electrode.
• Double Protection Cover €“ Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
• Porous PTFE Filter €“ Allows atmospheric oxygen to enter the sensor without permitting water or engine contaminants to seep into the casing.
• Robotic Laser Weld
• Stainless Steel Housing €“ Resists corrosion and contamination with a rugged, watertight body.