Denso 234-4040 Oxygen Sensor

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

• Delphi ES20186
• Bosch 15326
• Bosch 15429
• ACDelco 2132974
• Mazda AJ6018861B
• Mazda KLS718861B
• Delphi ES20375
• NTK 22097
• Mazda AJ6018861A
• Mazda KLS718861A
• Walker Products 25024376
• Borg Warner OS1795
• Borg Warner OS1807
• Walker Products 25024086
• Walker Products 35034510
• Standard Ignition SG1041
• Standard Ignition SG1053
• ACDelco 2132974
• Walker Products 25024086
• Walker Products 25024376
• NAPA Mileage Plus 2344040

• 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.