Denso 234-4478 Oxygen Sensor - Downstream

Overview of Denso OE Style Oxygen Sensor 234-4478

The Denso OE Style Oxygen Sensor 234-4478 is designed specifically for BMW 528i and X3 models. This heated oxygen sensor features a threaded mounting type and a 14.02-inch wiring harness, ensuring precise fitment and reliable performance in emission control systems.

• Heated oxygen sensor for accurate emissions monitoring
• Specific fit for BMW 528i and X3 models
• Threaded mounting with 0.708-inch thread diameter
• Four-wire design with male connector
• 14.02-inch wiring harness length for proper installation

Detailed Product Description

The Denso 234-4478 oxygen sensor is engineered to meet the exact specifications of BMW 528i and X3 vehicles. Its heated sensor type allows for faster warm-up times, improving fuel efficiency and reducing emissions. The sensor’s four-wire configuration includes a male connector, facilitating a secure electrical connection. With a 0.708-inch thread diameter and threaded mounting type, this sensor installs directly into the exhaust system, providing accurate oxygen level readings to the engine control unit.

This oxygen sensor is part of Denso’s OE Style product line, which focuses on delivering components that match original equipment specifications. The OE Style line ensures compatibility and performance consistent with factory-installed parts, making it a reliable choice for emission control sensor replacements.

Common Applications and Issues Addressed

• Helps resolve poor fuel economy caused by faulty oxygen sensors
• Addresses rough engine idle and hesitation issues
• Reduces increased emissions and failed emissions tests
• Corrects check engine light triggers related to oxygen sensor faults
• Improves overall engine performance and responsiveness

Installation Notes and Tips

• Ensure vehicle compatibility with BMW 528i and X3 models before installation
• Use appropriate tools to avoid damaging the 0.708-inch threaded sensor
• Check wiring harness length (14.02 inches) for proper routing and connection
• Verify the male connector fits securely with the vehicle’s wiring harness
• Follow manufacturer torque specifications when mounting the sensor

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet stringent quality standards, ensuring durability and reliable operation. While specific warranty details for part number 234-4478 should be confirmed at the point of purchase, Denso products typically come with a limited warranty covering defects in materials and workmanship.