Industrial O2OxygenSensorUpstreamDownstream Oxygen Sensor Set

Description:

The O2 Oxygen Sensor Upstream & Downstream Set for the 1999 Audi A6 and A6 Quattro 2.8L is an emissions control component used in the engine management system to monitor exhaust oxygen levels and catalytic converter efficiency. Commonly installed in Audi A6 and A6 Quattro vehicles equipped with the 2.8L V6 engine where upstream and downstream oxygen sensors provide feedback to the engine control module for optimal fuel delivery and emissions performance. Maintenance technicians, automotive repair shops, and vehicle owners use these sensors for emissions repairs, check engine light diagnostics, routine maintenance, and replacement of failed exhaust sensors.

Applications:

The O2 Oxygen Sensor Upstream & Downstream Set for the 1999 Audi A6 and A6 Quattro 2.8L is designed to monitor exhaust oxygen content and catalytic converter efficiency in the vehicle's emissions system. It is commonly used in Audi A6 and A6 Quattro models equipped with the 2.8L 30-valve V6 engine where the upstream sensors regulate the air-fuel mixture and the downstream sensors monitor catalytic converter performance. Replacing these sensors can help restore engine performance, improve fuel economy, eliminate trouble codes, and ensure emissions compliance.

Technical Specifications:

• Manufacturer: Generic / Aftermarket
• Model / Part Number: Vehicle Specific
• Product Type: Oxygen Sensor Set
• Vehicle Compatibility: 1999 Audi A6, Audi A6 Quattro
• Engine Compatibility: 2.8L V6 (30-Valve)
• Engine Code Compatibility: AFC, AHA, ATQ (varies by production date)
• Sensor Positions: Upstream (Pre-Catalytic Converter) and Downstream (Post-Catalytic Converter)
• Sensor Type: Heated Oxygen Sensor (HO2S)
• Number of Sensors: 4 Total (2 Upstream, 2 Downstream)
• Connector Type: OEM Style Plug-In Connector
• Thread Size: M18 × 1.5
• Housing Material: Stainless Steel
• Sensing Element: Zirconia Ceramic
• Heater Voltage: 12 VDC Vehicle System
• Installation Location: Exhaust Manifold and Exhaust Pipe
• Function: Monitors exhaust oxygen levels and catalytic converter efficiency
• Direct Fit: Yes, OEM-style replacement
• Application Environment: Automotive exhaust and emissions systems

Common Replacements:

• Bosch 15733 Oxygen Sensor
• Denso 234-4668 Oxygen Sensor
• Audi OEM Oxygen Sensor