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- Emission Control
- Oxygen Sensor
- Diesel Glow Plug Relay
- Secondary Air Injection Relay
- Exhaust Gas Recirculation (EGR) Valve Control Solenoid
- Secondary Air Injection Pump Check Valve
- Engine Crankcase Breather Element
- Vapor Canister Purge Valve
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- Barometric Pressure Sensor
- Engine Cylinder Head Temperature Sensor
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- Exhaust Gas Recirculation (EGR) Valve Position Sensor
- Exhaust Gas Recirculation (EGR) Valve Temperature Sensor
- Ignition Knock (Detonation) Sensor
- Engine Intake Manifold Temperature Sensor
- Mass Air Flow Sensor
- Vapor Canister Purge Solenoid
- Vacuum Pump
- Vacuum Reservoir
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- Emission Check Valve
- Air / Fuel Ratio Sensor
- Secondary Air Injection Pump Connector
- Secondary Air Injection Pump Hose
- Secondary Air Injection Pump Solenoid Valve
- Engine Crankcase Breather Connector
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- Engine Crankcase Vent Valve
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- PCV Valve Hose
- Vapor Canister Purge Valve Assembly
- Vacuum Control Valve
- Vacuum Hose Connector
- Vacuum Pump Gasket
- Vacuum Pump Repair Kit
- Engine Crankcase Breather Gasket
- Evaporative Emissions System Leak Detection Pump
- Secondary Air Injection Pump Mount
- Engine Crankcase Breather Hose Connector
- Vacuum Line
- Mass Air Flow Sensor O-Ring
- Secondary Air Injection Bypass Valve Gasket
- Exhaust Gas Recirculation (EGR) Vacuum Delay Valve
- PCV Valve Kit
- Vacuum Check Valve
- Manifold Absolute Pressure Sensor
- Engine Crankcase Breather Pipe
- Exhaust Gas Recirculation (EGR) Line Gasket
- Engine Crankcase Vent Valve Seal
- Engine Crankcase Vent Kit
- Exhaust Gas Recirculation (EGR) Cooler
- Vacuum Suction Pump
- Vapor Canister Vent Solenoid
- Exhaust Gas Temperature (EGT) Sensor
- Evaporative Emissions System Leak Detection Assembly
- Vapor Canister Purge Solenoid Connector
- Diesel Exhaust Fluid (DEF) Pump
- Diesel Exhaust Fluid (DEF) Tank
- Engine Crankcase Breather Hose Check Valve
- Evaporative Emissions System Pressure Sensor
- Exhaust Gas Recirculation (EGR) Cooler Gasket
- Secondary Air Injection Solenoid
- Secondary Air Injection Pump Adapter
- Secondary Air Injection Pump Bolt
- Secondary Air Injection Pump Bracket
- Secondary Air Injection Pump Nut
- Secondary Air Injection Control Valve Gasket
- Secondary Air Injection Pump
- Exhaust Gas Recirculation (EGR) Vacuum and Evaporation Pressure Regulator Solenoid Valve
- Mass Air Flow Sensor Bolt
- Secondary Air Injection Check Valve
- Exhaust Gas Recirculation (EGR) Valve Air Regulator Flap
- Exhaust Gas Recirculation (EGR) Tube
- Exhaust Gas Recirculation (EGR) Tube Clamp
- Exhaust Gas Recirculation (EGR) Tube Gasket
- Vapor Canister Bolt
- Vapor Canister Bracket
- Emission Label
- Secondary Air Injection Control Valve
- Evaporative Emissions System Lines
- Evaporative Emissions System Line Clamp
- Exhaust Gas Recirculation (EGR) Temperature Switch
- Secondary Air Injection Hose
- Secondary Air Injection Pipe
- Vacuum Pump Seal
- Secondary Air Injection Pump Bushing
- Ignition Knock (Detonation) Sensor Bolt
- Exhaust Gas Recirculation (EGR) Valve Bolt
- Secondary Air Injection Air Mass Sensor
- Diesel Exhaust Fluid (DEF) Module
- Engine Crankcase Breather Hose Kit
- Diesel Exhaust Fluid (DEF) Injector Feed Line
- Diesel Exhaust Fluid (DEF) Pressure Sensor
- Diesel Particulate Sensor
- Secondary Air Injection Pump Grommet
- Secondary Air Injection Pump Insulator
- Nitrogen Oxide (NOx) Sensor
- Exhaust Gas Recirculation (EGR) Valve O-Ring
- Exhaust Gas Recirculation (EGR) Valve Seal
- PCV Valve Hose Seal
- Manifold Absolute Pressure Sensor Screw
- Mass Air Flow Sensor Clamp
- Mass Air Flow Sensor Clip
- Mass Air Flow Sensor Screw
- Mass Air Flow Sensor Seal
- Vacuum Line Adapter
- Vacuum Line Clamp
- Vacuum Line O-Ring
- Secondary Air Injection Pump Hose Clamp
- Exhaust Gas Recirculation (EGR) Cooler Clamp
- Secondary Air Injection Pump Hose Gasket
- Secondary Air Injection Pump Hose Clip
- Secondary Air Injection Pump Mount Insulator
- Secondary Air Injection Pump Hose Bolt
- Exhaust Gas Recirculation (EGR) Pressure Converter
- Exhaust Gas Recirculation (EGR) Cooler Coolant Pipe Gasket
- Diesel Exhaust Fluid (DEF) Filler Pipe Clamp
- Diesel Exhaust Fluid (DEF) Filler Pipe Cap
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Models
Year
2021 Audi A4 Oxygen Sensor - Genuine and OEM replacement parts
Discover top-quality Genuine, OEM, and Aftermarket Oxygen Sensors for the 2021 Audi A4. Enhance your vehicle's performance and fuel efficiency while reducing emissions. Experience smoother driving with precise air-fuel mixture control. Shop now for optimal performance!
