Emission Systems for 2001 Audi A4
Select Emission Systems part
Bosch Oxygen Sensor
Bosch
15733
Bosch SmartLink™ Universal Oxygen (O2) sensors combine OE-specification base sensors with a flexible, patented Posi-Lock® connector...
Positions: Downstream
Fits Your Vehicle
Accessory Relay Connector
SMP CORP
S-1536
Accessory Relay Connector Accessory Relay Connector Accessory Relay Pigtail Connector Connectors Pigtail Pigtails
$62.96
Fits Your Vehicle
URO Parts Vapor Canister Purge Valve
URO
1C0906517A
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO...
$28.50
Fits Your Vehicle
Barometric Pressure Sensor Connector
SMP CORP
S-745
Barometric Pressure Sensor Connector Barometric Pressure Sensor Connector Barometric Pressure Sensor Pigtail Connector Connectors Pigtail...
$17.33
Fits Your Vehicle
Hose, crankcase breather
Vaico
V10-0737
Hose, crankcase breather Engine Crankcase Breather Hose
Positions: Pressure Regulator To Intake Manifold
$24.18
Fits Your Vehicle
Bosch Oxygen Sensor
Bosch
16073
Bosch Switching-Type Oxygen (O2) sensors provide precise air-fuel-ratio measurements to the ECU, ensuring stable combustion control and...
Positions: Downstream
$98.79
Fits Your Vehicle
Bosch Oxygen Sensor
Bosch
16978
Bosch Switching-Type Oxygen (O2) sensors provide precise air-fuel-ratio measurements to the ECU, ensuring stable combustion control and...
Positions: Downstream
$74.19
Fits Your Vehicle
URO Parts Vacuum Hose
URO
058133784A
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO...
$14.06
Fits Your Vehicle
Secondary Air Injection Pump Check Valve
VEMO
V10-66-0018
Secondary Air Injection Pump Check Valve
$181.09
Fits Your Vehicle
Secondary Air Injection Pump
Cardone
33-2003M
CARDONE Remanufactured Smog Pumps are engineered for quick installation and no comebacks. These pumps come with all necessary components...
Fits Your Vehicle
URO Parts Engine Crankcase Breather Hose
URO
058103493A
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO...
$9.70
Fits Your Vehicle
URO Parts Vacuum Check Valve
URO
1168000378
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO...
$4.71
Fits Your Vehicle
Camshaft Sensor Connector
SMP CORP
S2893
Camshaft Sensor Connector Camshaft Sensor Connector Camshaft Sensor Pigtail Connector Connectors Pigtail Pigtails
$18.13
Fits Your Vehicle
A/C Compressor Clutch Relay
SMP CORP
RY-265
A/C Compressor Clutch Relay A/C Compressor Clutch Relay Relay Relays
$6.79
Fits Your Vehicle
Febi 36274 Engine Crankcase Breather Hose
FEBI RUBBER CO
36274
Maintain proper ventilation and emissions control with the Febi Engine Crankcase Breather Hose, part number 36274. This hose routes...
$17.60
Fits Your Vehicle
NTK OE Type Oxygen Sensor
NTK Oxygen Sensors
25589
NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s...
Positions: Upstream Left, Upstream Right
Fits Your Vehicle
Secondary A.I.R. Combination Valve
Dorman
911-983
This secondary air injection check valve is designed to match the fit and function of the original valve on specified vehicles, and is...
Positions: Left
Fits Your Vehicle
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