Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2003PASSAT SEDAN (3B3) L4-1.8L TURBO (AWM)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSAIR INJECTIONLOCATIONS
2003 Volkswagen Passat Sedan (3B3) L4-1.8L Turbo (AWM)
Air Injection: Locations
2003 Volkswagen Passat Sedan (3B3) L4-1.8L Turbo (AWM)SECTION Locations
Secondary Air Injection (AIR) system components
Notes: Components marked with * are checked via On Board Diagnostic (OBD)
^ Components marked with ** are tested via output Diagnostic Test Mode (DTM):
^ Secondary Air Injection (AIR) pump relay -J299 **, refer to Air Injection Pump Relay.
1- Combination valve
^ Checking, Refer to Air Injection Control Valve.
2- Gasket
^ Always replace
3- Bracket
^ Bolted at cylinder head
4- Gasket
^ Always replace
5- Bracket
^ Bolted at intake manifold
6- 10 Nm
7- To recirculating valve for turbocharger -N249-
8- From vacuum - reservoir/intake manifold connection
9- 6 Nm
10- Secondary Air Injection (AIR) solenoid valve -N112 */**
^ Resistance: 25 to 35 Q
11- Connector
^ 2-pin
^ green
12- O-ring
^ Replace if damaged
13- Pressure hose
^ Check for secure fitting
^ To disengage, squeeze together at front
14- 8 Nm
15- Bracket
^ For Secondary Air Injection (AIR) pump motor
16- 8 Nm
17- Secondary - Air Injection (AIR) pump motor -V101.**
^ Checking function, Refer to Air Injection Pump.
18- Connector
^ 2-pin
^ For Secondary Air Injection (AIR) pump motor
19- Intake hose
^ For Secondary Air Injection (AIR) pump
20- From air filter
21- Connection - tube
22- Elbow
^ Secure with screw type clamps or spring clamps
23- Pressure line
24- Connecting - piece
^ Secure with screw type clamps or spring clamps
Fig. 1 Secondary Air Injection
(AIR) pump relay-J299 (arrow)
Note:
^ Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
^ Obtain radio code for radios with anti-theft coding before disconnecting battery.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.