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 MANUALSVOLKSWAGEN1999PASSAT SEDAN (3B2) V6-2.8L (AHA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORLOCATIONSOVERVIEW OF COMPONENT LOCATIONS
1999 Volkswagen Passat Sedan (3B2) V6-2.8L (AHA)
Overview of Component Locations
1999 Volkswagen Passat Sedan (3B2) V6-2.8L (AHA)SECTION Overview of Component Locations
Motronic Multiport Fuel Injection (MFI) system
Component locations
1 - Harness connector
- 4-pin connect of, green
- For O2S behind TWC -G130- and O2S heater - Z29-
- For bank 1, sensor 2
2 - Harness connector
- 4-pin connector, brown
- For O2S 2 behind TWC -G131- and O2S heater - Z30
- For bank 2, sensor 2
3 - Harness connector
- 4-pin connector, black
- For HO2S -G39- and O2S heater -Z19-
- For bank 1, sensor 1
4 - Harness connector
- 3-pin connector, blue
- For Knock Sensor (KS) 1 -G61-, bank 1
5 - Engine - Coolant Temperature (ECT) sensor -G62-
6 - Secondary Air Injection (AIR) solenoid valve -N112-
7 - Intake Air - Temperature (IAT) sensor -G42-
8 - Intake Manifold Tuning (IMT) valve -N156- (change over valve)
9 - Throttle valve control module -J338-
10 - Harness connector
- 4-pin connector, black
- For HO2S 2 -G108- and O2S heater -Z28-
- Bank 2, sensor
11 - Harness connector
- 3-pin connector, blue
- For Knock Sensor (KS) 2 -G66-, bank2
12 - Harness connector
- 3-pin connector, gray
- For Engine Speed (RPM) sensor -G28-
13 - Motronic Engine Control Module (ECM) -J220-
- Location See in protective housing in plenum, left side
14 - Fuel pressure regulator
15 - Camshaft Position (CMP) sensor -G40-
- Cylinder bank 2
- Location, Service and Repair
16 - Heated Oxygen Sensor (HO2S) 2 -G108-
- Tightening torque: 50 Nm (37 ft lb)
- Cylinder bank2
17 - Engine Speed (RPM) sensor -G28-
18 - Knock Sensor (KS) 2 -G66-
- Cylinder bank 2
- Removing and installing, Service and Repair
19 - Valve -2- for camshaft adjustment -N208-
- Cylinder bank 2
20 - Ignition coils -N-, -N128-, -N158-
- With power output stage -N122-
- Removing and installing, Service and Repair
21 - Knock Sensor (KS) 1 -G61-
- Cylinder bank 1
- Removing and installing, Service and Repair
22 - Fuel injectors
- Cylinder 1: -N30-
- Cylinder 2: -N31-
- Cylinder 3: -N32-
- Cylinder 4: -N33-
- Cylinder 5: -N83-
- Cylinder 6: -N84-
23 - Camshaft Position (CMP) sensor 2 -G163-
- Cylinder bank 1
- Removing and installing, Service and Repair
24 - Ground connection
- On engine support, right
25 - Heated Oxygen Sensor (HO2S) -G39-
- Tightening torque: 50 Nm (37 ft lb)
- Cylinder bank 1
26 - Valve-1- for camshaft adjustment -N205-
- Cylinder bank 1
27 - Secondary Air Injection (AIR) pump motor - V101-
28 - Mass Air Flow (MAF) sensor -G70-
29 - Evaporative - Emission (EVAP) canister purge regulator valve -N80-
- On air cleaner
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.