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 MANUALSVOLKSWAGEN2012JETTA TDI, 4D WAGON, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 20 (1.4L - IGNITION/GLOW PLUG SYSTEM - ENGINE CODE(S): CNLA & CRJA (SEDAN))28 IGNITION/GLOW PLUG SYSTEMIGNITION SYSTEMOVERVIEW - IGNITION SYSTEM
2012 Volkswagen Jetta TDI, 4D Wagon, Standard Trans
Overview - Ignition System
2012 Volkswagen Jetta TDI, 4D Wagon, Standard TransSECTION Overview - Ignition System
WARNING: This page is about a different car, the 2014 Volkswagen Jetta and 2013 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- Bolt
- 20 Nm
- Tightening specifications affect function of knock sensor
- Knock Sensor 1 -G61-
- Removing and installing, refer to Knock Sensor 1 -G61-, REMOVING AND INSTALLING .
- Spark Plug
- Remove and install using the Spark Plug Removal Tool 3122B
- Tightening specification
- Replacement interval, refer to Maintenance Tables.
- Ignition Coil with Power Output Stage
- Ignition Coil 1 with Power Output Stage -N70-
- Ignition Coil 2 with Power Output Stage -N127-
- Ignition Coil 3 with Power Output Stage -N291-
- Ignition Coil 4 with Power Output Stage -N292-
- Removing and installing, refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .
- Bolt
- 8 Nm
- Bolt
- 8 Nm
- Camshaft Position Sensor 3 -G300-
- Removing and installing, refer to Camshaft Position Sensor 3 -G300-, REMOVING AND INSTALLING .
- O-Ring
- Bolt
- 8 Nm
- Camshaft Position Sensor -G40-
- Removing and installing, refer to Camshaft Position Sensor -G40-, REMOVING AND INSTALLING .
- O-Ring
- Replace if damaged
- Sensor Wheel
- For Engine Speed Sensor -G28-
- Removing and installing, refer to Sealing Flange, Removing And Installing, Transmission Side .
- Sealing Flange, Transmission Side
- Removing and installing, refer to Sealing Flange, Removing And Installing, Transmission Side .
- Engine Speed Sensor -G28-
- Removing and installing, refer to Engine Speed Sensor -G28-, REMOVING AND INSTALLING .
- Bolt
- 4.5 Nm
RENDER: 1.0x
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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.