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 VARIANT/TRIMSECTION 75 (2.5L - IGNITION/GLOW PLUG SYSTEM - ENGINE CODE(S): CBTA & CBUA (SEDAN))28 IGNITION/GLOW PLUG SYSTEMDESCRIPTION AND OPERATIONIGNITION COMPONENT OVERVIEW
2012 Volkswagen Jetta TDI, 4D Wagon, Standard Trans
Ignition Component Overview
2012 Volkswagen Jetta TDI, 4D Wagon, Standard TransSECTION Ignition Component Overview
WARNING: This page is about a different variant/trim than selected.
- Harness Connector for the Knock Sensor 2
- Gray
- Contacts are gold plated.
- Installed location, refer to Fig 2.
- Harness Connector for the Knock Sensor 1
- Green
- Contacts are gold plated.
- Installed location, refer to Fig 2.
- Knock Sensor 2 -G66-
- Note the installed position: The wire connection points 45° toward the right on the outside.
- Knock Sensor 1 -G61-
- Note the installed position: The wire connection points downward vertically.
- Bolt
- 20 Nm
- The tightening specification the affects function of the knock sensor.
- Ignition Coil with Power Output Stage -N70, N127, N291, N292, N323-
- Removing and installing, refer to IGNITION COILS WITH POWER OUTPUT STAGES .
- Spark Plug
- 25 Nm
- Type and electrode gap, refer to TECHNICAL DATA .
- Remove and install using the spark plug removal tool3122 B.
- Bolt
- 10 Nm
- Camshaft Position Sensor -G40-
- Contacts are gold plated.
- O-ring
- No replacement part available.
- Green for the knock sensor 1
- Gray for the knock sensor 2
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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.