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 MANUALSVOLKSWAGEN2010GOLF (5K1) L5-2.5L (CBTA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSLOCATIONSEXHAUST SYSTEM OVERVIEW
2010 Volkswagen Golf (5K1) L5-2.5L (CBTA)
Exhaust System Overview
2010 Volkswagen Golf (5K1) L5-2.5L (CBTA)SECTION Exhaust System Overview
Engine Management System
Exhaust System Overview
• 2.0L CCTA / CBFA => [ 2.0L CCTA / CBFA ]
• 2.0L CRZA => [ 2.0L CRZA ]
• 2.0L CJAA TDI => [ 2.0L CJAA TDI ]
• 2.5L CBTA / CBUA => [ 2.5L CBTA / CBUA ]
2.0L CCTA / CBFA
1 - Heated Oxygen Sensor (HO2S) -G39-
Integrated with Oxygen Sensor (O2S) Heater -Z19- - on some options
• Bank 1 sensor 1
• 2.0L CJAA TDI location
• 2.5L CBTA and CBUA location
3 - Heated Oxygen Sensor (HO2S) 2 -G108-
• With engine code CBFA
• Bank 1 sensor 2
4 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-
• Bank 1 sensor 3
• 2.0L CJAA TDI location
• 2.5L CBTA and CBUA location
2.0L CRZA
2 - Heated oxygen sensor -G39-
4 - Oxygen sensor after three way catalytic converter -G130-
-
5 - Exhaust door valve 1 -N321-
Located in the left rear wheel arch.
2.0L CJAA TDI
8 - Heated Oxygen Sensor (HO2S) -G39-
• 2.0L CJAA TDI shown
• 2.5L CBTA and CBUA location
16 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-
• 2.0L CJAA TDI shown
• 2.5L CBTA and CBUA location
2.5L CBTA / CBUA
4 - Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC), Bank 1 -G465-
• 2.5L CBUA shown
9 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-
• 2.5L CBUA shown
2.5L CBTA / CBUA continued
7 - Heated Oxygen Sensor (HO2S) -G39-
• 2.5L CBUA shown
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.