Audi Volkswagen EA837 3.0 Supercharged V6: Specs, Engine Codes & Maintenance
Audi / Volkswagen · Supercharged petrol
EA8373.0 TFSI V6
The “T” badge hides a supercharger. A belt-driven Roots blower gives the EA837 3.0 TFSI its immediate response and broad torque delivery, whether it is pulling an S4 or a Q7. Later versions add a supercharger clutch and combined port/direct injection, making the engine code more useful than the badge.
Specifications
Architecture
- Bore × stroke
- 84.5 × 89.0 mm
- Block / heads
- Aluminium / aluminium
- Cam drive
- Timing chains · gearbox end
- Installation
- Longitudinal
Induction & fuel
- Supercharger
- Belt-driven Roots type
- Charge cooling
- Water-to-air intercoolers
- Earlier versions
- Direct petrol injection
- CREC / CREH versions
- Direct + port injection; clutched blower
Factory output examples
- S4 / S5 3.0T
- 333 hp / 325 lb-ft
- SQ5 · CTUD
- 354 hp / 346 lb-ft
- A6 / A7 · 2016
- 333 hp / 325 lb-ft
- Touareg Hybrid
- 380 hp / 428 lb-ft combined
Control & service
- Earlier engines
- Continental Simos 8 family
- Later CREC / CREH
- Continental Simos 16 family
- Fuel grade
- Premium; check fuel label
- Oil approval
- Vehicle-specific VW approval
This guide covers the supercharged 3.0-litre EA837. Output varies with the vehicle and calibration; Touareg Hybrid figures include the electric motor.
Vehicles by engine code
| Engine code | Vehicle | Model years | Chassis |
|---|---|---|---|
| CCAA | Audi A6 3.0T | 2009–2011 | C6 / 4F |
| CCBA / CGXC / CTUB | Audi S4 | 2010–2016 | B8 / 8K |
| CCBA / CGXC / CTUB | Audi S5 Cabriolet | 2010–2017 | 8F |
| CGXC / CTUB | Audi S5 Coupé | 2013–2017 | 8T |
| CGXB / CTUA | Audi A6 / A7 3.0T | 2012–2015 | C7 / 4G |
| CREC / CREH | Audi A6 / A7 3.0T | 2016–2018 | C7 / 4G |
| CGXC / CTUB / CREC | Audi A8 L 3.0T | 2013–2018 | D4 / 4H |
| CGXD / CTUC | Audi Q5 3.0T | 2013–2017 | 8R |
| CTUD | Audi SQ5 | 2014–2017 | 8R |
| CJWB / CJWC / CJWE / CTWA / CTWB | Audi Q7 3.0T | 2011–2015 | 4L |
| CREC | Audi Q7 3.0T | 2017–2019 | 4M |
| CGFA | Volkswagen Touareg Hybrid | 2011–2015 | 7P |
Selected U.S./Canadian applications. Codes can change within a model year; confirm the vehicle data label and ECU part number before ordering parts or software.
Common faults & maintenance
- Coolant leaks. Check the water pump, thermostat and pipes beneath the supercharger. Unexplained coolant loss also calls for inspection of the charge coolers.
- PCV and oil consumption. A faulty pressure-regulating valve can affect crankcase pressure and oil use. Follow the applicable Audi test procedure before blaming piston rings.
- Start-up rattle. Record when it happens and check oil level, pressure and cam timing. A brief start-up noise and persistent chain noise require different assessments.
- Airflow and ignition. Investigate intake deposits, secondary-air restrictions, plugs and coils when faults or misfires appear. Service the supercharger belt and inspect its drive.
Keep it healthy. Use the required oil approval and match service frequency to distance, time and operating conditions. Address coolant loss early. Clean intake and secondary-air passages when diagnosis indicates a restriction, with no blanket 80,000 km requirement.
References
| Subject | Source |
|---|---|
| Design & specifications | Audi supercharged V6 trainingAudi fourth-generation V6 training |
| Vehicle applications | Audi build guideVolkswagen build guideAudi 2018 model-range announcement |
| Service information | Audi oil-consumption bulletinAudi crankcase-pressure bulletin |
