"Is the A6 2.0 TDI reliable, and what should you check?"
When buying a used Audi A6 2.0 TDI 2015 (C7 / facelift), the most frequently mentioned issue is water pump / plastic cooling component failures. Carbon buildup and EGR failure are also commonly reported.
Engines available in this year
Engine varies by trim; verify the engine code on the listing.
CRBC,CRLB,CRUA,DBGA,DEJA,DCYA
2.0 TDI · 2.0 TDI (150 bg)
DETA
2.0 TDI · 2.0 TDI (190 bg)
DEUA
2.0 TDI · 2.0 TDI (150 bg)
DEUC
2.0 TDI · 2.0 TDI (122 bg)
CNHA
2.0 TDI · 2.0 TDI (190 bg)
CGLC,CMGB
2.0 TDI · 2.0 TDI (177 bg)
CJCD,CMFB,CSUA
2.0 TDI · 2.0 TDI (150 bg)
CJCB
2.0 TDI · 2.0 TDI (136 bg)
CJCC
2.0 TDI · 2.0 TDI (120 bg)
EA288/CNHA
2.0 TDI · 2.0 TDI (190 bg)
CDDA,CNHA
2.0 TDI · 2.0 TDI (190 bg)
CGLC
2.0 TDI · 2.0 TDI (177 bg)
CJCD,CMFB
2.0 TDI · 2.0 TDI (150 bg)
CJCD
2.0 TDI · 2.0 TDI (150 bg)
EA288/CUVC,DBBA,DFTA
2.0 TDI · 2.0 TDI (150 bg)
EA288/CUVD,DFTC
2.0 TDI · 2.0 TDI (120 bg)
Known issues and risks
Listed from most frequently reported, each with its source.
Water pump / plastic cooling component failures
Often reported
Some versions of the 2.0 TDI report increased sensitivity of cooling circuit components (water pump, thermostat, plastic pipes), and these parts may fail more frequently than others.
Cooling
Carbon buildup and EGR failure
Often reported
Carbon deposits can form over time in the EGR valve and intake ports; this can cause uneven pulling, power loss, and engine warning lights. This phenomenon is more noticeable in city driving and may manifest as sluggish throttle response or increased fuel consumption.
Engine Bay
Oil leaks from gaskets and valve cover
Often reported
Recurring oil leaks from the valve cover gasket and other seals can potentially cause a drop in oil level.
Engine Bay
Timing belt/tensioner (wear/faulty tensioner)
Often reported
Some versions of the 2.0 TDI in the A6 C7 use an oil-bath timing belt and tensioners that can cause abnormal noises, timing deviations, or require early replacement if faulty or worn.
Engine Internal
Diesel Particulate Filter (DPF) Clogging
Often reported
The DPF tends to clog, especially in vehicles used in city driving or short trips that do not cover enough distance to complete thermal regeneration.
Exhaust Emissions
Turbocharger and injection system issues
Often reported
Turbocharger failures (actuator, oil starvation, reduced response) and injection system components are reported to cause power loss or rough running.
What should I look for when buying an Audi A6 2.0 TDI?+
When buying a 2015 model 2.0 TDI, check the service history, test drive, and engine/transmission warnings. The most commonly reported issues are: water pump / plastic cooling component failures; carbon buildup and EGR failure; oil leaks from gaskets and valve cover.
What are the chronic problems of the Audi A6 2.0 TDI?+
The most commonly reported issues are: water pump / plastic cooling component failures; carbon buildup and EGR failure; oil leaks from gaskets and valve cover.
Is the Audi A6 2.0 TDI reliable?+
Instead of a simple yes/no, it is necessary to evaluate the proven pros and cons together. This page lists 6 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from Difetti fault database records; brand, fuel, engine, and generation compatibility between the source vehicle and target vehicle is verified. Topics with insufficient evidence are not shown.