Audi A4 Common Faults

50
Fault Reports
27
Solved
18
Model Years
📖 How to Use This Page

Every figure below comes from owner-submitted fault reports for this exact model — not a manufacturer spec sheet. Jump to any section, or scroll through for the full picture before buying or diagnosing a problem.

📊 Data Score 📋 Overview 🔍 Reliability 🗂️ Problem Categories 💰 Repair Costs 💡 Buying Advice 🔧 Full Fault List ❓ FAQ

📊 Audi A4 Data Score

Reliability Score
57/100
Average
Resolution Rate
54%
27 of 50 confirmed fixed
Risk Level
Low
0 serious/critical cases
Maintenance Complexity
High
7 systems affected

📐 The MyCarFault Score blends this model's resolution rate (% of reports with a confirmed fix) and severity mix of its 50 reported cases. It reflects our database only, not a manufacturer or third-party rating.

📋 Most Reported Problems

🗂️ Problem Categories

Which vehicle systems generate the most reports for the Audi A4, based on all 50 cases on this page.

Other
16 (32%)
Engine
15 (30%)
Transmission
6 (12%)
Electrical
6 (12%)
Brakes
3 (6%)
Exhaust
2 (4%)
Suspension
2 (4%)

🛠️ High maintenance complexity — issues span 7 different systems, with an average reported repair cost of $1,493. Models touching fewer systems are generally simpler and cheaper to keep on top of.

⚡ Quick Summary
Fault Reports
50
27 with confirmed fix
Est. Repair Cost
$1,493
avg · $375–$2150 range
Fix Rate
54%
of reported faults solved

Based on 50 driver-submitted reports, common Audi A4 faults include Audi A4 B8 2.0 TDI S-tronic mechatronic fault, Audi A4 2017 Timing chain rattle on cold start, Audi A4 2013 Transmission slipping between gears, Audi A4 2022 CVT transmission shudder and jerking and Audi A4 2014 2.0 TFSI oil consumption piston rings. 27 of these have a confirmed driver-verified fix.

📋 Audi A4 Overview

The Audi A4 has 50 owner-reported faults recorded on MyCarFault. Documented issues include Audi A4 B8 2.0 TDI S-tronic mechatronic fault, Audi A4 2017 Timing chain rattle on cold start, Audi A4 2013 Transmission slipping between gears, Audi A4 2022 CVT transmission shudder and jerking, and Audi A4 2014 2.0 TFSI oil consumption piston rings.

54% of reported issues have a confirmed driver-verified fix.

Estimated repair costs based on owner-reported data range from $375 to $2150, with an average of $1,493 USD. Costs vary by fault type, garage type, and parts availability in your region.

With 50 reported faults, Audi A4 owners should factor maintenance planning into their ownership budget. Regular servicing and early diagnosis of known issues significantly reduces long-term costs.

🔍 Reliability Snapshot

Fault Reports
50
Verified Fixes
27
Est. Repair Cost
$1,493
Most Common Issue
Audi A4 B8 2.0 TDI S-tronic mechatronic …
Owner Confidence
Moderate

💰 Repair Cost Insight

Based on 50 owner-reported Audi A4 fault cases where cost data was provided:

Average Cost
$1,493
Lowest Estimate
$375
Highest Estimate
$2,150

Estimates are owner-reported and vary by region, garage type, and parts availability. Independent specialists typically charge 30–50% less than main dealers for the same repair.

💡 Should You Buy a Used Audi A4?

Reports on File
50
Resolution Rate
54%
Most-Affected System
Other
Risk Level
Low

Thinking about buying a used Audi A4? Here is what our fault data suggests.

The Audi A4 has a significant number of community-reported faults. This does not necessarily mean the car is unreliable — high fault counts often reflect high ownership numbers. Focus on whether the known issues on this page have been addressed on the specific car you are viewing.

The most reported issue is "Audi A4 B8 2.0 TDI S-tronic mechatronic fault". Ask the seller specifically about this before committing to a purchase, and have an independent mechanic check for it during a pre-purchase inspection.

An independent pre-purchase inspection (PPI) is strongly recommended regardless of the seller's assurances or the car's service history.

❓ Common Questions About the Audi A4

YEAR: All 2022 2021 2020 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2006 2005 2001 1994

🔧 Reported Faults


🟢
Audi A4 B8 2.0 TDI S-tronic mechatronic fault
2010
62 fixes
👁 16,722
🟢
Audi A4 2017 Timing chain rattle on cold start
2017 💰 $800–$3500 USD
1 fix
👁 2,188
🟢
Audi A4 2013 Transmission slipping between gears
2013
1 fix
👁 2,133
🟢
Audi A4 2022 CVT transmission shudder and jerking
2022 💰 $150–$4000 USD
1 fix
👁 2,032
🟢
Audi A4 2014 2.0 TFSI oil consumption piston rings
2014
1 fix
👁 1,891
🟢
Audi A4 2014 Transmission slipping between gears
2014
1 fix
👁 1,772
🟢
Audi A4 2014 Check engine light P0171 lean mixture
P0171 2014
1 fix
👁 1,550
🟢
Audi A4 2018 CVT transmission shudder and jerking
2018 💰 $150–$4000 USD
1 fix
👁 1,343
🟢
Audi A4 2017 Engine oil leak from valve cover
2017
1 fix
👁 1,301
🟢
Audi A4 2014 Brake pads worn squealing noise
2014 💰 $150–$600 USD
1 fix
👁 1,190
🟢
Audi A4 2022 Transmission slipping between gears
2022
1 fix
👁 1,142
🟢
Audi A4 2014 Battery draining overnight parasitic drain
2014
1 fix
👁 920
🟢
Audi A4 2018 ABS warning light on
2018
1 fix
👁 859
🟢
Audi A4 2017 MMI screen flickering
2017
1 fix
👁 847
🟢
Audi A4 2013 Engine oil leak from valve cover
2013
1 fix
👁 827
🟢
Audi A4 2018 Exhaust rattle noise from underneath
2018
1 fix
👁 774
🟢
Audi A4 2013 Timing chain rattle on cold start
2013 💰 $800–$3500 USD
1 fix
👁 740
🟢
Audi A4 2018 Car wont start clicking sound
2018
1 fix
👁 723
🟢
Audi A4 2017 Front suspension clunking over bumps
2017 💰 $150–$1200 USD
1 fix
👁 688
🟢
Audi A4 2017 Coolant leak from engine area
2017
1 fix
👁 685
🟢
Audi A4 2012 Coolant leak from engine area
2012
1 fix
👁 669
🟢
Audi A4 2013 CVT transmission shudder and jerking
2013 💰 $150–$4000 USD
1 fix
👁 645
🟢
Audi A4 2022 AC not blowing cold air compressor issue
2022
1 fix
👁 570
🟢
Audi A4 2012 Engine oil leak from valve cover
2012
1 fix
👁 527
🟢
Audi A4 2022 Coolant leak from engine area
2022
1 fix
👁 389
🟢
Audi A4 2012 Exhaust rattle noise from underneath
2012
1 fix
👁 372
🟢
Audi A4 2012 Brake pads worn squealing noise
2012 💰 $150–$600 USD
1 fix
👁 372
Audi A4 B9 35 TDI Avant Long Term Economy Diesel
2015 Medium
👁 36
Audi A4 ABS Warning — Reluctor Ring Damage
2001 Medium
👁 14
Audi A4 2.0 TFSI White Smoke On Cold Start — PCV
2005 Medium
👁 13
Audi A3 8Y 2.0 TDI DSG EGR Combined Service
2020 Medium
👁 11
Audi A4 Battery Drain — Telephone Module
2001 Medium
👁 11
Audi Q8 e-tron 55 Heat Pump Fault
2022 Medium
👁 10
Audi TT Mk2 8J 2.0 TFSI Timing Chain Tensioner
2006 High
👁 10
Audi A4 2.0 TDI Timing Belt Replacement Cost Guide
2001 High
👁 10
Audi A4 A5 Q5 2.0 TFSI Gen3 EA888 Timing Chain
2016 Medium
👁 9
Audi A4 2.0 TDI Crank Sensor Wiring Harness Damage
2005 Medium
👁 9
Audi A4 Engine Knocking — 2.0 TFSI HPFP Cam Follower
2005 High
👁 8
Audi RS3 8V 2.5 TFSI Camshaft Follower Wear
2011 High
👁 8
Audi A4 Alternator Failure — Electrical Systems Warning
2008 Medium
👁 8
Audi A4 B9 45 TFSI g-tron CNG System Maintenance
2018 Medium
👁 8
Audi A4 Avant B9 40 TDI S-Tronic Long Term Guide
2015 Medium
👁 8
Audi TT RS 8J 2.5 TFSI Five-Cylinder Cam Follower
2009 High
👁 8
Audi A4 Wont Start — Camshaft Position Sensor Failure
2001 High
👁 8
Audi A4 B8 2.0 TDI 143 Long Term Diesel Estate
2008 Medium
👁 7
Audi A4 Overheating — Coolant Loss Through Expansion Tank Crack
2001 Medium
👁 7
Audi Q3 F3 45 TFSI Haldex quattro Service
2018 Medium
👁 7
Audi A4 quattro Transfer Case Fluid Thickening Cold Start
2008 Low
👁 7
Audi A4 B8 Suspension Clunk — Front Lower Control Arm Bush
2008 Medium
👁 6
Audi A4 2.0 TDI Ticking Top End — Hydraulic Lifters
2008 Low
👁 6

🚗 Drivers Also Viewed

Audi A3 59 faults → Audi A6 48 faults → Audi Q5 33 faults → Audi Q7 31 faults → Audi TT 25 faults →

Own a Audi A4?

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🩺 Common Symptoms
Automatic transmission slipping between gears CVT shudder at 35–45 mph Engine oil leak from valve cover Coolant leak from engine area Timing chain rattle on cold start Brake pads worn — squealing noise
🔢 Common OBD Codes
P0171
🔧
Usta
● Online