Coolant pump or thermostat housing leak leading to overheating
Low coolant warning, pink crusty residue around the front of the engine, sweet smell, or temperature rising in slow traffic.
Should I buy a 2015–2024 Audi A4 Avant B9?
Considering a 2015–2024 Audi A4 Avant B9? This guide explains the problems associated with this model and what to examine when viewing one. Condition, maintenance history and previous repairs matter, so judge the exact car on evidence rather than badge appeal.
At a glance
Generation: B9
We have detailed information drawn from more than 2 billion data points and an extensive list of potential faults for this vehicle. Below is a sample of three. Run a bespoke report by entering your vehicle details to see the full list.
This guide explains the model. Your registration tells the real story.
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Common Audi A4 (2015–2024) problems
Ignition coil or spark plug misfire under load or on cold start
Uneven idle, flashing engine light, hesitation under acceleration, or a bouncy cold start.
Water ingress into footwells or boot from drains or seals
Wet carpet, damp boot lining, musty smell, misted windows, or water appearing after heavy rain.
Audi A4 buying questions
Is a 2015–2024 Audi A4 worth buying?
It can be, but only if the individual car backs it up. For the 2015–2024 Audi A4 Avant B9, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.
What common problems affect the Audi A4 (2015–2024)?
The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.
What should I check before buying an Audi A4?
Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.
A model guide is useful. A report on its registration is better.
The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.
Or enter the vehicle manually