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B9 Sedan · Avant

Audi A4 · Sedan · Avant · 2016–

MLB Evo A4/S4 with the 3.0 V6 turbo.

Production run

2016–now

Engines covered

4

Avg. part price

—

19902026

Interactive systems map

Inspect the B9

Tap a hotspot to inspect that system

Systems map

Where it goes wrong

Each numbered hotspot counts the documented failure points in that area. Select one to see the specifics for this chassis and engine.

Failure points by system

Engine3

Cooling2

Intake2

Fuel1

Exhaust2

Documented issues per engine

5

EA888

4

EA839

5

2.0 TDI

5

3.0 TDI

Known weak points

What breaks on the B9

Gen1/2 oil consumption (piston rings)Diagnose →Timing chain tensioner (Gen2)Diagnose →Coolant thermostat housingDiagnose →Carbon buildupDiagnose →PD injector loom and cam wear (PD era)Diagnose →DPF cloggingDiagnose →Swirl flap motorDiagnose →EGR coolerDiagnose →

Guides & playbooks

B9 playbooks

Maintenance scheduleGive me a mileage-based maintenance schedule for a Audi A4 B9, including the items the factory schedule skips.Buyer's inspectionI'm inspecting a used Audi A4 B9. What exactly should I check, test drive and look for underneath?Build planPlan a staged performance build for a Audi A4 B9 that stays reliable as a daily driver.Fault code lookupI have a fault code on my Audi A4 B9. Walk me through what it means and how to confirm the cause.

Fits your B9

Parts & tools

Full catalog & export

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