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Audi A4 40 TFSI Pro Line common faults.

2019–2024, saloon, petrol, 204 HP.

The fault list covers: DMSA engine, DL382 transmission.

What you save stays on this device only. My saves

3 fault write-ups. 2 important. 10 recalls.

If you know the year, pick it. Faults for other years drop out of the list.

Before you buy

Known faults

2 important faults

expensive2

The most common source of faults on the longitudinal 7 speed S tronic that replaced the DL501 (0CJ / 0CK / 0CL) is the mechatronics unit as well. Typical faults are the input or turbine speed sensor (which makes the shifting unpredictable), clutch slip under load, and abnormal operation of the park lock.

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Servicing is a separate trap: because of the way the gearbox is built, this type uses up to three separate oil chambers and three filters. An incomplete oil change looks done at a glance, but the effect is missing.

between 60,000 and 100,000 km

What to check

  • Standing still, shift between D and R and watch the engagement: binding, a jolt or a delay is suspect
  • A jolt on the 1 to 2 shift is the most common early sign; try it cold and warm
  • Under load (a slope, an overtake) watch for the revs flaring, looking for clutch slip
2 more steps in the write-up

The combined housing of the water pump and the thermostat is plastic, and it is bolted directly to the hot engine block. The many heat and cool cycles warp it, it becomes brittle, and then it develops a hairline crack: the fault is almost always the housing, not the pump itself. The signs are slowly disappearing coolant with no visible puddle, the coolant level light, a sweet smell from the engine bay, and later a pink stain under the car. The repair means replacing the pump and the housing together, and the intake manifold has to come off for it: 4 to 6 hours of work. It shows up on model years 2015 to 2025.

What to check

  • Check the level in the expansion tank, and ask whether it needs topping up
  • With a cold engine, smell the engine bay: a sweet smell means a coolant leak
  • Shine a light under the intake manifold, on the right side of the engine: dried or pinkish deposits
2 more steps in the write-up

comfort1

On the infotainment of the B9 platform (A4 B9, A5 F5, Q5 FY) the most common complaint is a black screen, a unit that restarts on its own, and a boot that stops partway. A significant part of these are software in origin, not a hardware fault: an update installed at a franchised dealer resolves it.

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The buttons of the control interface form a separate branch: a control panel damaged by water ingress or a spilled drink does not respond, and that is a parts replacement. On early cars small electrical faults are common too: intermittent dropouts of the central locking, the parking sensors and the phone connection.

What to check

  • After switching the ignition on, wait for the full boot: a screen that stops or stays black is a clear sign
  • Press every button on the central control panel and turn the rotary knob: all of them must respond
  • Try the reversing camera, the audio system and phone pairing too
2 more steps in the write-up

Checklist

Audi A4 40 TFSI Pro Line

First what you would check on any car. Then the faults of this model.

Before you buy

Checklist

The printed sheet starts with what you would check on any car. What you tick stays on this device only.

On every car

Ask the owner

vinkodex.com · Before you buy it, see what can go wrong.

Official recall10 recallsShow

The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done.

Most recent: 5 May 2021

A12/00863/21Safety recallInjuries5 May 2021 · EU Safety Gate

Due to discrepancy in the dashboard manufacturing process, the front passenger airbag may fail to deploy optimally. This could impair its protective function, increasing the risk of injury in the event of an accident.

Remedy: Type of economic operator taking notified measure(s): Importer Category of measure(s): Recall of the product from end users Date of entry into force: 05/05/2021

We could not check this: model year. The authority's notice

A12/01220/21Safety recallEnvironment23 April 2021 · EU Safety Gate

The vehicles are equipped with control software regarded as unauthorised by the competent authorities. The product does not comply with the requirements laid down in the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Importer Category of measure(s): Recall of the product from end users Date of entry into force: 23/04/2021

We could not check this: model year. The authority's notice

A12/00504/22Safety recallInjuriesno date · EU Safety Gate

Alteration of the rear axle’s toe and/or camber values lead to increased and uneven wear on the rear tyres, and if worn down to its carcass may suffer a sudden loss of pressure. This can lead to loss of traction and may affect vehicle handling, increasing the risk of an accident. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

A12/00689/20Safety recallFireno date · EU Safety Gate

Moisture can penetrate into the belt starter generator. This can result in a short circuit, leading to local overheating and increased risk of fire. Due to the permanent power supply of the starter generator, this can occur when the vehicle has already been parked for a while.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

A12/01401/20Safety recallFireno date · EU Safety Gate

Moisture can ingress into the belt starter generator, generating short-circuits. This can lead to local overheating of the component, increasing risk of fire.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

A12/01482/20Safety recallInjuriesno date · EU Safety Gate

The screw connection attaching the seat frame to the seat rail may not be correctly executed. As a result, it may fail in the event of an accident, increasing the risk of injury.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

A12/03031/23Safety recallInjuriesno date · EU Safety Gate

A defective welding seam on the front seat back frame can break in the event of an accident. As a result, the person sitting in the seat may hit their head on the B-pillar, increasing the risk of injury. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

A12/0973/19Safety recallInjuriesno date · EU Safety Gate

A component of the wheel suspension may not be sufficiently strong and could break. As a result, the tyre could be pressed against the wheel arch, potentially causing an accident.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

A12/1516/19Safety recallInjuriesno date · EU Safety Gate

A damaged transistor may have been installed in the airbag control unit. Consequently, it may not properly make contact leading to the passenger airbag not to be triggered in the event of an accident, increasing the risk of injuries.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

INFO/00138/21Safety recallInjuriesno date · EU Safety Gate

The nuts on the eccentric bolt of the rear-axle spring-link control arm may break due to stress corrosion. As a result, the rear axle could move in the wrong direction, in an uncontrollable manner at high speeds.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

We could not check this: model year. The authority's notice

Engine and transmission

DMSA · 2.0 TSI GTI

152 kW (207 HP) · petrol

DL382 · 7-speed S tronic, longitudinal

DSG · 7 speed

Clutcholajfürdős
Torque limit400 Nm
MakerAudi

We built the code from the model and the gear count. The factory sheet does not state it.

Variant data

What is in this version

Factory data

Trim
40 TFSI Pro Line
Body
saloon
Fuel
petrol
Transmission
automatic
Engine size
1984 cc
Power
150 kW (204 HP)
Drive
FWD
Production
2019–2024

Factory service interval

The manufacturer specifies this for this version. Of the mileage and the time, the one that comes first is the one that counts.

  • Air filter

    • 60,000 km or 4 years
  • Cabin (pollen) filter

    • 30,000 km or 2 years
  • Engine oil and oil filter

    • LongLife30,000 km or 2 years(valid only with LongLife-approved oil)
    • 15,000 km or 1 year
  • Brake fluid change

    • first: 3 years, then 2 years(first change at 3 years, then every two years)
  • DSG oil change, WET clutch gearbox

    • 60,000 km or 4 years
  • Coolant (antifreeze) change

    • first: 193,000 km or 10 years, then 97,000 km or 5 years(G13 / G12++: first change at 120,000 miles or 10 years, then every 60,000 miles or 5 years)
  • Spark plugs, petrol

    • 60,000 km or 6 years

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms