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Audi A3 30 TFSI Advanced edition common faults.

2020–2024, saloon, petrol, 110 HP.

The fault list covers: DLAA engine, DQ381 transmission.

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5 fault write-ups. 2 important. No recall on the list.

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

DQ381 (7 speed wet DSG): mechatronics and clutch position sensor

expensive

The 7 speed, wet clutch DSG that replaced the DQ250 in the MQB models (0GC / DQ381) is vulnerable from the mechatronics side. Typical faults are a harsh 2 to 3 shift, delayed D/R engagement and limp mode; a fault in the clutch position sensors gives a separate group of codes.

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The wet clutch is more durable than the dry one, but as it wears you get shuddering and slipping when pulling away: the revs flare and the acceleration does not follow.

What to check

  • Standing still on the brake, shift between D and R and watch the engagement time and any jolt
  • Try pulling away on a slope too: shuddering, or revving without pulling, points to clutch wear
  • On the test drive watch the 2 to 3 shift specifically, cold and warm
2 more steps in the write-up

EA211 (1.0 to 1.5 TSI): water pump and thermostat module leak

expensive

In the EA211 the water pump and the thermostat are one plastic module, and the pump is driven not by the timing belt but by a separate toothed belt behind the exhaust camshaft. There are usually two problems with it: the plastic housing warps or cracks (slow coolant loss, a sweet smell, rising temperature), or the drive belt ages (a chirping noise, then an engine left with no cooling). The housing is particularly sensitive if oil reaches it: for example from a leaking crankcase ventilation. The module has to be replaced whole: dismantling it warps it in itself.

What to check

  • Check the level in the expansion tank, and ask whether it needs topping up
  • After a cold start smell the engine bay: a sweet smell means coolant
  • Look for dried, whitish pink deposits on the exhaust side of the cylinder head
2 more steps in the write-up

comfort1

MIB3 infotainment: freezing, restarting, black screen

comfort

On the MQB evo generation the MIB3 touchscreen freezes, restarts on its own, and sometimes stays black. In the What Car? survey, 59 per cent of 8Y A3 owners reported a fault, and 44 per cent of those concerned the infotainment. Volume and temperature are set on touch sliders instead of physical buttons, and if the system hangs you cannot adjust them while driving either.

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The maker released several software updates. Many cases are resolved by them, but not all. The update is free and fault finding is not, so before you buy, check whether the latest version has been installed.

What to check

  • Switch the system on and let it run for at least 10 to 15 minutes during the test drive
  • Try everything: navigation, Bluetooth, phone mirroring, reversing camera, radio
  • Set the volume and the climate with the slider: does it hang, is the response delayed
2 more steps in the write-up

cheap repair2

DSG selector lever: failure of the P position switch

cheap repair

The dash shows "Error: Workshop! Only leave vehicle in position P" with an audible warning. The message appears in whatever language the car is set to, for example "Fehler: Werkstatt! Fahrzeug nur in Stellung P verlassen" in German.

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The message points at the gearbox, but the fault is not there. A tiny switch sits in the module under the selector lever and signals that the lever is in park (P). Its contact wears and can also burn. That makes the signal unreliable, and the car warns you. The fault codes appear as 617752, P173400 or B116229.

At first it is intermittent. Sometimes the message comes up, sometimes not, so a short test drive easily misses it. Later it becomes permanent, and the gearbox can drop into limp mode.

This fault looks more expensive than it is. The maker released a separate retrofit switch kit for it (5Q0713128A for the black module, 3Q0713128 for the white one), which can be fitted in half an hour. The kit costs 70 to 100 pounds. At a franchised dealer, however, the whole selector lever module sometimes gets replaced, which costs 626 to 1,000 pounds there. So the difference between the two routes is roughly tenfold.

The affected group is post 2013 MQB platform Volkswagen, Audi, Seat and Skoda cars with a DSG gearbox. The switch is in these gearboxes, because that is what these cars have in common. The part itself is not part of the gearbox but of the module under the lever.

What to check

  • Watch the dash after starting: the message is intermittent and can be missed on a short loop
  • Move the lever from P to D and back several times, then get out and lock the car
  • Ask whether the selector lever switch has been replaced already, and ask for the invoice
2 more steps in the write-up

TSI ignition coil: misfire, jerking, engine warning light

cheap repair

The per cylinder ignition coil of these direct injection, turbocharged petrol engines fails. According to the Haynes service material this and similar simple electrical faults account for roughly eighty per cent of workshop visits.

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In cold, damp weather, on startup, the engine runs unevenly, misfires under acceleration, and the engine warning light flashes or stays on. Do not keep driving with the light flashing: the unburnt fuel destroys the catalytic converter.

What to check

  • Start with a cold engine and watch the first half minute: a rough idle or shaking is suspect
  • On the test drive load the engine at low revs with a lot of throttle: the misfire shows then
  • A flashing engine warning light calls for stopping immediately
2 more steps in the write-up

Checklist

Audi A3 30 TFSI Advanced edition

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

Faults of this model

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Engine and transmission

DLAA · 1.0 EcoTSI

81 kW (110 HP) · petrol

DQ381 · 7-speed DSG, wet clutch

DSG · 7 speed

Clutchwet
Torque limit420 Nm
MakerVolkswagen

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
30 TFSI Advanced edition
Body
saloon
Fuel
petrol
Transmission
automatic
Engine size
999 cc
Power
81 kW (110 HP)
Drive
FWD
Production
2020–2024

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
All 8Y versions

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