Skip to content
MotorFiable

AUQ

1.8 T 20v 180 hp (AUQ, 1998-2006) engine: faults and reliability

Volkswagen/Audi 1.8 T 20v turbo (EA113) version

With caution

Audi TT owner reports document turbo failures (at 60,000 and 155,000 km) and water pump failures (replaced at 110,000 km and again at 130,000 km on the same car), as well as several mentions of the air mass meter; the Audi A3 with this engine also has accumulated mentions of the air mass meter and ignition coils.[1][2]

Years
1998–2006
Power
180 hp
Faults that affect it
5
1 of high or critical severity
Cars that use it
6
in our database

10 sourcesHow we work

What changes in this version

132 kW (180 hp) at 5,500 rpm and 235 Nm between 1,950 and 5,000 rpm, with a higher-flow K03 turbo than the 150 hp version. It is the engine of the entry-level sporty versions: Golf IV GTI (from 2001, "25 Jahre GTI" edition), Audi TT, Seat León Cupra, Seat Toledo (2003-2004) and Škoda Octavia RS (from 2001).[3][4][5][6][7]

Engine codes of this version: AUQ.

Faults of the AUQ engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1High severityFrequency: OccasionalTurboTurbo wear and oil consumptionThe 1.8T turbo can fail over time -cases documented on an Audi TT at 60,000 and 155,000 km- and several sources link it to growing oil consumption in the engine itself. It is not the most cited fault, but it is one of the most expensive when it appears.
  2. 2Medium severityFrequency: OccasionalCoolingWater pump failureThe water pump is another documented weak point of the 1.8T: a 180 hp Audi TT had to have it replaced twice, at 110,000 and again at 130,000 km. Coolant leaks "in several places" are also described on a Passat with this engine.Appears at around 110,000 km
  3. 3Medium severityFrequency: OccasionalTimingTiming chain tensioner noise and wearAt least one owner documents the timing chain tensioner of this engine left unreplaced, with the resulting chain noise, on a Passat with 184,000 km; another report from a 180 hp Audi TT points to a timing problem at 90,000 km.
  4. 4Low severityFrequency: CommonIgnitionIgnition coil failureYes: the ignition coils (one per cylinder) are among the most cited faults of the 1.8T, especially on engines built between 2001 and 2003. They cause hesitation, a rough idle and the engine warning light coming on; usually it is enough to replace the coil of the affected cylinder.
  5. 5Low severityFrequency: CommonIntakeAir mass meter (MAF sensor) failureThe air mass meter (MAF sensor) fails fairly often on the 1.8T: on the 150 hp Audi A3 it appears in 3 of the 11 reports collected, and it is also documented on the 180 and 225 hp Audi TT. It causes hesitation and loss of power; it is fixed by replacing the sensor.

Cars fitted with the AUQ engine

Open each car to see all its faults with this engine and what to check before buying it.

Audi

Seat

Škoda

Volkswagen

Frequently asked questions

Is the AUQ engine reliable?

Our verdict is “With caution”. Audi TT owner reports document turbo failures (at 60,000 and 155,000 km) and water pump failures (replaced at 110,000 km and again at 130,000 km on the same car), as well as several mentions of the air mass meter; the Audi A3 with this engine also has accumulated mentions of the air mass meter and ignition coils.[1][2]

What faults does the AUQ engine have?

The documented ones that affect this version, by importance: turbo wear and oil consumption (high severity), water pump failure (medium severity), timing chain tensioner noise and wear (medium severity), ignition coil failure (low severity) and air mass meter (MAF sensor) failure (low severity).

Which cars use the AUQ engine?

Volkswagen Golf IV (1997–2003), Audi A3 I (1996–2003), Audi TT I (1998–2006), Seat León I (1999–2006), Seat Toledo II (2003–2004) and Škoda Octavia I (2001–2005).[1][2][3][4][5][6][7][8][9][10]

Are you buying a car with the AUQ engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Fiabilité et pannes Audi TTFiches-auto.fr · Other source · consulted 27 September 2026 · in French
  2. Fiabilité et pannes Audi A3Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
  3. List of Volkswagen Group petrol enginesWikipedia · Other source · consulted 27 September 2026
  4. Volkswagen Golf IVWikipedia · Other source · consulted 27 September 2026 · in Spanish
  5. SEAT LeónWikipedia · Other source · consulted 27 September 2026
  6. SEAT ToledoWikipedia · Other source · consulted 27 September 2026
  7. Škoda OctaviaWikipedia · Other source · consulted 27 September 2026
  8. Audi TTWikipedia · Other source · consulted 27 September 2026
  9. Fiabilité et pannes Seat LeónFiches-auto.fr · Other source · consulted 27 September 2026 · in French
  10. Seat Leon Mk1: Probleme, Schwachstellen, ErfahrungenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German