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BAM

1.8 T 20v 225 hp quattro (BAM, 1999-2006) engine: faults and reliability

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

With caution

Among the 225 hp Audi TT owner reports collected by Fiches-auto.fr there are several mentions of ignition coils, the air mass meter and abnormal oil consumption (one case at 146,000 km); these are the same weak points as on the lower-power versions, and the sources consulted do not indicate that this version is more prone to them.[1]

Years
1999–2006
Power
225 hp
Faults that affect it
4
1 of high or critical severity
Cars that use it
2
in our database

5 sourcesHow we work

What changes in this version

165 kW (225 hp) at 5,900 rpm and 280 Nm between 2,200 and 5,500 rpm, with a K04 turbo and double intercooler. Reserved for the all-wheel-drive versions: Audi TT quattro and Seat León Cupra R (phase 2, from May 2003 to June 2006).[2][3]

Engine codes of this version: BAM.

Faults of the BAM 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. 3Low 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.
  4. 4Low 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 BAM engine

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

Audi

Seat

Frequently asked questions

Is the BAM engine reliable?

Our verdict is “With caution”. Among the 225 hp Audi TT owner reports collected by Fiches-auto.fr there are several mentions of ignition coils, the air mass meter and abnormal oil consumption (one case at 146,000 km); these are the same weak points as on the lower-power versions, and the sources consulted do not indicate that this version is more prone to them.[1]

What faults does the BAM engine have?

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

Which cars use the BAM engine?

Audi TT I (1998–2006) and Seat León I (1999–2006).[1][2][3][4][5]

Are you buying a car with the BAM 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. Audi TTWikipedia · Other source · consulted 27 September 2026
  3. SEAT LeónWikipedia · Other source · consulted 27 September 2026
  4. Fiabilité et pannes Seat LeónFiches-auto.fr · Other source · consulted 27 September 2026 · in French
  5. Seat Leon Mk1: Probleme, Schwachstellen, ErfahrungenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German