New Audi A3 Turbo – Ref. 06K145721C

What a healthy turbo does for your Audi A3 1.8 TFSI

Behind the wheel of an Audi A3 fitted with the 1.8 TFSI engine, a turbo in perfect condition delivers an immediate, crisp throttle response, smooth power delivery from low revs, and a complete absence of whistling or exhaust smoke. As soon as boost pressure drops or becomes erratic, the car loses its sharpness, the engine runs less smoothly, and fuel consumption rises for no apparent reason. Fitting a new turbo restores all the responsiveness you'd expect from this turbocharged petrol engine.

Compatibility of the turbo for Audi A3 1.8 TFSI

This new turbo is compatible with reference 06K145721C, intended for Audi A3 models powered by the 1.8 TFSI petrol engine, with an engine capacity of 1798 cm³, identified under engine codes CPKA, CPRA, CNSB and CXB. Before placing an order, it is strongly recommended that you check the reference printed on the old turbo fitted to your vehicle, to ensure that the part offered matches your exact engine specification.

Equivalent references

• 06K145721C
• F41CAF-SR050B

Exchange and warranty

This new turbo is sold on an exchange basis: return of the old turbo is required, in accordance with our Terms and Conditions. It is only collected after the new part has been delivered and fitted, so your Audi A3 is not left off the road during the process. The part carries a 12-month parts warranty, subject to fitting by a qualified professional. Payment can be spread over multiple instalments, in up to 10 instalments.

Common causes of failure on the 1.8 TFSI

On this turbocharged petrol engine, turbo lifespan is heavily dependent on lubrication quality: incorrect oil, missed oil-change intervals, or a clogged oil filter all accelerate bearing wear. A saturated air filter, a cracked or fouled intercooler, or driving too hard immediately after a cold start (before the oil has reached its operating temperature) are also common causes of premature failure.

Fitting advice for your A3

Before installing the new turbo, carefully inspect the oil circuit, the intake hoses and the air intake for any contamination or leaks that could damage the part as soon as it is started. It is essential to prime the turbo with oil before the first engine start, to ensure immediate bearing lubrication and prevent any dry running.