Frequently asked questions
A remanufactured turbocharger for the AUDI S7 4.0 TFSI 450 CV starts at €1188.00. This engine takes 2 different references: the price shown is the lowest, the others varying by supplier or production period.
The references are 9VA17, 9VA18. They are what settle the match on a AUDI Sportback (4GA / 4GF) with the 4.0 TFSI 450 CV engine — not the vehicle's trade name, nor its year.
Because this engine was built with several turbochargers depending on the production period or the original supplier. Each reference matches a precise variant; the code read on the removed part settles which one fits.
It is on the riveted plate of the centre housing, on the compressor side. The plate holds the marking even on a part coated with oil and soot. It is the only reading that confirms the match with 9VA17.
Part 9VA17 is sold as an exchange unit: it has already been remanufactured and balanced, and the turbocharger you remove goes back into the reconditioning circuit. Return terms are stated at checkout.
An exchange turbocharger is an original part restored to working order: wear parts are replaced and the rotating assembly is rebalanced. It carries the same reference, 9VA17, and fits in place of the part removed.
No: it matches Sportback (4GA / 4GF) models fitted with the 4.0 TFSI 450 CV engine. A Sportback (4GA / 4GF) running on diesel, or at a different petrol power output, takes another reference.
No. Two S7 of the same year can take different turbochargers depending on their engine. It is the engine-and-power pairing — here 4.0 TFSI 450 CV — that determines the reference, and the code on the removed part that confirms it.
On this petrol engine, a turbocharger nearing the end of its life shows up as a loss of power under acceleration, smoke at the exhaust, a whistle rising with engine speed and a drop into limp mode. These signs overlap with other intake faults: diagnosis is a job for a qualified technician.
On this 4.0 TFSI 450 CV, the ECU limits the engine when it no longer finds the boost pressure expected for the 450 CV rated output. A turbocharger that no longer regulates pressure correctly is one possible cause, alongside an air leak or a faulty pressure sensor.
On this 4.0 TFSI 450 CV petrol engine, blue smoke means oil is passing, as on a diesel — turbocharger sealing is one candidate among other parts; white smoke points instead to an ignition fault, specific to petrol engines. Colour guides the diagnosis, it does not replace it.
No. The whistle can come from the turbocharger itself, but equally from a leak on an intake hose, the intercooler or the wastegate. Noise alone is not enough to condemn the part.
That depends on the reference fitted from the factory: a twin-scroll turbocharger separates the exhaust flows to limit interference between cylinders, an architecture more common on sporting petrol engines. The listing for reference 9VA17 states the architecture used on this 4.0 TFSI 450 CV.
By a fault code read and a boost pressure check, carried out by a qualified technician, before any order of reference 9VA17. That check separates a failed turbocharger from an air leak or a faulty sensor — three faults with similar symptoms but different remedies.
Yes: reference 9VA17 is the original fitment for an AUDI Sportback (4GA / 4GF) with the 4.0 TFSI 450 CV engine. It keeps the dimensions, the mounting and the connections of the part removed. Fitting is a job for a qualified automotive technician.