Question 1

How much is a turbocharger for an AUDI A4 1.9 TDI 116 hp?

Accepted Answer

A remanufactured turbocharger for the AUDI A4 1.9 TDI 116 hp starts at €266.00. This engine takes 3 different references: the price shown is the lowest, the others varying by supplier or production period.

Question 2

Which turbocharger reference fits the 1.9 TDI 116 hp?

Accepted Answer

The references are 454231-5012S, 454231-5013S, 5303 988 0193. They are what settle the match on a AUDI A4 (B6) with the 1.9 TDI 116 hp engine — not the vehicle's trade name, nor its year.

Question 3

Why are several references offered for the 1.9 TDI 116 hp?

Accepted Answer

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.

Question 4

Where is the reference found on a turbocharger removed from an A4 (B6)?

Accepted Answer

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 454231-5012S.

Question 5

What happens to the old turbocharger from an AUDI A4 1.9 TDI 116 hp?

Accepted Answer

Part 454231-5012S 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.

Question 6

How does exchange turbocharger 454231-5012S differ from a new part?

Accepted Answer

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, 454231-5012S, and fits in place of the part removed.

Question 7

Does turbocharger 454231-5012S fit every A4 (B6)?

Accepted Answer

No: it matches A4 (B6) models fitted with the 1.9 TDI 116 hp engine. A A4 (B6) running on petrol, or at a different diesel power output, takes another reference.

Question 8

Is the year of my A4 enough to choose the turbocharger?

Accepted Answer

No. Two A4 of the same year can take different turbochargers depending on their engine. It is the engine-and-power pairing — here 1.9 TDI 116 hp — that determines the reference, and the code on the removed part that confirms it.

Question 9

How do I spot a worn turbocharger on an A4 1.9 TDI 116 hp?

Accepted Answer

On this diesel 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.

Question 10

Why does my A4 1.9 TDI 116 hp go into limp mode?

Accepted Answer

On this 1.9 TDI 116 hp, the ECU limits the engine when it no longer finds the boost pressure expected for the 116 hp rated output. A turbocharger that no longer regulates pressure correctly is one possible cause, alongside an air leak or a faulty pressure sensor.

Question 11

What does exhaust smoke mean on a 1.9 TDI 116 hp?

Accepted Answer

On this 1.9 TDI 116 hp diesel engine, blue smoke means oil is passing — turbocharger sealing is one candidate among other parts; black smoke means an over-rich burn, so a lack of air at the intake. Colour guides the diagnosis, it does not replace it.

Question 12

Does a whistle under acceleration always come from the turbocharger?

Accepted Answer

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.

Question 13

Is the turbocharger on the 1.9 TDI 116 hp a variable-geometry unit?

Accepted Answer

Yes. This diesel engine takes a variable-geometry turbocharger, whose movable vanes adapt boost to engine speed. It is the part that seizes most often on this type of engine, and it is among what is restored on reference 454231-5012S.

Question 14

How do I confirm the fault before ordering turbocharger 454231-5012S?

Accepted Answer

By a fault code read and a boost pressure check, carried out by a qualified technician, before any order of reference 454231-5012S. That check separates a failed turbocharger from an air leak or a faulty sensor — three faults with similar symptoms but different remedies.

Question 15

Does turbocharger 454231-5012S fit straight onto a 1.9 TDI 116 hp?

Accepted Answer

Yes: reference 454231-5012S is the original fitment for an AUDI A4 (B6) with the 1.9 TDI 116 hp engine. It keeps the dimensions, the mounting and the connections of the part removed. Fitting is a job for a qualified automotive technician.

Turbo Garrett 753420-5006S

Injector SIEMENS-VDO 5WS40536

High-pressure pump SIEMENS-VDO 5WS40019

Turbocharger AUDI A4 (B6) 1.9 TDI 116 hp

Available products

SL Turbo 454231-5012S

SL Turbo 454231-5013S

Turbo BorgWarner - KKK 5303 988 0193

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