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Turbocharger K04-001 for 1.8T engines
The K04-001 turbocharger is designed as an improved variant of the K03-052 and K03-053 turbochargers used in selected Audi, Volkswagen, Seat, and Skoda vehicles with 1.8T engines. Before purchasing, compare the part number of the installed turbocharger and check engine code compatibility.
Compared to the K03-052 and K03-053, it has a larger compressor inlet: 48.7 mm instead of 45 mm. Therefore, modifications to the intake hose may be necessary, and silicone hose may be needed to connect the K04-001 intake.
Application
- Audi A3: AGU, ALN, ARZ engines 110 kW/150 HP, years 1996–2003
- Audi A3: AUQ, ARZ, APP 132 kW/180 HP engines, years 1996–2003
- Audi TT: AUQ engine 132 kW/180 HP, years 1998–2006
- Seat Leon: AJQ, APP, ARY, AUQ engines 132 kW/180 HP, years 1998–2006
- Skoda Octavia: AUQ engine 132 kW/180 HP, years 2001–2005
- Volkswagen Golf, Bora, Jetta: AUQ, ARZ engines, years 2000–2009
- Volkswagen New Beetle: 1.8L-5V engine, 2000–2005
The source also indicates application in the Audi A3, Audi TT, Volkswagen Beetle and Seat Ibiza with the 1.8L engine, and in select vehicles from the years 1996–2009. Fit is not universal.
Technical specifications
- Turbocharger model: K04-001
- Type: individual turbocharger
- Engine: 1.8L-5V
- Engine codes: AJQ, APP, AUM, AUQ, ARY
- Compressor inlet: 48.7 mm
- Compressor outlet: 52 mm
- Cooling: oil and water
- Bearing: sliding bearing/floating bearing
- Thrust bearing: 270°
- Declared power: 162 kW/220 hp
- Turbine wheel: alloy K419
- Compressor wheel: forged aluminum billet, CNC machined
- Turbine housing: silicon-molybdenum alloy steel
- Oil seal: high-speed steel ring
- Finish: matte
OEM/OE numbers
Confirmed OEM/OE numbers and reference numbers provided for this application:
- K04-001
- K03-052
- K03-053
- 53049500001
- 53039700052
- 53039880052
- 53039880094
- 5303-970-0053
- 53039880053
- 53039880058
- 06A145681H
- 06A145702P
- 06A145704S
- 145681
- 145702
- 145704
Important information regarding assembly
Please confirm the original part number before purchasing. Because the K04-001 compressor inlet is 48.7mm, and the K03-052 and K03-053 inlets are 45mm, some applications require intake tract modifications. The manufacturer recommends installation by a qualified technician.
Before installing a new turbocharger, the cause of the damage to the old one must be determined and eliminated, for example insufficient lubrication, a foreign body in the intake system or faulty crankcase ventilation.
Helpful information before purchasing
This K04-001 turbocharger is designed for select 1.8T engines in the Audi A3 and TT, Volkswagen Golf, Bora, Jetta and New Beetle, Seat Leon, and Skoda Octavia. It is specified as an upgraded variant for the K03-052 and K03-053. Please verify your turbocharger number, engine code, model, and vehicle year.The K04-001 intake is 48.7mm, so may require a change or modification to the intake tract compared to the K03.
The most important information
- Turbocharger model: K04-001 for 1.8L-5V engine.
- The compressor inlet is 48.7 mm and the outlet is 52 mm.
- Cooling is oil and water; a slide bearing and a 270° thrust bearing are used.
- The product is indicated as an improvement for K03-052 and K03-053.
- Fitment is not universal and requires part number and engine code verification.
Contents of the set
The scope of accessories is not specified in the text data. You will receive the parts shown in the product image; please verify the scope of delivery before purchasing.
Frequently asked questions
How do I check if a part fits?
Compare the installed turbocharger part number with the ones provided in the listing and verify the make, model, year, and engine code. If replacing a K03-052 or K03-053 with a K04-001, consider the larger 48.7 mm compressor inlet.
Is the product ready for assembly?
The source does not confirm installation without additional modifications. The K04-001 intake may require modifications or alterations to the intake duct, and installation should be performed by a suitably qualified installer.
Does the offer include a complete set?
The range of accessories is not specifically specified in the source data. The offer includes the parts shown in the product image.
Why is it worth buying from Multigenus?
- Ships from European warehouse for selected offers
- Final price within the EU, excluding customs and import surcharges
- 14 days to return in accordance with EU law
- Pre- and post-purchase support
- The product is described in a way that makes it easier to choose the right variant