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Turbocharger K04-001 for 1.8T engines
The K04-001 turbocharger with a billet compressor wheel is designed as a retrofit for select K03-052 and K03-053 turbochargers used in 1.8T engines. It features oil and liquid cooling, a plain bearing, and a 270-degree thrust bearing.
Before purchasing, compare the installed turbocharger's part number with the part number and take into account the difference in compressor inlet size. The K04-001 model has an inlet of 48.7 mm, while the K03-052 and K03-053 turbochargers have an inlet of 45 mm. Modification of the intake hose or the use of silicone hose may be necessary.
Application
- Audi A3: AGU, ALN, ARZ engines 110 kW/150 HP, year 1996–2003; AUQ, ARZ, APP engines 132 kW/180 HP, year 1996–2003.
- Audi TT: AUQ 132 kW/180 HP engines, years 1998–2006.
- Volkswagen Beetle: 1.8L-5V engine, 1996–2009.
- Volkswagen Golf, Bora and Jetta: AUQ, ARZ engines, years 2000–2009.
- Volkswagen New Beetle: 1.8L-5V engine, 2000–2005.
- Seat Ibiza: 1.8L-5V engine, 1996–2009.
- 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.
Technical data
| Turbocharger model | K04-001 |
| Type | Single turbocharger |
| Engine | 1.8L-5V |
| Engine codes | AJQ, APP, AUM, AUQ, ARY |
| Compressor inlet | 48.7 mm |
| Compressor outlet | 52 mm |
| Cooling | Oil and liquid |
| Bearing type | Plain/floating bearing |
| Thrust bearing | 270 degrees |
| Power given in the source | 162 kW/220 hp |
| Condition | New |
| Finish | Matte |
Materials and construction
- Turbine housing: silicon-molybdenum alloy steel.
- Turbine wheel: K419 alloy.
- Compression Wheel: CNC milled billet forged aluminum wheel.
- Oil seal: steel sealing ring.
OEM/OE numbers
K04-001, K03-052, K03-053, 53049500001, 53039700052, 53039880052, 53039880094, 5303-970-0053, 53039880053, 53039880058, 06A145681H, 06A145702P, 06A145704S, 145681, 145702, 145704.
Important assembly information
Before purchasing, please confirm the original turbocharger part number. This is a K04-001 upgrade for the K03-052 and K03-053, so some applications may require modifications to the intake manifold. Installation by a qualified technician is recommended. Before installing a new turbocharger, determine and correct the cause of the failure on the previous one, such as insufficient lubrication, a foreign body in the intake system, or a faulty crankcase ventilation system.
Helpful information before purchasing
This product is designed for select Audi, Volkswagen, Seat, and Skoda vehicles with 1.8T engines, and as a retrofit to K03-052 and K03-053 turbochargers. Please confirm fitment by verifying the original part number, engine code, and intake manifold size. The K04-001 has a 48.7mm compressor inlet, so it may require intake modifications instead of the K03 with a 45mm inlet.
The most important information
- Turbocharger model: K04-001.
- The compressor inlet is 48.7 mm and the outlet is 52 mm.
- Cooling is done by oil and liquid.
- A plain/floating bearing and a 270 degree thrust bearing were used.
- This product is designed for select 1.8L-5V engines and is not universal fit.
Contents of the set
The offer includes the parts shown in the product image. Please verify the detailed contents for your chosen variant before purchasing.
Frequently asked questions
How do I check if a part fits?
Compare the original turbocharger number, engine code, vehicle model, and year, and check the intake pipe dimensions. If replacing a K03-052 or K03-053 with a K04-001, you'll need to consider the larger compressor inlet: 48.7mm instead of 45mm.
Is the product ready for assembly?
Installation requires compatibility verification and may require modification of the intake tract. Professional installation and troubleshooting of the previous turbocharger are recommended.
Does the offer include a complete set?
The source does not provide a detailed list of kit components. You will receive the parts shown in the product image; the exact scope should be verified before purchase.
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