Turbocharger KKK Borgwarner original 53039880052 K03S A3, Golf IV, Skoda, Beetle1.8T

Scope of delivery:

• 1x Original BorgWarner KKK upgrade turbocharger K03S (Part Number: 53039880052) – specifically for 1.8T transverse engines

Technical specifications:

• Cooling system: Efficient oil- and water-cooled for maximum durability under thermal load

• Boost pressure control: With integrated, internal wastegate (including pre-set turbo actuator)

• Performance focus: The legendary K03S (K03-052) with enlarged compressor wheel – the ideal plug-and-play upgrade for 1.8T engines to achieve reliable power outputs of up to approx. 215–225 hp.

Use in the tuning scene:

• The ultimate 1.8T OEM upgrade: In the VAG tuning scene, the K03S turbocharger for the 1.8T transverse engine is the ultimate all-purpose solution. It serves as a direct, mechanical plug-and-play upgrade for older 150-hp engines (such as the AGU) to noticeably and extremely agilely increase power via ECU remapping (Stage 2) without extensive exhaust manifold or downpipe modifications.

• Legendary responsiveness: Due to its extremely early spool-up (boost pressure often building well below 2000 rpm), the K03S is extremely popular for everyday driving and winding country roads. It offers a sharp response that larger upgrade turbochargers in this segment cannot achieve.

• Popular for small-bore conversions: Beyond the Golf platform, this turbocharger is extremely popular in the custom scene for "small-displacement engines." In conversions of classic VW Polo G40 engines or old Fiat turbo engines, it delivers exactly the right air mass for an extremely wide, drivable rpm range.

Suitable for (VAG 1.8T transverse engines):

• Audi A3 1.8T (8L): 180 hp models with engine codes APP, AUQ

• Audi TT 1.8T (8N): 180 hp / 190 hp models with engine codes AUM, AUQ, ARY, BVP

• Seat Ibiza 1.8T (6K / 6L): Cupra & Cupra R with engine codes AQX, AYP

• VW Golf IV 1.8T & Bora: 150 hp / 180 hp models with engine codes AGU, JAE, AWP, AUM, AWU, AWV, BKF, BNU

• Universally applicable: Thanks to its quick response, it is also ideally suited for custom turbo conversions with displacements up to 1.8 liters (e.g. VW Polo G40 Turbo, Fiat Uno/Punto Turbo, etc.).