Audi VW B5 1.8 1.8T Cylinder Head AEB AJQ ALQ ADR ARG 058103373D 06A103351L 910025 910029 PASSAT GOLF

Product NO.

ML NO.	OEM NO.	REF NO.
MLG002	058103373D 058103351G 058103353R	910025
MLG003	06A103351L 06A103351J 06A103351G	910029

Product Information Cylinder Head

Basic Description

Field	Detail
OEM Part Number	058103373D
Product Name	Cylinder Head – VW/Audi 1.8L 20V DOHC Engine
Material	Cast Aluminum Alloy
Engine Type	Inline-4, 1.8L, 20-Valve, DOHC
Aspiration	Turbocharged / Naturally Aspirated (varies by engine code)
Valves per Cylinder	5 (3 intake + 2 exhaust, total 20 valves)
Camshaft Configuration	Double Overhead Camshaft (DOHC)
Cooling System	Water-cooled
Fuel Type	Gasoline / Petrol
Surface Finish	CNC-machined, pressure-tested
VVT Compatibility	Some versions (depending on application)

Applications (Engine Compatibility)

Engine Code	Type	Notes
AEB	1.8L Turbo	Early 1.8T, no VVT
AJL	1.8L Turbo	Similar to AEB but with VVT
ANB	1.8L Turbo	Later version, VVT equipped
AWT	1.8L Turbo	Late 1.8T with electronic throttle
ADR / ARG	1.8L NA	May share head casting (non-turbo)

Note: Always verify fitment via engine code and cylinder head design. The 058103373D is commonly linked with AEB and compatible 20V turbo engines, often seen in:

Audi A4 (B5)
VW Passat (B5)
Skoda Superb (1st gen)
Seat models with 1.8T

Package Options

Package Type	Description
Bare Head	No camshaft, no valves
Semi-assembled	Includes guides and seats
Fully Assembled	With valves, springs, retainers, seals, and camshafts (optional)

Quality & Testing

ISO/TS 16949 certified production line

100% pressure leak tested

Precision-machined sealing surfaces

Compatible with OEM timing and valve components

Volkswagen Engine Overview

Platform Information

Model: Volkswagen Passat B5
Production Years: 1996 – 2005 (including B5.5 facelift)
Engine Configuration: 1.8L inline-4
Engine Mounting: Longitudinal front-mounted
Drivetrain: FWD / 4Motion AWD (some variants)

Main Engine Codes for VW Passat B5 (1.8L)

Engine Code	Type	Turbo	Displacement	Power Output	Valves	Notes
ADR	Naturally Aspirated	NO	1.8L	92 kW / 125 PS	20V	5-valve design, NA configuration
ARG	Naturally Aspirated	NO	1.8L	92 kW / 125 PS	20V	Similar to ADR, different throttle
AEB	Turbocharged	YES	1.8L	110 kW / 150 PS	20V	Early 1.8T, no VVT
ANB	Turbocharged	YES	1.8L	110 kW / 150 PS	20V	Updated AEB with VVT
APU	Turbocharged	YES	1.8L	110 kW / 150 PS	20V	Similar to ANB, minor revisions
AJL	Turbocharged	YES	1.8L	110 kW / 150 PS	20V	Used in quattro (AWD) versions
AWT	Turbocharged	YES	1.8L	110 kW / 150 PS	20V	Late model with VVT, electronic throttle

Technical Specifications (Based on AEB/AWT typical models)

Specification	Value
Displacement	1781 cc (1.8L)
Engine Structure	Inline 4-cylinder, cast iron block + aluminum head
Valve Train	DOHC, 5 valves per cylinder (20V total)
Compression Ratio	9.5:1 (turbo) / 10.3:1 (NA)
Fuel System	Multi-point injection (MPI) / EFI
Turbocharger	K03 Series (e.g., K03-052)
Cooling System	Water-cooled
Ignition	Coil-on-plug or single coil (depending on model year)
ECU	BOSCH ME 3.8 / ME 7.5 (varies by model)

Applicable Vehicles (B5 Platform)

Brand	Model	Production Years	Engine Codes
VW	Passat B5	1996–2000	AEB, ADR, ARG
VW	Passat B5.5	2001–2005	APU, ANB, AJL, AWT
Audi	A4 B5	1995–2001	AEB, AJL, ADR
Skoda	Superb I	2001–2008	AWT, ALZ, ARG (varies)

Cylinder Head Structure Overview

All 1.8L engines used in Passat B5 (NA or Turbocharged) share the 5-valve-per-cylinder layout:
→ 3 intake + 2 exhaust valves per cylinder (total 20 valves).
Cylinder head material: Cast aluminum alloy
Equipped with heat-resistant valve seats
VVT (Variable Valve Timing) is featured in later models (e.g., AWT, ANB)
Early models (e.g., AEB) have no VVT but excellent airflow design, popular in tuning communities