Positioning:
The 2002 Audi TT solidified Audi's reputation for distinctive design and sporty performance in the compact luxury sports coupe segment.
Competitors:
Competed with vehicles like the BMW Z3, Porsche Boxster, Mercedes-Benz SLK, and Chevrolet Corvette.
Design Philosophy:
Iconic Bauhaus-inspired 'bubble' design, available in Coupe and Roadster variants, front-wheel or Quattro all-wheel drive.
Software Advantage:
Online accessibility provides up-to-date information and convenience compared to traditional print manuals.
Engine:
1.8L Turbocharged (AGU, AUM, APX, BAM)
Drivetrain:
Front-Wheel Drive (FWD) and Quattro All-Wheel Drive (AWD)
Suspension Steering:
Front McPherson Strut, Rear Multi-Link, Power Steering
Brakes:
Front Ventilated Discs, Rear Solid Discs, ABS, ESP
Electrical Electronics:
Complete Wiring Diagrams, ECU Diagnostics, Lighting, Instrumentation
Heating Air Conditioning:
HVAC System Operation and Repair
Body Chassis:
Body Panels, Doors, Hood, Trunk, Interior Trim
Fuel System:
Fuel pump, injectors, lines, EVAP system.
Exhaust System:
Catalytic converters, mufflers, exhaust manifolds.
Maintenance:
Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks
Repair:
Engine Overhaul, Transmission Rebuild, Brake System Service, Suspension Component Replacement, Electrical System Troubleshooting
Diagnostics:
Troubleshooting Guides, Fault Code Interpretation, Component Testing
Installation:
Component Installation Procedures (e.g., timing belt, clutch)
Troubleshooting Electrical:
Detailed diagnostic trees for common electrical faults, including infotainment and sensor issues.
Engine Rebuild:
Complete specifications for engine disassembly, inspection, and reassembly, including torque values and clearances.
Clutch Replacement:
Step-by-step guide for replacing the clutch assembly and flywheel.
Timing Belt Replacement:
Detailed procedure for timing belt replacement, including tensioner and idler pulley replacement and camshaft/crankshaft timing alignment.
Depth:
Comprehensive factory-level technical information, suitable for DIY enthusiasts and professional technicians.
Engine Type:
Inline-4, 20-valve, DOHC, Turbocharged
Engine Codes Covered:
AGU (180hp FWD), AUM (180hp FWD), APX (225hp Quattro), BAM (225hp Quattro)
Horsepower 180Hp:
178 hp @ 5500-6000 rpm
Torque 180Hp:
199 lb-ft @ 1950-5000 rpm
Horsepower 225Hp:
222 hp @ 5800-6300 rpm
Torque 225Hp:
206 lb-ft @ 2200-4200 rpm (later models 236 lb-ft @ 2300-5000 rpm)
Fuel Delivery:
Sequential Multi-Point Fuel Injection (MPI)
Fuel Type:
Premium Unleaded Gasoline (91 Octane or higher recommended)
ECU Type:
Bosch Motronic ME 7.x
Standard Transmission:
5-Speed Manual (180hp models)
Optional Transmission:
6-Speed Manual (225hp models), 6-Speed Direct-Shift Gearbox (DSG) - Note: DSG was introduced later, 2002 primarily had Manual/Tiptronic
AWD System:
Haldex All-Wheel Drive system on Quattro models.
Manual Transmission Fluid Spec:
G 052 171 A2 (or equivalent API GL-4 rated)
Automatic Transmission Fluid Spec:
G 052 162 A1 (or equivalent ATF Type 3)
NHTSA Front Impact:
4-star driver, 4-star passenger (for coupe)
IIHS Side Impact:
Acceptable (for coupe)
Electronic Stability Program:
ESP (Standard on Quattro, optional on FWD)
Anti Lock Braking System:
ABS (Standard)
Airbags:
Front, Side-Curtain (Coupe)
Rollover Protection:
Pop-up roll bars (Roadster)
Oil Change Interval:
Every 10,000 miles or 1 year, whichever comes first (synthetic oil recommended).
Timing Belt Replacement:
Every 60,000-70,000 miles or 5 years (critical for 1.8T engines).
Engine Oil Spec:
SAE 5W-40, API SN, ACEA A3/B4, VW 502 00 / 505 00
Coolant Spec:
G 12 Plus (Pink) or G 12 EVO (Purple) - Ethylene Glycol based
Coil Packs:
Early ignition coil packs can fail, leading to misfires.
Intake Manifold:
Plastic intake manifold runners can crack over time on some models.
Oil Leaks:
Valve cover gaskets and oil pan gaskets can develop leaks.
Haldex Clutch Service:
Regular fluid and filter changes for the Haldex AWD system are crucial.
