Manual Coverage
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Systems Covered
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Powertrain:
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Engine components (block, head, intake/exhaust, cooling, lubrication), Transmission (manual, automatic, Quattro AWD components), Clutch.
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Chassis:
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Suspension (front, rear), Steering (rack and pinion, power steering), Brakes (front and rear discs, ABS components, hydraulic lines), Wheels and Tires.
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Electrical:
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Battery, starter, alternator, ignition system, lighting (headlights, taillights, interior), instrument cluster, sensors, ECUs, wiring harnesses (by section).
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Body:
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Exterior panels (doors, hood, trunk, fenders), bumpers, trim, glass, seals, interior trim, seats, airbags, HVAC system (components, not full diagnostics).
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Fuelsystem:
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Fuel tanks, pumps, lines, filters, and injectors (parts identification).
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Exhaustsystem:
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Exhaust manifolds, catalytic converters, mufflers, exhaust pipes, hangers, and heat shields (parts identification).
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Coolingsystem:
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Radiator, water pump, thermostat, hoses, expansion tank, and cooling fans (parts identification).
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Lubricationsystem:
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Oil pan, oil pump, oil filter housing, oil cooler (parts identification).
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Climatecontrol:
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A/C compressor, condenser, evaporator, blower motor, HVAC control panel, ducting (parts identification).
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Interiorcomponents:
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Dashboard, center console, door panels, headliner, seat components, floor mats, pedals (parts identification).
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Sensorsandactuators:
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Engine sensors (O2, MAF, MAP, camshaft/crankshaft position), ABS sensors, wheel speed sensors, temperature sensors (parts identification).
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Lightingsystem:
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Headlights, taillights, fog lights, interior dome/courtesy lights, license plate lights, bulbs, housings, and modules (parts identification).
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Procedures Included
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Parts Identification:
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Identification of genuine Audi parts with OEM part numbers.
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Labor Estimation:
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Estimated labor hours for specific repair procedures, crucial for shop quoting and DIY planning.
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Component Breakdown:
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Detailed diagrams showing how assemblies are constructed and which parts belong to them.
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Pricing Information:
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Reference pricing for parts, aiding in budgeting and cost assessment.
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Torque Specifications Reference:
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While not a full repair manual, a comprehensive parts catalog often includes critical torque specifications for key fasteners related to part installation.
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Exploded Diagrams:
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Detailed exploded views of all major assemblies to precisely identify individual parts and their relationships.
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Technical Depth
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Depth:
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Focuses on parts cataloging and labor times, not detailed repair procedures or diagnostic flowcharts. It's a reference for what parts are needed and how long a job *should* take, implying the need for a separate service manual for 'how-to' steps.
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Oe Vs Aftermarket:
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Clearly distinguishes between genuine Audi parts (OEM) and potentially applicable aftermarket equivalents, aiding in sourcing decisions.
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Engine Specifications
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Primary Engine
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Engine Options:
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This catalog will cover multiple engine variants common to the 2003-2006 A4, including the 1.8L Turbocharged Inline-4 (BKB, AMB) and the 2.0L Turbocharged Inline-4 (BGB, BPG, BWT), as well as the 3.0L V6 (ASN, BBK) and potentially the 4.2L V8 for S4 variants (not explicitly stated, but possible in an 'all models' catalog).
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Engine Codes Common:
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1.8T: BFB, BKB, AMB, ALT; 2.0T: BGB, BPG, BWT, BUL; 3.0 V6: ASN, BBK; 4.2 V8 (S4): BBK.
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Performance
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Horsepower Torque Range:
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Ranges vary by engine: 1.8T (approx. 170-190 hp), 2.0T (approx. 200-220 hp), 3.0 V6 (approx. 220-250 hp), 4.2 V8 (approx. 340 hp for S4).
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Fuel System
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Fuel Delivery:
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Multi-point fuel injection (MPI) or FSI (Fuel Stratified Injection) depending on engine code; requires specific fuel pressure regulators, injectors, and fuel pumps.
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically 5,000 to 10,000 miles (or 12 months) depending on driving conditions and oil used, often dictated by the vehicle's service indicator system (LongLife service may extend this).
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Timing Belt Chain:
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1.8T and 2.0T engines use a timing chain (generally maintenance-free for the life of the engine, but tensioners and guides can wear), while the 3.0L V6 uses a timing belt that requires replacement around 105,000 miles.
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Brake Fluid Flush:
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Every 2 years, regardless of mileage.
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Fluid Specifications
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Engine Oil Type:
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API SJ/SL or higher, ACEA A3/B4, specifically meeting VW 502 00 / 505 00 standards. Common viscosity grades: 5W-40 or 0W-40.
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Coolant Type:
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G12 or G12+ pink coolant (Ethylene Glycol based), mixed 50/50 with distilled water.
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Transmission Fluid Type:
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Manual: G 052 172 (or equivalent GL-4/GL-5); Automatic: G 055 025 (or equivalent ATF spec).
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Power Steering Fluid:
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Pentosin CHF 11S or equivalent hydraulic fluid.
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Known Issues
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Pcv System:
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Clogged Positive Crankcase Ventilation (PCV) valve and hoses can lead to oil leaks, increased oil consumption, and rough idling, especially on 1.8T and 2.0T engines.
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Ignition Coils:
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Coil-on-plug ignition coils are prone to failure, causing misfires and rough running. Often requires replacement of all coils as a preventative measure.
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Oil Leaks:
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Leaking valve cover gaskets, oil pan gaskets, and oil filter housings are common due to age and material degradation.
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HVAC Blower Motor:
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Blower motor resistor failure can lead to the fan only working on the highest setting or not at all.
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Timing Chain Tensioners:
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Early 3.0L V6 engines (specifically pre-2005 B6) had issues with timing chain tensioners and guides, leading to rattling noises and potential catastrophic failure. The B7 and later 3.0 V6 revised this.
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Oil Consumption Tfsi:
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The early 2.0 TFSI (2.0T) engines could exhibit higher than normal oil consumption due to issues with piston rings and valve stem seals. Parts catalog is vital for replacement components.
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