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2003 Audi A4/Avant

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 A4/Avant.

Body PASSENGER CAR

The 2003 Audi A4 and Avant arrive as passenger-car variants that specify a 4.2-quart oil capacity filled with 5W-30 or 5W-40 API grades, a detail that underscores the precision of their powertrain maintenance. Owner-reported data tallies 215 complaints, with the fuel system emerging as the leading concern, while four recalls mark the official safety record. Together these figures place the model year in a reliability context where gasoline delivery components warrant particular attention from technicians and buyers alike.

Model year2003 2002

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.2 qtOEM · verified

Engine oil type5W-30 / 5W-40 APIOEM · verified

Lug nut torque89 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 94R · 640 CCA battery, OE oil filter 068115561B. Note the factory serpentine belt is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 94R · 640 CCAOEM · verified

Tail / brake / turnRUNOEM · verified

Tire size205-60HR15 OR 215-55HR16OEM · verified

Wheel / rim7-J, OPTIONAL: 7.5-J inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	068115561B alt 078115561J
Engine air filter	06C133843
Fuel filter	8E0201511L alt 1J0201511A
Spark plug	101905611 alt 101000063AA
Battery	000915105AG
Front wiper blades	8E0955425A alt 8H1955426C
Serpentine belt	06B903137D discontinued · alt 078903137BJ
Thermostat	06B121119C alt 06B121111K
Cabin air filter	8E0819439 alt 4B0819439C

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.2 qt of 5W-30 / 5W-40 API engine oil, SYNTHETIC · 75W-90 · GL-4 in the differential, DOT 4 brake fluid. Torque lug nuts to 89 ft-lbs, the oil drain plug to 22.0 ft-lbs. The firing order is 1-4-3-6-2-5. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Brake Fluid	DOT 4
Differential Gear Oil	SYNTHETIC · 75W-90 · GL-4 · GL-5
Differential Gear Oil Capacity	3.2 Pints
Differential Gear Oil	SYNTHETIC · 75W-90 · GL-4 · GL-5
Differential Gear Oil Capacity	3.2 Pints
Differential Gear Oil	SYNTHETIC · 75W-90 · GL-4
Differential Gear Oil Capacity	1.7 Pints
Engine Oil	5W-30 · 5W-40 · API

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs	7 ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs	18 ft-lbs
Intake Manifold to Engine Bolts	7 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	18 ft-lbs
Intake Manifold to Engine Bolts	7 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	18 ft-lbs
Engine Oil Pan Drain Plug	22.0 ft-lbs
Engine Oil Pan Drain Plug	22.0 ft-lbs

Chassis torques

Lug Nuts	89 ft-lbs
Transfer Case Fill Plug	30.0 ft-lbs
Transfer Case Drain Plug	30.0 ft-lbs
Rear Wheel Hub	85 ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-4-3-6-2-5
Curb Idle Speed (No Load)	AWD: 860, FWD: 800 rpm
Curb Idle Speed Variance (No Load)	60 rpm
Curb Idle Speed (No Load)	750 rpm
Curb Idle Speed Variance (No Load)	50 rpm
Ignition Coil Primary Resistance	0.4-0.6 ohms
Ignition Coil Secondary Resistance	9000-14,000 ohms

Battery & A/C

Refrigerant	R134a
Standard BCI Group Number	94R
Standard BCI Cranking Performance	640 cca
Optional BCI Group Number	49
Optional BCI Cranking Performance	760 cca
Standard BCI Group Number	94R
Standard BCI Cranking Performance	640 cca
Optional BCI Group Number	49

Service checks

Pressure Test	14.5 psi
Radiator Cap Pressure Relief	20-23 psi
Thermostat Opening Temperature	188 °F
Pressure Test	14.5 psi
Radiator Cap Pressure Relief	20-23 psi
Thermostat Opening Temperature	188 °F
Regulated Fuel System Pressure (Without Vacuum)	58.0 psi
Regulated Fuel System Pressure (With Vacuum)	50.0 psi

Brakes

Torque Caliper to Bracket	26 ft-lbs / 22 ft-lbs / 140 ft-lbs
Torque to Knuckle	55 ft-lbs / 140 ft-lbs / 147 ft-lbs
Minimum Pad Thickness	Front: 0.394; Rear: 0.276 front
Rotor Nominal Thickness From	0.394 in
Rotor Nominal Thickness To	0.394 in
Rotor Discard at or Under	0.315 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

22 ft. lbs., Step 2: 90

22 ft. lbs

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

22 ft. lbs., Step 2: 90

22 ft. lbs

Cylinder Head — tightening sequence 2 stages

1	29.5 ft. lbs.	29.5 ft. lbs
2	180 degrees	180 degrees

Cylinder Head — tightening sequence 2 stages

1	29.5 ft. lbs.	29.5 ft. lbs
2	180 degrees	180 degrees

Flex or Driveplate Bolts — tightening sequence 1 stages

44 ft. lbs., Step 2: 90

44 ft. lbs

Engine Flywheel Bolts — tightening sequence 1 stages

44 ft. lbs., Step 2: 180

44 ft. lbs

Main Bearings — tightening sequence 1 stages

48 ft. lbs., Step 2: 90

48 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 40,000 mi.

Every 10,000 mi	Battery (inspect electrolyte level) · Brake Shift Interlock Solenoid (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Door Stop (lubricate) · Engine Coolant System (inspect fluid level)
Every 20,000 mi	Cabin Air Filter (replace) · Engine Assembly (leak inspection) · Headlamp (inspect alignment) · Sunroof Assembly (lubricate) · Suspension Ball Joint (inspect) · Transmission Assembly (leak inspection)
Every 40,000 mi	Air Conditioning Evaporator Case Drain (inspect) · Final Drive (leak inspection) · Power Steering System (inspect fluid level) · Spark Plugs (replace)
Every 60,000 mi	Engine Air Filter Element (replace)
Every 80,000 mi	Drive Belt (replace)
At 105,000 mi	Accessory Drive Belt (inspect) · Timing Belt (replace)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2003 Audi A4/Avant top in one area — the fuel system, gasoline, 32 of 215 reports (15%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 10 of the reports describe a crash and 6 a fire — a small share of the total, but worth weighing against the fuel system, gasoline pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

Open recalls

NHTSA campaigns

165

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

215

Owner complaints

10 involved a crash · 6 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 215 complaints on record, top 8 components.

Fuel System, Gasoline32

Power Train29

Exterior Lighting18

Vehicle Speed Control18

Electrical System14

Visibility10

Engine & Engine Cooling9

Air Bags9

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 165 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
A0023742052680_4	2023-10-04	Equipment	This bulletin provides information on the additional reporting requirements for safety…
SM 48-2022	2022-06-15	Equipment	This special notice is to inform dealers to return the parts listed if it meets the…
A0021482021205_6	2021-06-25	Structure	This informational bulletin explains how to order replacement VIN plates, Safety…
A0020362002047_1	2020-04-16	Equipment	This information bulletin contains instructions for technicans on how to ensure their TAC…
A0019252011732_1	2019-09-17	Electrical System	00 Software Version Management (SVM), operating instructions

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific A4/Avant. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 94R battery Vehicles taking 4.2 qt Engine oil filter 068115561B Engine air filter 06C133843 Fuel filter 8E0201511L Spark plug 101905611

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2003 A4/Avant take?

4.2 qt of 5W-30 OR 5W-40 API MEETING VW SPECIFICATION VW50200, per the factory manual.

Does the 2003 A4/Avant have open recalls?

NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.