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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Ford Focus car and truck
repair procedures including Ford engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your 2003 Ford Focus automobile. Try the Automotix DIY solution today!
We have info for following modifications of 2003 Ford Focus
- 2003 Ford Focus SE 2.0 L4 GAS, CC:1989, CID:121, Fuel Injection, Aspiration:121, Engine VIN:, Desg:3
- 2003 Ford Focus SE 2.0 L4 GAS, CC:1989, CID:122, Fuel Injection, Aspiration:122, Engine VIN:, Desg:P
- 2003 Ford Focus SE 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:Z
- 2003 Ford Focus ZTS 2.0 L4 GAS, CC:1989, CID:121, Fuel Injection, Aspiration:121, Engine VIN:, Desg:3
- 2003 Ford Focus ZTS 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:Z
- 2003 Ford Focus ZX3 2.0 L4 GAS, CC:1989, CID:121, Fuel Injection, Aspiration:121, Engine VIN:, Desg:3
- 2003 Ford Focus ZX3 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:Z
- 2003 Ford Focus LX 2.0 L4 GAS, CC:1989, CID:122, Fuel Injection, Aspiration:122, Engine VIN:, Desg:P
- 2003 Ford Focus LX 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:Z
- 2003 Ford Focus SVT 2.0 L4 GAS, CC:1989, CID:122, Fuel Injection, Aspiration:122, Engine VIN:, Desg:5
- 2003 Ford Focus ZTW 2.0 L4 GAS, CC:1989, CID:121, Fuel Injection, Aspiration:121, Engine VIN:, Desg:3
- 2003 Ford Focus ZTW 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:Z
- 2003 Ford Focus ZX5 2.0 L4 GAS, CC:1989, CID:121, Fuel Injection, Aspiration:121, Engine VIN:, Desg:3
- 2003 Ford Focus ZX5 2.3 L4 GAS, CID:140, Fuel Injection, Aspiration:140, Engine VIN:, Desg:Z
BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 Ford Focus cars and light trucks from 1990+.
Disc Brakes -> Rear Disc & Parking Brakes -> Inspection
Vehicle: 2003 Ford Focus ZTS 2.3 L4 GAS
Remove wheels and inspect brake disc, calipers and linings. Inspect and repack wheel bearings if required.
If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.
If caliper was removed when installing new components, clean all components in alcohol, then wipe dry using lint-free cloths. Using an air hose, blow out drilled passages and bores. Inspect dust boots for punctures or tears. If punctures or tears are evident, install new boots during assembly.
Inspect piston bores in both housings for scoring or pitting. Bores showing light scr...
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BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 Ford Focus cars and light trucks from 1990+.
Disc Brakes -> Front Disc Brakes -> Troubleshooting -> Abnormal Conditions -> Brake Booster Operation Test -> Brake Master Cylinder -> Brake Roughness -> Bypass Condition Inspection -> Lateral Runout -> Non-Pressure Leaks -> Normal Conditions -> Thickness Variation -> Wheel Bearing Looseness
Vehicle: 2003 Ford Focus ZX3 2.3 L4 GAS
Brake Roughness
Thickness Variation
If roughness or vibration is encountered during highway operation or if pedal pumping is experienced at low speeds, the disc may have excessive thickness variation. Measure the disc at 12 points with a micrometer at a radius approximately one inch from edge of disc. If thickness measurements vary by more than .0005 inch, replace the disc.
Lateral Runout
Excessive lateral runout of braking disc may cause a "knocking back" of the pistons, possibly creating increased pedal travel and vibration when brakes are applied.
Wheel Bearing Looseness
Adjust the w...
CLICK HERE TO GET FULL ACCESS TO 2003 Ford Focus BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 Ford Focus cars and light trucks from 1990+.
Disc Brakes -> Rear Disc & Parking Brakes -> Inspection
Vehicle: 2003 Ford Focus ZX3 2.0 L4 GAS
Remove wheels and inspect brake disc, calipers and linings. Inspect and repack wheel bearings if required.
If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.
If caliper was removed when installing new components, clean all components in alcohol, then wipe dry using lint-free cloths. Using an air hose, blow out drilled passages and bores. Inspect dust boots for punctures or tears. If punctures or tears are evident, install new boots during assembly.
Inspect piston bores in both housings for scoring or pitting. Bores showing light scr...
CLICK HERE TO GET FULL ACCESS TO 2003 Ford Focus BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 Ford Focus cars and light trucks from 1990+.
Drum Brakes -> Focus -> Tightening Specifications
Vehicle: 2003 Ford Focus SE 2.0 L4 GAS
CLICK HERE TO GET FULL ACCESS TO 2003 Ford Focus BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 Ford Focus cars and light trucks from 1990+.
Drum Brakes -> Focus -> Inspection
Vehicle: 2003 Ford Focus ZTW 2.0 L4 GAS
- Inspect components for damage and unusual wear. Replace as required.
- Inspect wheel cylinders. Boots which are torn, cut, or heat damaged indicate need for wheel cylinder replacement. Fluid spilling from boot center hole or wetness around wheel cylinder ends indicates cup leakage and need for wheel cylinder replacement. A small amount of fluid is always present and is considered normal, acting as lubricant for cylinder pistons.
- Inspect backing p...
CLICK HERE TO GET FULL ACCESS TO 2003 Ford Focus BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 Ford Focus cars and light trucks from 1990+.
Anti-lock Brakes -> Focus -> System Service -> Accelerometer Sensor -> Brake System Bleed -> Component Replacement -> Hydraulic Control Unit -> Installation -> Module Configuration -> Removal -> Steering Wheel Rotation Sensor -> Wheel Speed Sensor -> Yaw Rate Sensor
Vehicle: 2003 Ford Focus ZX5 2.3 L4 GAS
Brake System Bleed
Refer to "Hydraulic Brake Systems" for bleed procedure.
Component Replacement
Hydraulic Control Unit
- Remove reservoir cap from master cylinder.
- Raise and support vehicle, then remove front wheels.
- Drain fluid from brake system as follows:
- Loosen caliper bleeder screw.
- Connect a suitable hose and container to bleeder screw.
- Open bleeder screw, then depress brake pedal.
- Tighten bleeder screw, then release brake pedal.
- Repeat procedure for opposite caliper.
- Lower vehicle, then remove air cleaner assembly.
- Disconnect electrical connector as shown in Fig. .
- Remove underhood fuse pa...
CLICK HERE TO GET FULL ACCESS TO 2003 Ford Focus BRAKE SERVICE PROCEDURES
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