Complete 100,000-mile maintenance service including oil change, filter replacements, fluid exchanges, spark plug replacement, and comprehensive inspection of critical drivetrain and brake components.

Warnings

Tools required

Parts

• Engine oil filter × 1 — Motorcraft FL-910S or equivalent
• Engine air filter × 1 — Motorcraft FA-1927 or equivalent
• Cabin air filter × 1 — Motorcraft FP-67 or equivalent
• Spark plugs (EcoBoost specific) × 6 — Motorcraft SP-553 (Iridium)
• Oil drain plug crush washer × 1 — Use OEM specification
• Rear differential drain and fill plug gaskets × 2 — Use OEM specification

Fluids

• Motorcraft 0W-20 Full Synthetic — 6 qt
• Motorcraft MERCON LV ATF — 11 qt
• Motorcraft 75W-140 Synthetic Gear Oil — 2 qt
• Motorcraft DOT 4 LV Brake Fluid — 1 qt
• Motorcraft Orange Coolant — 1 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely (minimum 2 hours)
3. Gather all fluids, filters, and parts before starting
4. Lift front of vehicle and support on jack stands at frame rails
5. Remove front wheels for brake inspection access
6. Install oil drain pan under engine oil pan

Procedure

1. 1

   Perform engine oil and filter change
   Remove oil fill cap. Locate oil drain plug on bottom of oil pan. Remove drain plug and allow oil to drain completely (approximately 10 minutes). Remove oil filter using filter wrench. Clean filter mounting surface. Install new oil filter hand-tight plus 3/4 turn. Install new crush washer on drain plug and torque to specification. Fill engine with 6.0 quarts of 0W-20 synthetic oil. Replace oil fill cap.
2. 2

   Replace engine air filter
   Open hood and locate air filter housing on driver side of engine bay. Release air box clips (typically 4 clips). Lift air box cover and remove old air filter. Clean any debris from air box housing. Install new air filter ensuring proper seating. Replace air box cover and secure all clips to specification.
3. 3

   Replace cabin air filter
   Open passenger door. Locate cabin air filter access panel behind glove box (may require glove box removal on some models). Remove panel cover screws. Slide out old cabin air filter noting airflow direction arrow. Install new cabin air filter with airflow arrow pointing toward rear of vehicle. Reinstall access panel and torque screws to specification.
4. 4

   Replace spark plugs
   Remove engine cover by pulling upward (press-fit clips). Disconnect ignition coil connectors on all six cylinders. Remove coil mounting bolts and carefully extract coils. Use compressed air to clean debris from spark plug wells. Remove spark plugs using spark plug socket. Inspect plug condition and gap new plugs to 0.031-0.035 inches (verify service manual). Install new plugs hand-tight, then torque to 11 lb-ft (15 Nm). Reinstall ignition coils and torque mounting bolts to specification. Reconnect all coil connectors.
   ⚠Do not drop ignition coils or spark plugs. Ceramic insulators are fragile and damage will cause misfires.
5. 5

   Exchange transmission fluid
   Locate transmission fluid pan under vehicle. If equipped with drain plug, drain fluid into appropriate container. For complete exchange, use transmission fluid exchange machine connected to cooler lines, or perform drain-and-fill three times with 10-mile drives between fills. Total system capacity is 11 quarts. Add Motorcraft MERCON LV fluid only. Check fluid level using dipstick (if equipped) or via fill plug with engine at operating temperature in Park.
   ⚠Transmission fluid may be hot. Use caution when draining.
6. 6

   Service rear differential
   Locate rear differential on rear axle assembly. Remove fill plug first to break any vacuum. Position drain pan and remove drain plug, allowing fluid to drain completely. Inspect fluid for metal particles or unusual debris. Install new gasket on drain plug and torque to specification. Fill differential with 2.0 quarts of Motorcraft 75W-140 synthetic gear oil through fill hole until fluid reaches bottom of fill hole threads. Install new gasket on fill plug and torque to specification.
   ℹ️Excessive metal particles in differential fluid may indicate wear requiring further inspection.
7. 7

   Inspect and flush brake fluid
   Check brake fluid level and condition in master cylinder reservoir. If fluid is dark or contaminated, perform brake fluid flush. Using brake bleeder kit, bleed each wheel starting with passenger rear, driver rear, passenger front, then driver front. Replace with fresh Motorcraft DOT 4 LV brake fluid until clean fluid emerges from each bleeder. Torque bleeder screws to specification. Top off master cylinder to MAX line.
8. 8

   Inspect cooling system and top off coolant
   With engine cold, remove coolant reservoir cap. Check coolant level and condition. Coolant should be bright orange. If discolored or low, top off with Motorcraft Orange coolant (pre-mixed 50/50). Inspect all hoses for cracks, bulges, or leaks. Check radiator and intercooler for damage. Reinstall cap. Note: Full coolant exchange not typically required at 100K unless contaminated.
   ⚠️Never open cooling system when hot. System is pressurized and can cause severe burns.
9. 9

   Inspect brake pads and rotors
   With wheels removed, inspect brake pads through caliper window. Minimum pad thickness is 3mm. Inspect rotors for scoring, cracks, or excessive wear. Measure rotor thickness if wear is visible (minimum specification: front 28mm, rear 18mm). Check caliper slide pins for proper lubrication and movement. Inspect brake lines and hoses for damage or leaking.
   ℹ️Replace brake pads if thickness is below 4mm to avoid need for service before next interval.
10. 10

    Inspect suspension and steering components
    Inspect ball joints for excessive play or torn boots. Check tie rod ends for looseness or damaged boots. Examine control arm bushings for cracking or separation. Inspect CV axles and boots (if AWD) for tears or grease leaks. Check shock absorbers for fluid leaks. Inspect sway bar links and bushings for wear. Look for any loose or missing fasteners on suspension components.
11. 11

    Inspect belts, hoses, and pulleys
    Visually inspect serpentine belt for cracks, glazing, fraying, or missing ribs. Check belt tension (should have approximately 1/2 inch deflection). Inspect all coolant hoses for cracks, soft spots, or leaks. Check turbocharger inlet and outlet hoses for tears or loose clamps. Inspect all vacuum lines for cracks or disconnection. Spin accessory pulleys by hand checking for roughness or noise indicating bearing wear.
12. 12

    Inspect exhaust system
    Visually inspect entire exhaust system from manifolds to tailpipe. Look for cracks, holes, or rust damage. Check all hangers for damage or separation. Inspect catalytic converters and turbocharger heat shields for looseness or damage. Check for exhaust leaks at manifold and turbocharger connections (look for black soot trails).
13. 13

    Reinstall wheels and lower vehicle
    Clean wheel mounting surfaces on hubs. Install wheels and hand-tighten lug nuts in star pattern. Lower vehicle until wheels just touch ground. Torque lug nuts to specification in star pattern in three stages: 50%, 75%, then 100% torque. Fully lower vehicle and remove jack stands. Check and adjust tire pressures to door placard specification (typically 35 psi front and rear).

Reassembly

1. Double-check all drain plugs and fill caps are properly installed and torqued
2. Verify all electrical connectors (ignition coils, sensors) are fully seated and locked
3. Confirm engine cover is properly installed and secured
4. Ensure no tools or materials are left in engine bay or under vehicle

Verification

• Start engine and verify no warning lights illuminate on instrument cluster
• Allow engine to reach operating temperature and check for any fluid leaks under vehicle
• Verify smooth engine idle with no misfires or rough running
• Test drive vehicle for 10-15 miles, checking transmission shift quality and engine performance
• Recheck all fluid levels after test drive with engine at operating temperature
• Verify brake pedal feel is firm with no sponginess
• Re-torque wheel lug nuts after 50 miles of driving
• Reset maintenance reminder in vehicle settings if equipped

More procedures for this vehicle