Ford Focus ST Mk4 Maintenance Guide

Maintenance Guide for the Ford Focus ST Mk4 (2019+)

The Ford Focus ST Mk4, with its punchy 2.3L EcoBoost engine, needs regular care to stay in top form. This guide covers essential maintenance, based on Ford's service schedule, to help keep your ST performing at its best.

If you're seeking the best parts to keep your pride and joy in tip-top condition, check out our dedicated Mk4 ST service parts and packages page here

Ford Service Schedule Basics:

Ford recommends servicing the Focus ST Mk4 every 12 months or 10,000 miles (16,000 km), whichever comes first. This is a minimum. If you drive hard, do a lot of city driving, or track your car, more frequent servicing is a good idea.

Key Maintenance Items and Intervals:

• Engine Oil and Filter: The most vital job. Change the oil and filter every 12 months or 10,000 miles (16,000 km). Use the correct Ford-approved oil for the EcoBoost. Regular oil changes are crucial for engine health.
• Tyre Condition and Pressure: Check your tyres at least monthly for wear, damage, and correct pressures. Uneven wear points to alignment problems. UK roads can be tough on tyres, so regular checks are essential.
• Brake System: Inspect brake pads and discs at each service. Brake fluid needs changing every two years, regardless of mileage. UK weather can be harsh on brake components. Check out our amazing range of brake parts for your ST Mk4 here
• Coolant: Check the coolant level regularly and top up as needed. A coolant change is due according to Ford's schedule.
• Air Filter: Replace the air filter at the specified intervals, usually every 2 years or 20,000 miles (32,000 km), or more often if you drive in dusty areas.
• Spark Plugs: Spark plugs have a lifespan and should be replaced per the manufacturer's guidelines.
• Transmission Fluid: Check and change the transmission fluid according to Ford's schedule. This is especially important for the automatic gearbox.

Common Issues and Things to Watch Out For:

• Battery Issues: Some owners have reported problems with the original battery. You might see warning messages on the dash, intermittent electrical faults, or features like auto start/stop or the infotainment system going offline due to low voltage. If this happens, a better quality replacement battery is a good investment. A healthy battery is vital for the car's electronics, especially in colder UK weather.
• Engine Management System: While generally sound, some owners have mentioned occasional engine management system hiccups. Keep an eye out for any unusual warning lights or performance issues.
• Clutch Wear (Manual Transmission): Clutches wear out. Be aware of any slipping or difficulty changing gear, which are signs of wear.
• Suspension Components: Listen for knocks or clunks from the suspension, suggesting worn bushes, ball joints, or dampers. Potholes on UK roads can take their toll.
• Tyre Wear: The ST's performance tyres can wear relatively quickly, especially with spirited driving. Keep a close eye on tread depth.

Buying a Used Focus ST Mk4?

• Service History: A full service history is essential, particularly for a performance car. Check that all scheduled maintenance has been done.
• Battery Health: If buying used, ask about the battery's age and condition. If there are any battery-related symptoms, have it checked.
• Pre-Purchase Inspection: A professional inspection is always recommended. It can uncover potential issues before you buy.

Regular Maintenance is Key:

Following the service schedule and dealing with any problems quickly will keep your Focus ST Mk4 running smoothly and reliably. Regular maintenance is an investment in the car's long-term health and performance.