2021 International MV — Factory Maintenance Schedule

Quick reference

Severe-duty schedule

Operating your 2021 International MV under severe conditions necessitates more frequent maintenance to ensure its reliability and longevity. Severe duty includes tasks such as:

• Towing heavy loads regularly
• Frequent operation in dusty or dirty environments
• Short trips (under 5 miles) or extended idling
• Operation in extremely cold climates

If your truck falls into any of these categories, consider the following adjustments:

• Oil and Filter Change: Every 7,500 miles or 6 months, whichever comes first.
• Engine Air Filter: Inspect and replace more frequently, every 7,500 - 10,000 miles depending on conditions.
• Fuel Filter (Primary & Secondary): Replace every 10,000 – 15,000 miles.
• Transmission Fluid Service: Every 30,000 - 45,000 miles.
• Differential Fluid Service: Every 15,000 - 30,000 miles.
• Coolant Flush: Every 30,000 - 45,000 miles.
• Brake Fluid Flush: Every 15,000 – 20,000 miles.

Always refer to your owner's manual for specific severe-duty recommendations, as these can vary based on your engine and transmission configuration.

Known issues by mileage

While the 2021 International MV is a robust commercial vehicle, certain components may exhibit wear or issues at various mileage intervals. It's important to note that these are general observations and not every vehicle will experience them.

• Under 30,000 miles: Initial reports for this generation have sometimes included minor electrical gremlins (e.g., sensor discrepancies, infotainment glitches) that are usually resolved with software updates. Early wear on brake pads and rotors can occur depending on driving style and load, though this is less common in a newer vehicle.
• 30,000 - 60,000 miles: Suspension components, such as control arm bushings or ball joints, may start to show signs of wear, especially if frequently operating on rough roads or with heavy loads. Exhaust regeneration system components (e.g., DPF, DEF system) may require more frequent attention or cleaning if subjected to excessive idling or short trips.
• 60,000 - 100,000 miles: Beyond typical wear items, watch for potential issues with turbocharger components (e.g., actuators, wastegates) if not properly maintained or if subjected to extreme temperatures. Fuel injector performance might start to degrade, affecting fuel economy and power. Clutch wear in manual transmissions will become more noticeable.
• 100,000 - 150,000 miles: At higher mileages, major components like the transmission or engine may begin to show significant wear if not properly serviced. Expect to replace or rebuild steering components (e.g., tie rods, power steering pump) and thoroughly inspect driveline components like universal joints and wheel bearings.

Estimated cost per service

Maintenance costs for a commercial vehicle like the International MV can vary significantly based on your location, chosen service center, and the specific parts required. The following are general estimates, including parts and labor:

• Oil and Filter Change: $200 - $400
• Tire Rotation: $50 - $100
• Engine Air Filter Replacement: $100 - $200
• Cabin Air Filter Replacement: $80 - $150
• Fuel Filter Replacement (Primary and Secondary): $150 - $300
• Brake Fluid Flush: $150 - $250
• Differential Fluid Service: $200 - $400 per axle
• Transmission Fluid Service: $400 - $800
• Coolant Flush: $200 - $400
• Accessory Drive Belt Replacement (if needed): $200 - $400
• Spark Plugs Replacement (if applicable): $300 - $600
• Timing Belt/Chain Inspection (if replacement needed, costs will be much higher): $150 - $300 (inspection only)

These estimates are for routine services; unaddressed issues or major repairs will incur additional costs.

What you can DIY vs shop

For a commercial vehicle like the International MV, many owners with mechanical aptitude and appropriate tools can perform some basic maintenance tasks. However, due to the complexity and specialized equipment often required, many services are best left to a professional shop.

DIY-friendly tasks:

• Oil and Filter Change: With proper disposal facilities and tools, this is feasible. Be sure to use factory-spec oil and filters.
• Tire Rotation: Requires a heavy-duty jack and jack stands, and a torque wrench for correct lug nut tightening.
• Cabin Air Filter Replacement: Usually a straightforward procedure located behind the glovebox.
• Wiper Blade Replacement: Simple and quick.
• Fluid Level Checks: Regularly checking engine oil, coolant, power steering, and washer fluid levels can prevent issues.

Best left to a professional shop:

• Fuel Filter Replacement: Proper bleeding procedures are crucial for diesel fuel systems.
• Brake Fluid Flush: Requires specialized equipment to ensure all old fluid is replaced and no air enters the system.
• Transmission Fluid Service: Specific fill procedures and fluid types are critical for automatic transmissions.
• Coolant Flush: Proper disposal of old coolant and ensuring no air pockets remain in the system.
• Differential Fluid Service: Correct fluid type, fill level, and sometimes specialized tools for access.
• Spark Plug Replacement: Can be challenging on some engines, requiring specialized tools and knowledge to avoid damage.
• Timing Belt/Chain Inspection/Replacement: This is a complex job that, if done incorrectly, can lead to catastrophic engine damage.
• Any diagnostic work: Modern commercial vehicles rely heavily on computer diagnostics. A professional shop has the necessary scanning tools.

When in doubt, always consult your owner's manual or a certified International service center. Safety should always be your top priority when performing any maintenance.

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