Ford's emissions warranty is separate from your basic car warranty and covers parts that control pollution from your engine

When you buy a Ford, you actually get two warranties that work independently. Your basic warranty covers most mechanical parts for a set time or mileage. Your emissions warranty covers only the parts that reduce pollution — things like the catalytic converter, oxygen sensors, and the emissions control system — and it lasts longer than your basic coverage.

The emissions warranty exists because the federal government requires it. Ford must may provide that these pollution-control parts will work correctly for a minimum period. If one of these parts fails during that time, Ford will repair or replace it at no cost to you, even if your basic warranty has expired.

The length and coverage of your emissions warranty depends on which Ford model you own and what year it was made. Newer Fords generally have longer emissions coverage than older ones. You do not need to do anything special to set up this warranty — it comes with your vehicle automatically.

Key Takeaways

  • Ford's emissions warranty covers pollution-control parts like catalytic converters and oxygen sensors separately from your basic warranty.
  • Federal law requires Ford to cover emissions parts for at least five years or 50,000 miles, whichever comes first, and some components are covered for eight years or 80,000 miles.
  • Your emissions warranty is automatic and requires no registration or special action on your part.
  • If an emissions part fails, you can take your Ford to any Ford dealership and the repair is covered at no cost during the warranty period.
  • Your owner's manual or Ford's website lists exactly which parts are covered and for how long based on your specific model year.

How long emissions coverage lasts on your Ford

Ford's emissions warranty has two tiers. The first tier covers most emissions parts for five years or 50,000 miles, whichever comes first. This includes items like oxygen sensors, fuel injectors, and the emissions control module.

The second tier covers major emissions components for eight years or 80,000 miles, whichever comes first. This longer coverage applies to parts that are central to the emissions system, such as the catalytic converter and the engine control computer. These are the expensive parts, so the longer coverage protects you if they fail after your basic warranty ends.

The exact parts and their coverage periods vary slightly by model year and engine type. Your Ford owner's manual lists the specific emissions parts covered and which tier each one falls into. You can also find this information on Ford's website by entering your vehicle identification number (VIN).

Which parts are covered under emissions warranty

The emissions warranty covers parts that are part of your vehicle's system for reducing tailpipe pollution. These include the catalytic converter, which converts harmful gases into less harmful ones; oxygen sensors, which measure how much oxygen is in the exhaust; and the engine control computer, which manages the fuel and air mixture to reduce emissions.

Also covered are fuel injectors, the evaporative emissions canister (which captures fuel vapors), the exhaust gas recirculation valve, and various hoses and seals that are part of the emissions system. The warranty also covers the onboard diagnostic system that monitors whether these parts are working correctly.

Parts that are not covered include routine maintenance items like spark plugs, air filters, and oil, even though these affect emissions. Damage caused by accidents, neglect, or using the wrong fuel type is also not covered. If you modify your vehicle or remove emissions equipment, Ford can deny the warranty claim.

What to do if an emissions part fails during the warranty period

If you notice a check engine light, rough idling, poor fuel economy, or other signs that an emissions part might be failing, take your Ford to a Ford dealership. The dealership will run a diagnostic test to identify which part is causing the problem.

Bring your owner's manual or have the dealership look up your vehicle's warranty coverage using your VIN. If the failed part is covered under the emissions warranty and you are still within the time or mileage limit, the dealership will repair or replace it at no cost to you. You will not pay for parts or labor.

If you are outside the emissions warranty period, the dealership will give you a repair estimate. At that point, you can choose to pay for the repair yourself, seek a second opinion at an independent mechanic, or explore whether any extended warranty or service plan you purchased covers the part.

How emissions warranty differs from your basic warranty

Your basic Ford warranty typically covers most mechanical and electrical parts for three years or 36,000 miles. After that period ends, you are responsible for repairs. The emissions warranty runs on a separate clock and lasts longer specifically because federal law requires it.

This means you could have a situation where your basic warranty has expired but your emissions warranty is still active. For example, if your oxygen sensor fails at four years and 55,000 miles, your basic warranty would not cover it, but your emissions warranty would because the five-year, 50,000-mile tier has not expired yet.

The emissions warranty also covers only emissions-related parts, while your basic warranty covers the entire vehicle. If a part serves multiple functions — for instance, a computer that controls both emissions and transmission — only the emissions-related portion of the repair would be covered under the emissions warranty.

Transferring your emissions warranty if you sell your Ford

If you sell your Ford to another person, the emissions warranty transfers to the new owner. However, the coverage period is based on the original purchase date, not the date of the sale. So if you sell your Ford at three years and 40,000 miles, the new owner has only two years or 10,000 miles remaining on the five-year, 50,000-mile tier.

The new owner should keep the original purchase documentation and the owner's manual to prove when the vehicle was first purchased. When they take the vehicle to a Ford dealership for an emissions repair, they will need to provide this information so the dealership can verify the warranty is still active.

If you sell your Ford privately, make sure to inform the buyer about the remaining emissions warranty coverage. This can be a selling point, as it means the buyer has some protection against expensive emissions repairs.

What voids your emissions warranty

Your emissions warranty can be denied if you fail to maintain your vehicle according to Ford's maintenance schedule. This means regular oil changes, filter replacements, and other routine service as outlined in your owner's manual. If you skip scheduled maintenance and an emissions part fails as a result, Ford may refuse to cover the repair.

Modifications to your vehicle can also void the warranty. If you install aftermarket parts, remove emissions equipment, or modify the engine in ways that affect the emissions system, Ford can deny coverage. This includes tuning chips, exhaust modifications, or changes to the fuel system.

Using the wrong fuel type — for example, diesel in a gasoline engine — can damage emissions components and void the warranty for those parts. Accidents and physical damage are also not covered. If you have questions about whether a modification or repair you are considering might affect your warranty, ask a Ford dealership before proceeding.

Frequently Asked Questions

Can I take my Ford to an independent mechanic and still use the emissions warranty?

No. The emissions warranty is only valid at Ford dealerships. If an independent mechanic repairs an emissions part, Ford will not reimburse you or cover future failures of that part. Always use a Ford dealership for emissions repairs during the warranty period to keep your coverage intact.

Does the emissions warranty cover the check engine light?

The check engine light itself is not a part, so it is not covered. However, the light comes on when an emissions-related part fails or malfunctions. If the underlying part is covered under your emissions warranty, the repair is covered. The dealership will diagnose what caused the light to come on.

What happens if I exceed the mileage limit but am still within the time limit?

The warranty ends when you reach either the time limit or the mileage limit, whichever comes first. If you hit 50,000 miles before five years have passed, your five-year, 50,000-mile emissions coverage ends at 50,000 miles, even though you have time remaining. The same applies in reverse — if five years pass before you reach 50,000 miles, coverage ends at five years.

Does the emissions warranty cover damage from road salt or rust?

No. Rust and corrosion from road salt are considered normal wear and tear, not manufacturing defects. If a catalytic converter or other emissions part rusts through, it is not covered under the emissions warranty. This is one reason why regular undercarriage washing in winter climates can help protect your vehicle.

Can I purchase an extended emissions warranty?

Ford offers extended service plans that can cover emissions parts beyond the standard warranty period. These are separate purchases and have their own terms and costs. Ask your Ford dealership about extended coverage options when you buy your vehicle or during your first service visit.