What spark plugs does a Ford Focus use?
The Ford Focus uses different spark plugs depending on the engine and model year; there isn’t a single plug that fits every Focus. In most modern Focus engines, Ford specifies iridium or platinum spark plugs installed at the factory, while older designs may use copper-core plugs. Always verify with the vehicle’s VIN/engine code or by checking Ford’s official parts catalog or a trusted parts retailer for the precise part number and gap specification.
Understanding which plugs your Focus needs requires knowing the exact engine and year, since the part numbers and types vary by specification. The guide below outlines how to determine the correct plugs and what to look for across common Focus engine families.
Identify your engine and model year
To know the right spark plugs, locate the engine code (often printed on the engine or in the vehicle’s records) and confirm the model year and market. Then use the VIN to pull a precise cross-reference from Ford’s official parts catalog or a reputable retailer.
Common engine families and typical plug materials
Focus engines span a few broad families. Modern turbocharged EcoBoost engines commonly use iridium or platinum plugs, while older non-turbo Duratec/GCI engines vary and may use platinum or copper-core plugs. The exact part number, gap, and thread size depend on the engine code, so treat this as a guide and verify with a lookup for your specific vehicle.
- EcoBoost engines (turbocharged): typically iridium or platinum spark plugs installed by the factory.
- Duratec/older non-turbo engines: newer iterations tend toward platinum or iridium; older designs may use copper-core plugs. Verify the exact part for your engine code.
- Regional or Zetec-era engines: plug materials and gaps vary by year and market; confirm per engine code.
Because spark plug type, thread size, reach, and gap vary by engine code and market, always confirm the exact part number for your vehicle before buying or replacing plugs.
How to obtain the exact spark plug part number
Follow these steps to ensure you purchase the correct plugs for your Focus:
- Find your VIN and the engine code; use FordParts, the dealer, or a reputable retailer to cross-reference the exact plug part number.
- Compare OEM vs aftermarket equivalents and ensure the plug’s thread size and reach match your engine (and that the anticipated gap is correct).
- Check the service manual or retailer listing for the recommended torque and installation gap to avoid misfires or damage.
Using the correct OEM specification helps maintain ignition performance, fuel efficiency, and engine longevity.
Practical installation notes
When replacing spark plugs, follow proper torque specs and use anti-seize (where recommended) or apply a small amount of dielectric grease to the boots to prevent corrosion. If you're uncertain about your exact plug type, consult a technician or contact FordParts with your VIN.
Bottom line
There is no universal spark plug for all Ford Focus models. The best practice is to identify your engine code and year, then consult Ford’s official parts catalog or a trusted retailer to obtain the exact plug type, gap, and torque specification. OEM Ford plugs (Motorcraft) are typically a safe choice, with NGK or Bosch equivalents available that match the same specs.
Summary: There is no one-size-fits-all spark plug for all Ford Focus models. Determine the exact engine code and year, verify with VIN, and source the exact OEM-recommended plug (or a trusted equivalent) with the correct gap and torque specifications for reliable ignition performance.
What brand spark plugs does Ford use?
Ford spark plugs are made by Motorcraft, which is Ford's own parts brand. The actual manufacturing is often done by other companies, and the specific manufacturer can vary depending on the engine. For example, Autolite makes the spark plugs for many of Ford's naturally aspirated engines, while NGK produces the spark plugs used in many EcoBoost engines.
- Motorcraft is the brand: Motorcraft is the brand name Ford uses for its OEM (Original Equipment Manufacturer) parts, including spark plugs.
- Specific manufacturer varies: While they are sold under the Motorcraft brand, the actual company that physically manufactures the spark plug can differ. This is a common practice across the auto industry for OEM parts.
- Examples of manufacturers:
- Autolite: Historically and currently makes spark plugs for Ford's naturally aspirated engines.
- NGK: Produces spark plugs for many of Ford's EcoBoost engines.
How do I know which spark plugs to use?
To find the correct spark plugs, first check your vehicle's owner's manual for the specific part number or specifications. If the manual is unavailable, you can also use your car's information (year, make, model, engine size) to look up compatible plugs on an auto parts store's website or consult with a sales associate. Always follow the manufacturer's recommendation to ensure proper engine performance and avoid potential issues.
This video explains different types of spark plugs and how to choose the right one: 53sThe Engineers PostYouTube · Aug 15, 2024
Where to find the right spark plug information
- Owner's manual: This is the most reliable source, as it contains the precise specifications your manufacturer recommends.
- Auto parts store websites: Most stores have a "compatibility checker" tool online where you can enter your vehicle's details (year, make, model, engine size) to find a list of compatible spark plugs.
- In-store associates: If you visit a physical store, an employee can look up the correct spark plugs for you by using your vehicle's information.
- Existing spark plug: You can remove one spark plug and find a part number printed on it. You can then use this number to cross-reference with a compatible replacement.
- Vehicle information tags: Some cars have information tags, often located near the radiator or under the hood, that may contain the necessary details.
Important considerations
- Match the specifications: Always choose plugs that match the type, size, and heat range your engine is designed for.
- Avoid downgrading materials: If your car requires a premium plug (like iridium), do not switch to a cheaper option like platinum or copper, as this could lead to poor performance.
- Gapping: Ensure the spark plug gap is set according to your engine's specifications, which is also typically found in the owner's manual or on a specification sheet.
What kind of spark plugs are in a 2013 Ford Focus?
NGK Iridium IX Iridium Spark Plug 94374.
What type of spark plugs are in a Ford Focus?
Motorcraft – Iridium Spark Plug: Enhanced Ignition & Fuel Efficiency (Part No. SP-492-X)
