What spark plugs are recommended for 2003 ford ranger V6 4.0 engine?

The recommended spark plugs for a 2003 Ford Ranger 4.0L V6 engine depend slightly on whether your truck had the original equipment (OE) Motorcraft plugs or if they were already replaced with something else. However, Motorcraft AGSF22C or equivalent are generally considered the best replacement.

Always check your owner's manual for the *specific* recommendation from Ford. If you can't find the manual, a reputable parts store (like AutoZone, Advance Auto Parts, or NAPA) can look up the correct plugs using your vehicle's VIN.

While Motorcraft AGSF22C is a good starting point, other brands offer equivalent plugs, but ensure they meet the following specifications:

* Heat Range: Match the heat range of the Motorcraft AGSF22C. Using the wrong heat range can lead to pre-ignition or fouling.

* Thread Size and Reach: These must be exactly the same as the originals to ensure proper fit and sealing.

* Type: Make sure they are platinum or iridium tipped plugs, as these are typically recommended for this engine due to their longer lifespan.

Never hesitate to consult with a knowledgeable parts professional at an auto parts store if you're unsure about which spark plugs to choose. Providing them with your VIN will guarantee you get the correct part.