Best spark plugs for a 1999 Ford Expedition
Spark plug listings at Advance Auto Parts
Advance Auto Parts
Autolite
Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 103
MPN 103
$4.79
Advance Auto Parts
Autolite
Autolite Copper Resistor Spark Plug: Quick Starts & Reliable Performance, 104
MPN 104
$4.79
Advance Auto Parts
Autolite
Autolite Copper Resistor Spark Plug: Smooth Acceleration & Enhanced Durability, 764
MPN 764
$2.99
Advance Auto Parts
Autolite
Autolite Double Platinum Spark Plug: Enhanced Durability & Performance, APP103
MPN APP103
$7.49
Advance Auto Parts
Autolite
Autolite Double Platinum Spark Plug: Enhanced Durability & Performance, APP104
MPN APP104
$7.49
Advance Auto Parts
Autolite
Autolite Platinum Spark Plug (AP103): Improved Performance & Durability
MPN AP103
$5.49
Advance Auto Parts
Autolite
Autolite Platinum Spark Plug: Enhanced Durability & Fuel Efficiency, AP104
MPN AP104
$5.49
Advance Auto Parts
Autolite Iridium
Autolite Iridium Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP103
MPN XP103
$11.49
Advance Auto Parts
Autolite Iridium
Autolite Iridium Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP104
MPN XP104
$11.49
Advance Auto Parts
Champion
Champion Double Platinum Power Spark Plug RS12PYPB5 - Enhanced Durability & Performance, 7963
MPN 7963
$8.89
Advance Auto Parts
Champion
Champion Platinum Power Spark Plug RS10PYC - Powerful Performance & Longevity, 3408
MPN 3408
$6.49
Advance Auto Parts
Champion
Champion Platinum Power Spark Plug RS10PYC4 - Powerful Performance & Longevity, 3401
MPN 3401
$5.89
Advance Auto Parts
DENSO
DENSO Double Platinum Spark Plug: OE Performance, lasts 60K+ Miles, PT16EPR-L13, 5070
MPN 5070
$12.49
Advance Auto Parts
DENSO
DENSO Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IT20, 5326
MPN 5326
$14.49
Advance Auto Parts
DENSO
DENSO Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, IT20TT, 4714
MPN 4714
$13.49
Advance Auto Parts
E3
E3 DiamondFIRE Automotive Spark Plug: More Power & Fuel Efficiency, E3.53
MPN E3.53
$8.49
Advance Auto Parts
Motorcraft
Motorcraft High-Durability Spark Plug: Reduces Misfires & Fuel Consumption, SP-479-X
MPN SP-479-X
$7.99
Advance Auto Parts
Motorcraft
Motorcraft High-Performance Spark Plug: Enhances Fuel Efficiency & Reliability, SP-413-X
MPN SP-413-X
$5.49
Advance Auto Parts
Motorcraft
Motorcraft Platinum Spark Plug (AGSF22WM): Enhanced Durability & Reliability, SP-479
MPN SP-479
$6.79
Advance Auto Parts
NGK
NGK G-Power Platinum Spark Plug (TR55GP): Enhanced Durability & Efficiency, 3403
MPN 3403
$8.99
Advance Auto Parts
NGK
NGK Iridium IX Spark Plug (TR55IX): Outstanding Acceleration & Durability, 7164
MPN 7164
$14.99
Advance Auto Parts
NGK
NGK Laser Iridium Spark Plug (ITR5H13): Fine Wire Tip for Precision, 97287
MPN 97287
$23.99
Advance Auto Parts
NGK
NGK V-Power Nickel Spark Plug (TR55): Enhanced Ignitability & Performance, 3951
MPN 3951
$7.49Spark plug listings on Amazon
Brand and material notes
Copper plugs are often the least expensive. Platinum and iridium listings usually last longer and cost more. Use the merchant page and your owner’s manual — this site does not assign a heat range or claim a performance gain.
Before you buy
- Confirm the engine code on the vehicle or build sticker.
- Match the OE spark-plug number when you have it.
- Check plug gap, torque, and how many plugs the engine uses.
- Treat Advance and Amazon cards as separate offers, not the same SKU.
Other eligible years
This site contains affiliate links. We may earn a commission if you buy through Advance Auto Parts or Amazon. Listings come from merchant catalogs for the selected year, make, and model. They are not OEM confirmation of engine, plug gap, torque, heat range, or quantity.