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NGK IRIDIUM IX Spark Plug | LFR6AIX11

BMW, Honda, Lexus, Mercedes, Subaru, Suzuki, Toyota, Volvo
$8.49
Reg
$8.84
List
$11.10
In Stock Status
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Make Sure It Fits

P/N: LFR6AIX11 NGK IRIDIUM IX OEM
Cross References:
  • 0041591303
  • 3588
  • 6619
  • 6919
  • ILFR6A
  • NG6619
  • W01331631747
  • W01331915449

Spark plugs provide the spark needed to ignite the air/fuel mixture in each cylinder for engine combustion. High voltage from the ignition coil is transferred through the spark plug to an air gap between the spark plug tip and the spark plug ground to the engine. Once the voltage reaches the air gap, the voltage jumps the gap in the form of a spark, igniting a compressed air fuel charge inside the cylinder. The air fuel charge explodes, creating the force needed to push the cylinder down and turning the engine crankshaft to propel the engine. In short, spark plugs serve a vital function in keeping your vehicle running properly.

Components of a Spark Plug
  • A metal terminal that connects to the ignition system
  • A center electrode for current to flow through the spark plug with a tip for the current to jump making the spark
  • A ribbed ceramic insulator to keep current flowing through the spark plug center electrode and not into other parts of the engine
  • A threaded metal case to anchor the spark plug into the cylinder head with a ground electrode for the spark to jump to
  • A seal to seal the spark plug case to the cylinder head to prevent cylinder compression from escaping
Types of Spark Plugs

The biggest differences in spark plug construction are the materials used for the electrodes, their conductivity, and their wearability.

  • Copper is the base material for the center electrode on most spark plugs as it provides superb conductivity. These tend to wear quickly from the electrical transfer created by the spark and fully copper spark plugs need to be replaced every 15,000 miles.
  • Copper core spark plugs with yttrium or nickel tipped electrodes and grounds take longer to wear and can last up to 30,000 miles.
  • Platinum tipped copper core electrodes wear even less, provide superior conductivity, and can last up to 60,000 miles.
  • Iridium tipped copper core spark plugs wear the least and can last over 100,000 miles.

When a spark plug fails prematurely it will provide a weak spark or no spark at all. Causes of premature spark plug failure can include oil leaking from the valve cover into the spark plug chamber, your engine running too lean and overheating the spark plug, and your engine running too rich and fuel fouling the plug.

Most engines are designed to run on only one type of spark plug based on its use. Be sure to check your owner’s manual for the right type of spark plug needed for your vehicle.

View more NGK Spark Plugs.

Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

Frequently Viewed Together

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What This NGK IRIDIUM IX Spark Plug Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

BMW
10-10 - 528i
Iridium Resistor
10-10 - 528i xDrive
Iridium Resistor
Honda
10-11 - Civic Hybrid
Hybrid Resistor Iridium
Lexus
07-11 - ES350
Iridium Resistor
10-11 - GX460 Base, Premium
Iridium Resistor
08-11 - LX570
Iridium Resistor
07-11 - RX350 AWD
Iridium Resistor
07-11 - RX350 FWD
Iridium Resistor
10-11 - RX450h AWD
Iridium Resistor
10-11 - RX450h FWD
Iridium Resistor
Mercedes
03-05 - C230 Kompressor
4 per car.
03-06 - CL55 AMG
16 per car.
06-06 - CLS55 AMG
16 per car.
04-06 - E55 AMG
16 per car.
03-03 - E55 AMG
Iridium Resistor
03-11 - G55 AMG
16 per car.
03-06 - S55 AMG Base, Kompressor
16 per car.
03-08 - SL55 AMG Base, Kompressor
16 per car.
07-07 - SLR MCLAREN
16 per car.
05-09 - SLR McLaren
16 per car.
Subaru
04-06 - Baja Turbo
Iridium Resistor Turbo
07-10 - Forester Sports 2.5 XT, XT, XT Limited, XT Premium
Iridium Turbo Resistor
05-05 - Forester XT, XT Premium
Resistor Iridium Turbo; Cylinder Head Type: DOHC
04-11 - Impreza 2.5 GT, WRX, WRX Limited, WRX Premium, WRX STI & more
Iridium Turbo Resistor
05-08 - Legacy GT, GT Limited, GT spec.B
Iridium Turbo Resistor
03-11 - Outback 3.0 R Limited, 3.6R, 3.6R Limited, 3.6R Premium, H6 & more
Iridium Resistor
09-09 - Outback XT Limited
Iridium Resistor Turbo; Cylinder Head Type: DOHC
05-08 - Outback XT, XT Limited
Iridium Turbo Resistor
08-11 - Tribeca Base, Limited, Premium, Touring
Iridium Resistor
Suzuki
09-12 - Grand Vitara
Iridium L4 Resistor
09-12 - Grand Vitara 4WD Limited, Luxury, Premium, XSport
Iridium L4 Resistor
10-12 - Grand Vitara AWD Premium, Ultimate Adventure Edition
Iridium L4 Resistor
09-12 - Grand Vitara RWD Limited, Luxury, Premium, Ultimate Adventure Edition, XSport
Iridium L4 Resistor
10-12 - Kizashi AWD GTS, S, SE, SLS, Sport GTS & more
Iridium Resistor
10-12 - Kizashi FWD GTS, S, SE, SLS, Sport GTS & more
Iridium Resistor
10-12 - SX4 Base, Crossover, LE, LE Anniversary Edition, Sport GTS & more
Iridium Resistor
Toyota
10-11 - 4Runner Trail
Iridium Resistor
10-10 - 4Runner 4WD SR5
Iridium L4 Resistor
03-11 - 4Runner 4WD Limited, Sport, SR5
Iridium Resistor
10-10 - 4Runner RWD SR5
Iridium L4 Resistor
03-11 - 4Runner RWD Limited, Sport, SR5
Iridium Resistor
06-12 - Avalon Base, Limited, Touring, XL, XLS
Iridium Resistor
07-08 - FJ Cruiser Trail Teams Special Edition, TRD Special Edition
Iridium Resistor
07-11 - FJ Cruiser 4WD
Iridium Resistor
07-11 - FJ Cruiser RWD
Iridium Resistor
11-11 - Highlander Hybrid, Hybrid Limited
Iridium Resistor
11-11 - Highlander AWD Base, Limited, SE
Iridium Resistor
08-10 - Highlander AWD Base, Limited, Sport
Resistor Iridium; Fuel Type: GAS
11-11 - Highlander FWD Base, Limited, SE
Iridium Resistor
08-10 - Highlander FWD Base, Limited, Sport
Resistor Iridium; Fuel Type: GAS
10-11 - Land Cruiser
Iridium Resistor
09-11 - Sequoia 4WD Limited, Platinum, SR5
Iridium Resistor
09-11 - Sequoia RWD Limited, Platinum, SR5
Iridium Resistor
09-11 - Tacoma Pre Runner
Iridium L4 Resistor
06-11 - Tacoma Pre Runner, X-Runner
Iridium Resistor
Volvo
10-10 - C30 T5, T5 R-Design
Iridium Resistor
10-10 - C70 T5
Iridium Resistor
10-10 - S40 AWD T5 R-Design
Iridium Resistor
10-10 - S40 FWD T5 R-Design
Iridium Resistor
10-10 - S80 3.2, T6
Iridium Resistor
10-10 - V50 T5 R-Design
Iridium Resistor
10-10 - V70 3.2
Iridium Resistor
10-10 - XC60 T6, T6 R-Design
Iridium Resistor
10-10 - XC60 AWD 3.2
Iridium Resistor
10-10 - XC60 FWD 3.2
Iridium Resistor
10-10 - XC70 3.2, T6
Iridium Resistor
10-10 - XC90 AWD 3.2
Iridium Resistor
10-10 - XC90 FWD 3.2
Iridium Resistor