4449 Bosch Platinum Spark Plug; Platinum+4; 4 Electrode
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Bosch Platinum Spark Plug; Platinum+4; 4 Electrode | 4449

Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Jeep, Lincoln, Mercury & more
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P/N: 4449 Bosch Platinum
Description:
Platinum+4; 4 Electrode
Pregapped for normal usage. Not recommended for supercharged or turbo models. PERMANENT NLA
Cross References:
  • W01331633676
  • W01331636489
  • W01331850831
  • W01331851201
  • W01331851382
  • W01331851383
  • W01331852004

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 Bosch Spark Plugs.

Bosch is the world's largest supplier of components to the automotive industry. The Bosch product line includes alternators & starters, brakes, electronic controls and sensors, fuel system parts and management, ignition system components, and steering system components. All Bosch automotive parts are either OEM (Original Equipment Manufacturer) or made to their specs as a replacement part for the OEM unit.
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.

Why Buy OEM & Genuine Replacement Auto Parts from AutohausAZ?

Auto parts at wholesale prices is what you will find at AutohausAZ. Have you been searching the web for auto parts for your vehicle? You have come to the right place! Here at Autohaus, we strive to offer low prices on quality replacement parts and providing first rate customer service.

What This Bosch Platinum 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.

Buick
83-92 - Century Custom, Estate, Estate Wagon, Limited, Olympia Limited & more
Do Not Gap, Gap is Preset
84-85 - Electra Limited, Park Avenue
Do Not Gap, Gap is Preset
84-85 - LeSabre Collector's Edition, Custom, Limited
Do Not Gap, Gap is Preset
84-84 - Regal Base, Limited
Do Not Gap, Gap is Preset
84-87 - Regal Base, GNX, Grand National, Limited, Limited RWD & more
Do Not Gap, Gap is Preset; Engine VIN: A
84-84 - Riviera Base, Luxury
Do Not Gap, Gap is Preset
91-93 - Roadmaster Base, Estate Wagon, Limited
Do Not Gap, Gap is Preset
83-91 - Skylark Base, Custom, Gran Sport, Limited, Luxury Edition
Do Not Gap, Gap is Preset
83-85 - Skylark Custom, Limited, Sport, T-Type
Do Not Gap, Gap is Preset; Engine VIN: X
86-87 - Somerset Custom, Limited, T-Type
Do Not Gap, Gap is Preset
85-85 - Somerset Regal Base, Limited
Do Not Gap, Gap is Preset
Cadillac
91-92 - Brougham Base, d'Elegance
Do Not Gap, Gap is Preset
92-93 - Commercial Chassis Brougham
Do Not Gap, Gap is Preset
93-93 - Fleetwood Base, Brougham
Do Not Gap, Gap is Preset
Chevrolet
85-89 - Astro Base, CL, CS, LT
Do Not Gap, Gap is Preset
90-95 - Astro AWD Base, CL, CS, LT
Do Not Gap, Gap is Preset
90-95 - Astro RWD Base, CL, CS, LT
Do Not Gap, Gap is Preset
87-94 - Blazer Base, Cheyenne, Custom Deluxe, Scottsdale, Silverado & more
Do Not Gap, Gap is Preset
95-95 - Blazer 4WD Base, LT
Do Not Gap, Gap is Preset; Engine VIN: W
95-95 - Blazer AWD LT
Do Not Gap, Gap is Preset; Engine VIN: W
95-95 - Blazer RWD Base, LT
Do Not Gap, Gap is Preset; Engine VIN: W
83-86 - C10 Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset
85-86 - C10 Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C10 Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset; Light Duty
83-86 - C10 Suburban Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset
85-86 - C10 Suburban Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C10 Suburban Custom, Silverado
Do Not Gap, Gap is Preset; Light Duty
88-95 - C1500 Base, 454 SS, Cheyenne, Scottsdale, Silverado & more
Do Not Gap, Gap is Preset
92-93 - C1500 Cheyenne, Scottsdale, Silverado, WT
Do Not Gap, Gap is Preset; Fuel Type: GAS
92-95 - C1500 Suburban Base, LS, LT, Silverado
Do Not Gap, Gap is Preset
83-86 - C20 Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset
84-86 - C20 Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C20 Custom, Scottsdale, Silverado
Do Not Gap, Gap is Preset; Light Duty
Chrysler
83-83 - Cordoba
Do Not Gap, Gap is Preset
83-83 - Fifth Avenue
Do Not Gap, Gap is Preset
Dodge
83-87 - B150
Do Not Gap, Gap is Preset
83-87 - B250
Do Not Gap, Gap is Preset
86-87 - D100 Custom
Do Not Gap, Gap is Preset
84-87 - D150
Do Not Gap, Gap is Preset
83-83 - D150 Base, Miser
Do Not Gap, Gap is Preset; Engine VIN: H
83-87 - D250
Do Not Gap, Gap is Preset
83-83 - Diplomat Medallion, Salon
Do Not Gap, Gap is Preset
83-83 - Mirada Special Coupe
Do Not Gap, Gap is Preset
86-87 - W100 Custom
Do Not Gap, Gap is Preset
83-87 - W150
Do Not Gap, Gap is Preset
Ford
83-96 - Bronco Custom, Eddie Bauer, XL, XLS, XLT & more
Do Not Gap, Gap is Preset
83-83 - E-100 Econoline Custom, XL
Do Not Gap, Gap is Preset
83-83 - E-100 Econoline Club Wagon Custom, XL
Do Not Gap, Gap is Preset
83-96 - E-150 Econoline Base, Custom, XL
Do Not Gap, Gap is Preset
84-84 - E-150 Econoline Base, XL
Do Not Gap, Gap is Preset; Engine VIN: G
83-96 - E-150 Econoline Club Wagon Base, Chateau, Custom, XL, XLT
Do Not Gap, Gap is Preset
84-84 - E-150 Econoline Club Wagon Base, XL, XLT
Do Not Gap, Gap is Preset; Engine VIN: G
83-91 - E-250 Econoline Base, Custom, XL
Do Not Gap, Gap is Preset
83-91 - E-250 Econoline Club Wagon Base, Custom, XL, XLT
Do Not Gap, Gap is Preset
83-96 - E-350 Econoline Base, Custom, XL
Do Not Gap, Gap is Preset
83-96 - E-350 Econoline Club Wagon Base, Chateau, Chateau HD, Custom, Custom HD & more
Do Not Gap, Gap is Preset
83-83 - F-100 Base, XL, XLS, XLT Lariat
Do Not Gap, Gap is Preset
83-96 - F-150 4WD Base, Custom, Eddie Bauer, Special, XL & more
Do Not Gap, Gap is Preset
85-85 - F-150 4WD Base, XL, XLT Lariat
Do Not Gap, Gap is Preset; Engine VIN: N
83-96 - F-150 RWD Base, Custom, Eddie Bauer, Special, XL & more
Do Not Gap, Gap is Preset
85-85 - F-150 RWD Base, XL, XLT Lariat
Do Not Gap, Gap is Preset; Engine VIN: N
83-97 - F-250 4WD Base, Custom, Eddie Bauer, Lariat, Special & more
Do Not Gap, Gap is Preset
85-96 - F-250 4WD Base, Eddie Bauer, Special, XL, XLT & more
Do Not Gap, Gap is Preset; Engine VIN: N
83-97 - F-250 RWD Base, Custom, Eddie Bauer, Lariat, Special & more
Do Not Gap, Gap is Preset
GMC
83-95 - C1500 Base, High Sierra, Sierra, Sierra Classic, Sierra SL & more
Do Not Gap, Gap is Preset
85-86 - C1500 Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C1500 Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Light Duty
83-95 - C1500 Suburban Base, High Sierra, Sierra Classic, SLE, SLT
Do Not Gap, Gap is Preset
85-86 - C1500 Suburban Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Engine VIN: H
85-86 - C1500 Suburban Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C1500 Suburban Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Light Duty
83-95 - C2500 Base, High Sierra, Sierra, Sierra Classic, Sierra SL & more
Do Not Gap, Gap is Preset
84-86 - C2500 Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C2500 Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Light Duty
83-95 - C2500 Suburban Base, High Sierra, Sierra Classic, SLE, SLT
Do Not Gap, Gap is Preset
84-86 - C2500 Suburban Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Engine VIN: L
83-83 - C2500 Suburban Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Light Duty
86-95 - C3500 Base, High Sierra, Sierra, Sierra Classic, Sierra SL & more
Do Not Gap, Gap is Preset
83-83 - C3500 Base, High Sierra, Sierra Classic
Do Not Gap, Gap is Preset; Light Duty
83-83 - Caballero Amarillo RWD, Diablo RWD, RWD
4 Electrode Platinum Resistor
83-87 - Caballero Base, Amarillo, Amarillo RWD, Diablo, Diablo RWD & more
Do Not Gap, Gap is Preset
83-95 - G1500 Rally, Rally Custom, Rally STX, Vandura
Do Not Gap, Gap is Preset
83-83 - G1500 Rally
Do Not Gap, Gap is Preset; Light Duty
Jeep
84-84 - Cherokee
Do Not Gap, Gap is Preset
85-86 - Cherokee 4WD Base, Chief, Laredo, Pioneer
Do Not Gap, Gap is Preset
85-86 - Cherokee RWD Base, Chief, Laredo, Pioneer
Do Not Gap, Gap is Preset
80-83 - CJ5 Base, Golden Eagle, Laredo, Limited, Renegade
Do Not Gap, Gap is Preset
83-83 - CJ7 4WD, Laredo 4WD, Limited 4WD, Renegade 4WD
4 Electrode L4 Resistor Platinum
83-83 - CJ7 4WD, Laredo 4WD, Limited 4WD, Renegade 4WD
Do Not Gap, Gap is Preset
86-86 - Comanche 4WD Custom, X, XLS
Do Not Gap, Gap is Preset
86-86 - Comanche RWD Custom, X, XLS
Do Not Gap, Gap is Preset
84-86 - Wagoneer Base, Limited
Do Not Gap, Gap is Preset
Lincoln
83-85 - Continental Base, Givenchy, Valentino
Do Not Gap, Gap is Preset
83-83 - Mark VI Base, Bill Blass, Pucci, Signature
Do Not Gap, Gap is Preset
84-92 - Mark VII Base, Bill Blass, LSC, Versace
Do Not Gap, Gap is Preset
85-85 - Mark VII Base, Bill Blass, LSC, Versace
Do Not Gap, Gap is Preset; Engine VIN: F
83-85 - Town Car Base, Cartier, Signature
Do Not Gap, Gap is Preset
Mercury
83-83 - Capri RS
Do Not Gap, Gap is Preset
84-85 - Capri RS
Do Not Gap, Gap is Preset; Engine VIN: M
83-83 - Cougar Base, LS
4 Electrode Platinum Resistor
84-93 - Cougar Base, LS, XR-7
Do Not Gap, Gap is Preset
83-83 - Grand Marquis Base, Colony Park, LS
4 Electrode Platinum Resistor
84-84 - Grand Marquis Base, Colony Park, LS
Do Not Gap, Gap is Preset
85-85 - Grand Marquis Base, Colony Park, LS
Do Not Gap, Gap is Preset; with High Output
86-86 - Grand Marquis Base, LS
Do Not Gap, Gap is Preset; with Police Package
85-85 - Marquis
Do Not Gap, Gap is Preset
Oldsmobile
91-94 - Bravada
Do Not Gap, Gap is Preset
85-87 - Calais Base, 500, ES, GT, Supreme
Do Not Gap, Gap is Preset
91-92 - Custom Cruiser
Do Not Gap, Gap is Preset
88-91 - Cutlass Calais Base, GT, S, SL
Do Not Gap, Gap is Preset
83-92 - Cutlass Ciera Base, Brougham, Cruiser LS, ES, GT & more
Do Not Gap, Gap is Preset
86-86 - Cutlass Ciera Brougham, ES, GT, Holiday, LS & more
Do Not Gap, Gap is Preset; Engine VIN: X
87-90 - Cutlass Cruiser Base, Brougham, Brougham LS, LS, SL
Do Not Gap, Gap is Preset
83-83 - Cutlass Supreme Base, Brougham
4 Electrode Platinum Resistor
84-87 - Cutlass Supreme Base, 442, Brougham, LS
Do Not Gap, Gap is Preset
84-85 - Delta 88 Royale, Royale Brougham, Royale Brougham LS
Do Not Gap, Gap is Preset
83-84 - Omega Base, Brougham, ES, ESC
Do Not Gap, Gap is Preset
83-84 - Omega Base, Brougham, ES, ESC
Do Not Gap, Gap is Preset; Engine VIN: X
90-94 - Silhouette
Do Not Gap, Gap is Preset
84-84 - Toronado Brougham
Do Not Gap, Gap is Preset
Plymouth
83-83 - Gran Fury
Do Not Gap, Gap is Preset
Pontiac
83-91 - 6000 Base, LE
Do Not Gap, Gap is Preset
83-86 - 6000 Base, LE, SE, STE
Do Not Gap, Gap is Preset; Engine VIN: X
83-86 - Bonneville Base, Brougham, LE
Do Not Gap, Gap is Preset
84-88 - Fiero Base, SE, Sport, Value Leader
Do Not Gap, Gap is Preset
83-95 - Firebird Base, Formula, S/E, Trans Am, Trans Am GTA
Do Not Gap, Gap is Preset
83-84 - Firebird Base, S/E
Do Not Gap, Gap is Preset; Engine VIN: 1
83-83 - Firebird Base, S/E, Trans Am
Do Not Gap, Gap is Preset; Engine VIN: H
Do Not Gap, Gap is Preset; Engine VIN: S
87-87 - Firebird Base, Trans Am
Do Not Gap, Gap is Preset; with Cast Iron Cylinder Head
85-91 - Grand Am Base, LE, SE, Value Leader
Do Not Gap, Gap is Preset
83-87 - Grand Prix Base, Brougham, LE, LJ
Do Not Gap, Gap is Preset
83-86 - Parisienne Base, Brougham, Brougham RWD, RWD
Do Not Gap, Gap is Preset
83-84 - Phoenix Base, LE, LJ
Do Not Gap, Gap is Preset
83-84 - Phoenix Base, LE, LJ, SE, SJ
Do Not Gap, Gap is Preset; Engine VIN: X
90-95 - Trans Sport
Do Not Gap, Gap is Preset