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Bosch Iridium Spark Plug | 9657

Buick, Cadillac, Chevrolet, Ford, GMC, Lincoln, Mazda, Mercedes, Mercury, Oldsmobile & more
$7.69
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$8.01
List
$15.08
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Make Sure It Fits

P/N: 9657 Bosch Iridium OEM
Description:
Bosch original equipment design with ultra-fine wire iridium center electrode and iridium-platinum tapered ground electrode deliver optimum performance and durability.
Cross References:
  • 02422305240P6
  • 73918046111
  • W01331933517

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.

Frequently Viewed Together

We found 10 additional part(s) that are frequently viewed together.

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What This Bosch Iridium 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
86-88 - Century Custom, Estate Wagon, Limited, T-Type
IRIDIUM OE FINEWIRE
86-87 - Electra Limited, Park Avenue, T-Type
IRIDIUM OE FINEWIRE
86-86 - LeSabre Custom, Limited
IRIDIUM OE FINEWIRE
86-87 - Riviera Luxury, T-Type
IRIDIUM OE FINEWIRE
86-88 - Skylark Custom, Limited
IRIDIUM OE FINEWIRE
86-87 - Somerset Custom, Limited, T-Type
IRIDIUM OE FINEWIRE
85-85 - Somerset Regal Base, Limited
IRIDIUM OE FINEWIRE
Cadillac
82-83 - DeVille Base, Cabriolet, d'Elegance
Do Not Gap, Gap is Preset
82-83 - Eldorado Base, Biarritz, Cabriolet, Touring
Do Not Gap, Gap is Preset
82-83 - Fleetwood Brougham, Brougham d'Elegance
Do Not Gap, Gap is Preset
82-83 - Seville Base, Elegante
Do Not Gap, Gap is Preset
Chevrolet
99-02 - Cavalier Base, LS, LS Sport, RS, Z24
Do Not Gap, Gap is Preset
98-02 - Cavalier Base, LS, LS Sport, RS, Z24
Do Not Gap, Gap is Preset; Engine VIN: 4
02-02 - Cavalier Base, LS, LS Sport, Z24
IRIDIUM OE FINEWIRE L4
99-99 - Malibu
Do Not Gap, Gap is Preset
97-98 - S10 ZR2
Do Not Gap, Gap is Preset
96-99 - S10 SS, Xtreme, ZR2
Do Not Gap, Gap is Preset; Engine VIN: 4
00-00 - S10 Xtreme, ZR2
Do Not Gap, Gap is Preset; Engine VIN: 4
Do Not Gap, Gap is Preset; Engine VIN: 5
01-02 - S10 Xtreme, ZR2, ZR5
Do Not Gap, Gap is Preset; Engine VIN: 5
03-03 - S10 Xtreme, ZR2, ZR5
Do Not Gap, Gap is Preset; Engine VIN: H
95-95 - S10 SS, ZR2
IRIDIUM OE FINEWIRE L4
97-98 - S10 4WD Base, LS
Do Not Gap, Gap is Preset
96-99 - S10 4WD Base, LS
Do Not Gap, Gap is Preset; Engine VIN: 4
00-00 - S10 4WD Base, LS
Do Not Gap, Gap is Preset; Engine VIN: 4
Do Not Gap, Gap is Preset; Engine VIN: 5
01-02 - S10 4WD Base, LS
Do Not Gap, Gap is Preset; Engine VIN: 5
03-03 - S10 4WD Base, LS
Do Not Gap, Gap is Preset; Engine VIN: H
95-95 - S10 4WD Base, LS
IRIDIUM OE FINEWIRE L4
99-99 - S10 FWD
Do Not Gap, Gap is Preset; Engine VIN: 4
00-00 - S10 FWD
Do Not Gap, Gap is Preset; Engine VIN: 4
Do Not Gap, Gap is Preset; Engine VIN: 5
97-98 - S10 FWD
IRIDIUM OE FINEWIRE L4
Ford
86-86 - Aerostar Base, XL, XLT
Do Not Gap, Gap is Preset
84-85 - Bronco II Base, Eddie Bauer, XLS, XLT
Do Not Gap, Gap is Preset
85-85 - Bronco II Base, Eddie Bauer, XLS, XLT
IRIDIUM OE FINEWIRE
86-90 - Bronco II 4WD Base, Eddie Bauer, XL, XL Sport, XLT & more
Do Not Gap, Gap is Preset
86-86 - Bronco II 4WD Base, Eddie Bauer, XLT
IRIDIUM OE FINEWIRE
86-90 - Bronco II RWD Base, Eddie Bauer, XL, XL Sport, XLT & more
Do Not Gap, Gap is Preset
86-86 - Bronco II RWD Base, Eddie Bauer, XLT
IRIDIUM OE FINEWIRE
80-82 - Courier 4WD Base, XLT
Do Not Gap, Gap is Preset
80-80 - Courier 4WD Base, XLT
Do Not Gap, Gap is Preset; Engine VIN: C
80-82 - Courier RWD Base, XLT
Do Not Gap, Gap is Preset
80-80 - Courier RWD Base, XLT
Do Not Gap, Gap is Preset; Engine VIN: C
06-08 - Escape 4WD Hybrid, XLS, XLT
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
05-05 - Escape 4WD Hybrid, XLS, XLT, XLT No Boundaries
Do Not Gap, Gap is Preset; Original Equipment Is Iridium; Engine VIN: Z
07-08 - Escape 4WD Limited, XLT
IRIDIUM OE FINEWIRE
06-08 - Escape FWD Hybrid, XLS, XLT
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
05-05 - Escape FWD Hybrid, XLS, XLT, XLT No Boundaries
Do Not Gap, Gap is Preset; Original Equipment Is Iridium; Engine VIN: Z
07-08 - Escape FWD Limited, XLT
IRIDIUM OE FINEWIRE
80-82 - Fairmont Base, Futura, S
Do Not Gap, Gap is Preset
05-07 - Focus ST, ZX4 ST
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
GMC
95-03 - Sonoma 4WD SL, SLE, SLS
Do Not Gap, Gap is Preset
95-03 - Sonoma RWD SL, SLE, SLS
Do Not Gap, Gap is Preset
Lincoln
00-02 - LS Base, LSE
IRIDIUM OE FINEWIRE
Mazda
04-05 - 3 i, S, SP23
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
06-07 - 5 Grand Touring, Sport, Touring
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
03-05 - 6 i
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
03-08 - 6 S
IRIDIUM OE FINEWIRE
91-91 - Navajo LX
IRIDIUM OE FINEWIRE
92-92 - Navajo 4WD DX, LX
IRIDIUM OE FINEWIRE
92-92 - Navajo RWD DX, LX
IRIDIUM OE FINEWIRE
08-08 - Tribute 4WD Hybrid, i
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
05-06 - Tribute AWD i
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
05-08 - Tribute FWD Hybrid, i
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
Mercedes
84-93 - 190E 2.3, 2.3-16, 2.6
87-89 - 260E
88-89 - 300CE
86-93 - 300E Base, 2.6, 4Matic
93-93 - 300E Base, 2.8
IRIDIUM OE FINEWIRE
88-91 - 300SE
88-91 - 300SEL
88-93 - 300TE Base, 4Matic
93-93 - 300TE
IRIDIUM OE FINEWIRE
Mercury
80-80 - Bobcat Base, Runabout, Villager
Do Not Gap, Gap is Preset
82-82 - Capri Base, Black Magic, GS, L
Do Not Gap, Gap is Preset
80-81 - Capri Ghia, GS RWD, RWD
Do Not Gap, Gap is Preset; Engine VIN: A
81-81 - Cougar
Do Not Gap, Gap is Preset
06-06 - Mariner Hybrid
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
05-08 - Mariner 4WD Base, Convenience, Hybrid
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
08-08 - Mariner 4WD Base, Premier
IRIDIUM OE FINEWIRE
05-08 - Mariner FWD Base, Convenience, Hybrid
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
08-08 - Mariner FWD Base, Premier
IRIDIUM OE FINEWIRE
88-94 - Topaz GS, GS AWD, LS, LS AWD, LTS & more
Do Not Gap, Gap is Preset
80-82 - Zephyr Base, GS, Z7
Do Not Gap, Gap is Preset
Oldsmobile
00-01 - Alero GL, GLS, GX
Do Not Gap, Gap is Preset
01-02 - Aurora
Do Not Gap, Gap is Preset
85-87 - Calais Base, 500, ES, GT, Supreme
IRIDIUM OE FINEWIRE
88-88 - Cutlass Calais Base, GT, SL
IRIDIUM OE FINEWIRE
86-88 - Cutlass Ciera Base, Brougham, ES, GT, Holiday & more
IRIDIUM OE FINEWIRE
87-88 - Cutlass Cruiser Brougham, Brougham LS, LS, SL
IRIDIUM OE FINEWIRE
86-87 - Delta 88 Royale, Royale Brougham
IRIDIUM OE FINEWIRE
99-02 - Intrigue GL, GLS, GX
Do Not Gap, Gap is Preset
86-87 - Toronado Brougham, Trofeo
IRIDIUM OE FINEWIRE
Pontiac
87-87 - Bonneville Base, LE
IRIDIUM OE FINEWIRE
89-89 - Firebird Trans Am, Trans Am GTA SE
Do Not Gap, Gap is Preset
99-01 - Grand Am GT, GT1, SE, SE1, SE2
Do Not Gap, Gap is Preset
85-87 - Grand Am Base, LE, SE
IRIDIUM OE FINEWIRE
89-90 - Grand Prix Base, LE, Mclaren, SE, SE FWD & more
Do Not Gap, Gap is Preset; Engine VIN: V
98-02 - Sunfire GT, SE
Do Not Gap, Gap is Preset
99-01 - Sunfire GT, SE
Do Not Gap, Gap is Preset; Engine VIN: T