9612 Bosch Iridium Spark Plug
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Bosch Iridium Spark Plug | 9612

Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, Saturn
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P/N: 9612 Bosch Iridium
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:
  • 02422256610P6
  • W01331933514

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 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
87-93 - Century Custom, Estate Wagon, Limited, Special
Do Not Gap, Gap is Preset
09-11 - Lucerne CX, CXL, CXL Special Edition
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
88-93 - Regal Custom, Gran Sport, Limited
Do Not Gap, Gap is Preset
89-89 - Skyhawk Custom, SE
Do Not Gap, Gap is Preset
87-88 - Skyhawk Custom, Custom FWD, Limited FWD, SE, Sport FWD & more
Do Not Gap, Gap is Preset; Engine VIN: 1
07-07 - Terraza CX, CXL
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
06-06 - Terraza AWD CX, CXL
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
06-06 - Terraza FWD CX, CXL
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
Cadillac
87-88 - Cimarron
Do Not Gap, Gap is Preset
Chevrolet
04-06 - Avalanche 2500 Base, LS, LT
Do Not Gap, Gap is Preset
02-03 - Avalanche 2500 4WD
Do Not Gap, Gap is Preset
02-03 - Avalanche 2500 RWD
Do Not Gap, Gap is Preset
87-93 - Beretta Base, GT, GTZ, Indianapolis 500 Pace Car
Do Not Gap, Gap is Preset
87-94 - Cavalier Base, CS, RS, VL, Z24
Do Not Gap, Gap is Preset
87-90 - Celebrity Base, CL, Estate, Eurosport
Do Not Gap, Gap is Preset
87-93 - Corsica Base, LT, LTZ
Do Not Gap, Gap is Preset
01-02 - Express 3500 Base, LS
Do Not Gap, Gap is Preset
06-11 - Impala 50th Anniversary Edition, LS, LT, LTZ, Police
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
90-94 - Lumina Base, Euro
Do Not Gap, Gap is Preset
06-10 - Malibu Classic LS, Classic LT, LS, LT, LTZ & more
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
06-07 - Monte Carlo LS, LT, LTZ
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
01-06 - Silverado 2500 HD 4WD Base, LS, LT, WT
Do Not Gap, Gap is Preset
01-06 - Silverado 2500 HD RWD Base, LS, LT, WT
Do Not Gap, Gap is Preset
01-06 - Silverado 3500 4WD Base, LS, LT, WT
Do Not Gap, Gap is Preset
01-06 - Silverado 3500 RWD Base, LS, LT, WT
Do Not Gap, Gap is Preset
01-06 - Suburban 2500 4WD Base, LS, LT
Do Not Gap, Gap is Preset
01-06 - Suburban 2500 RWD Base, LS, LT
Do Not Gap, Gap is Preset
07-08 - Uplander Base, LS, LT
Do Not Gap, Gap is Preset; Original Equipment Is Iridium; Engine VIN: 1
Do Not Gap, Gap is Preset; Original Equipment Is Iridium; Engine VIN: W
GMC
01-02 - Savana 3500 Base, SLT
Do Not Gap, Gap is Preset
01-06 - Sierra 2500 HD 4WD Base, SL, SLE, SLT, WT
Do Not Gap, Gap is Preset
01-06 - Sierra 2500 HD RWD Base, SL, SLE, SLT, WT
Do Not Gap, Gap is Preset
01-06 - Sierra 3500 4WD Base, SL, SLE, SLT, WT
Do Not Gap, Gap is Preset
01-06 - Sierra 3500 RWD Base, SL, SLE, SLT, WT
Do Not Gap, Gap is Preset
01-06 - Yukon XL 2500 4WD SLE, SLT
Do Not Gap, Gap is Preset
01-06 - Yukon XL 2500 RWD SLE, SLT
Do Not Gap, Gap is Preset
Oldsmobile
87-93 - Cutlass Ciera Base, Brougham, GT, LS, S & more
Do Not Gap, Gap is Preset
87-89 - Cutlass Cruiser Base, Brougham, Brougham LS, LS, SL
Do Not Gap, Gap is Preset
88-92 - Cutlass Supreme Base, Indy 500 Pace Car, International, S, SL
Do Not Gap, Gap is Preset
93-93 - Cutlass Supreme Base, International, S
Do Not Gap, Gap is Preset; Engine VIN: T
87-88 - Firenza Cruiser FWD, FWD, LC FWD, LX FWD, S FWD
2.0L IRIDIUM OE FINEWIRE L4
87-87 - Firenza GT
Do Not Gap, Gap is Preset
Pontiac
87-91 - 6000 Base, LE, SE, Special Edition, STE
Do Not Gap, Gap is Preset
88-90 - 6000 AWD Special Edition, STE
Do Not Gap, Gap is Preset
88-90 - 6000 FWD Special Edition, STE
Do Not Gap, Gap is Preset
06-10 - G6 Base, GT, GTP
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
88-93 - Grand Prix Base, GT, LE, SE, STE
Do Not Gap, Gap is Preset
89-90 - Grand Prix Base, LE, Mclaren, SE, SE FWD & more
Do Not Gap, Gap is Preset; Engine VIN: T
06-06 - Montana AWD SV6
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
06-06 - Montana FWD SV6
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
91-94 - Sunbird GT, LE, LE Value Leader, SE
Do Not Gap, Gap is Preset
Saturn
07-08 - Aura XE
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
08-09 - Vue AWD XE
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
10-10 - Vue AWD XE
IRIDIUM OE FINEWIRE
08-09 - Vue FWD XE
Do Not Gap, Gap is Preset; Original Equipment Is Iridium
10-10 - Vue FWD XE
IRIDIUM OE FINEWIRE