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Bosch Spark Plug; Yttrium; Dual Electrode | 7402

Audi, BMW, Land Rover, Mercedes, Porsche, Suzuki, VW
In Stock Status
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Make Sure It Fits

P/N: 7402 Bosch OEM
Yttrium; Dual Electrode
Enhanced yttrium version. Updated version for original OE plugs F7LDCR, F7LTCR, and FR7LDC. Pregapped for normal usage.
Cross References:
  • 0242235668
  • 0242235668000
  • 101000051AA
  • 101000063AA
  • 12129059795
  • 12129063428
  • 12129064617
  • 7402FR7LDC
  • 99917020190
  • F03DAR
  • F04DAR
  • F7LDCR
  • F7LTCR
  • FR7LDC
  • FR7LDC4
  • W01331638133
  • W01331640493
  • W01331824003
  • W01331850825

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.

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 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.

92-94 - 100 Base, CS, S
OE Plug;
92-94 - 100 Quattro CS, S
OE Plug;
93-95 - 90 Base, CS, S, Sport
OE Plug;
93-95 - 90 Quattro Base, Sport
OE Plug;
07-07 - A3
Do Not Gap, Gap is Preset
08-08 - A4
97-06 - A4 , B5, B6, Base, Cabriolet
4 per car.
98-01 - A4 Base, Avant
6 per car.
99-99 - A4
4 per car.
06-07 - A4
Do Not Gap, Gap is Preset
96-97 - A4
OE Plug;
07-07 - A4 Quattro Avant, Cabriolet
97-05 - A4 Quattro Base, Avant, B5, B6, Cabriolet
4 per car.
98-01 - A4 Quattro Base, Avant
6 per car.
99-99 - A4 Quattro Avant
4 per car.
05-08 - A4 Quattro
Do Not Gap, Gap is Preset
96-98 - A4 Quattro
OE Plug;
01-01 - A6
6 per car.
98-00 - A6
6 per car. OE Plug;
91-98 - 318i E30, E36
OE Plug;
91-97 - 318iC E30
OE Plug;
91-97 - 318is E36
OE Plug;
95-98 - 318ti
OE Plug;
98-98 - 323iC
OE Plug;
98-98 - 323is
OE Plug;
92-95 - 325i E36
OE Plug;
93-95 - 325iC
OE Plug;
92-95 - 325is E36
OE Plug;
96-98 - 328i
OE Plug;
96-98 - 328iC
OE Plug;
96-98 - 328is
OE Plug;
91-95 - 525i
OE Plug;
93-95 - 525iT
OE Plug;
99-99 - 528i
Do Not Gap, Gap is Preset
97-98 - 528i
OE Plug;
99-99 - 528iT
Do Not Gap, Gap is Preset
94-95 - 530i
OE Plug;
94-95 - 530IT
OE Plug;
Land Rover
03-05 - Range Rover HSE
Do Not Gap, Gap is Preset; Replacement interval 40,000 km
07-07 - C230 Sport
99-08 - 911 40th Anniversary Edition, Carrera, Carrera 4, Carrera 4S, Carrera S & more
00-08 - Boxster Base, Limited Edition, Roadster, Roadster S, S & more
97-97 - Boxster
6 per car.
98-99 - Boxster
OE Plug;
06-08 - Cayman Base, S
04-06 - Verona Base, EX, Luxury, LX, S
Do Not Gap, Gap is Preset
99-04 - Beetle Base, Turbo, Turbo S
4 per car.
05-05 - Beetle Turbo S
4 per car.
98-00 - Beetle
OE Plug;
00-03 - Golf Base, GTI, GTI 1.8T, GTI GLS, Turbo
4 per car.
04-06 - Golf GTI 1.8T
4 per car.
00-01 - Golf Base, GTI GLS
OE Plug;
99-99 - Golf MK4 GL, GLS, GTI
OE Plug;
00-03 - Jetta GLS, Turbo
4 per car.
03-04 - Jetta GLI, GLS, GLS Turbo
4 per car.
00-01 - Jetta GL, GLS
OE Plug;
05-05 - Jetta IV Turbo
4 per car.
99-99 - Jetta MK4 GL, GLS
OE Plug;
02-05 - Passat Base, 4 MOTION, W8
00-04 - Passat
4 per car.
01-05 - Passat Base, 4 MOTION, 4MOTION, GLX 4 Motion
6 per car.
98-00 - Passat Base, GLS
6 per car. OE Plug;
05-05 - Passat
4 per car.
98-99 - Passat GLS, Turbo
4 per car. OE Plug;
04-06 - Phaeton V8, V8 Turbo
8 per car.
04-07 - Touareg
8 per car.