Bosch 7992 spark plug for the 1989-1991 Porsche 944 4-cylinder 3.0L and other vehicles ignites the air-fuel mixture in the cylinder. The center electrode of this Bosch spark plug gives up to 50% longer performance life than standard copper plugs.
- Nickel with Copper-Core Bosch plugs use a yttrium-enhanced nickel-copper center electrode
- Copper core gives a broader heat range to resist pre-ignition and fouling
- Nickel-plated rolled threads resist corrosion and do not require anti-seize
- Angled, ribbed insulator design prevents misfire from flash-over
- Metal glass fused resistor suppresses interference
Quick facts
- Part: Bosch 7992 spark plug
- Fits: 1989-1991 Porsche 944 4-cylinder 3.0L and other vehicles
- Condition: New
A worn plug can show up as hard starting, a rough idle or a misfire. Those signs also come from other ignition or fuel faults, so before replacing the plug, look with the engine off and cool at the plug boots and wires for cracks or oil, and read the electrode and insulator of the old plug when it comes out.
Fits
The 1989-1991 Porsche 944 4-cylinder 3.0L and the 1989-1990 Maserati 228i take this plug, and it works as a Lotus Esprit spark plug for the 1989-1990 4-cylinder 2.2L, along with other vehicles. Each cylinder gets one plug, so the count is four, six or eight depending on the engine. If your car is not named here, look it up in the "Vehicles it fits" section.
Specifications
Fit and size
- Quantity per vehicle: one per cylinder (4, 6 or 8 depending on the engine)
- Package quantity: 1
- Insulator type: Non-projected
Build and materials
- Spark plug type: 4-cycle
- Center electrode: yttrium-enhanced nickel-copper with a copper core
- Threads: nickel-plated, rolled
- Resistor: Yes, metal glass fused
- Condition: New
In the box
One spark plug.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this Porsche 944 spark plug right for the 1989-1991 4-cylinder 3.0L engine?
Yes. Bosch 7992 is listed for the 1989-1991 Porsche 944 4-cylinder 3.0L, which takes four plugs, one per cylinder.
Does the Bosch 7992 come as one plug or a set?
One. The package holds a single spark plug, so order one for each cylinder of your engine.
Is the Bosch 7992 a resistor plug?
Yes. It has a metal glass fused resistor for interference suppression, and its insulator is non-projected.
How can I tell if a spark plug like the Bosch 7992 is worn?
Hard starting, a rough idle or a misfire can be signs of a worn plug. With the engine off and cool, look at the removed plug for a cracked insulator or a badly worn electrode.
What is the center electrode of the Bosch 7992 made of?
Bosch 7992 has a yttrium-enhanced nickel-copper center electrode with a copper core, a conventional nickel-copper design.
