NGK 3903 spark plug for the 1985 Honda Accord 4-cylinder 1.8L and other vehicles lights the air-fuel mixture in each cylinder. It is an NGK iridium spark plug from the Iridium IX line, recommended for modified or high performance applications or as an upgrade to OE nickel alloy plugs.
- Fine wire 0.6 millimeter iridium tip on the center electrode for a stable spark
- Iridium alloy center electrode with a density six times that of platinum and a very high melting point
- Tapered cut ground electrode with a reduced quenching design for improved ignitability and acceleration
- Solid copper core, 98% pure copper, for heat dissipation and conductivity across wide heat ranges
- Trivalent metal plating that resists corrosion and seizing for easier installation and removal
Quick facts
- Part: NGK 3903 spark plug
- Fits: 1985 Honda Accord 4-cylinder 1.8L and other vehicles
- Condition: New
A worn or fouled plug can show up as hard starting, a rough idle or a misfire. Before you replace these plugs, rule out the ignition coils, plug wires, fuel delivery and vacuum leaks, since any of them can also make an engine misfire or idle roughly.
Fits
The 1985 Honda Accord 4-cylinder 1.8L, the 1985-1987 Honda Civic 4-cylinder 1.5L, the 1989-1991 Hyundai Sonata 4-cylinder 2.4L and the 1992-1998 Sonata 4-cylinder 2.0L all take this plug, along with many other vehicles. If your car is not named here, look it up on the Buyer's Guide tab. The 1985 Honda Accord 4-cylinder 1.8L takes four plugs, one per cylinder; the quantity varies by engine on other applications.
Specifications
Fit and size
- Quantity per vehicle: varies by engine
- Thread size: M14 - 1.25
Build and materials
- Metallurgy: single iridium
- Center electrode: fine wire iridium tip
- Ground electrode: tapered cut
- Core: solid copper
- Plating: trivalent metal
- NGK part number: BPR6EIX-11
- Condition: New
Interchange: BPR6EIX-11
