Autolite AI3923 spark plug for the 2009-2012 Toyota Corolla 4-cylinder 2.4L and other vehicles ignites the air-fuel mixture in the cylinder. Its double precious metal design pairs an iridium center electrode with a platinum ground electrode and is intended to hold performance levels for longer.
- Iridium Ultra line with a laser-welded, iridium-enhanced fine-wire center electrode
- Proprietary platinum ground electrode that resists wear and extends plug life
- Tapered ground wire that enhances ignitability for improved combustion
- High alumina ceramic multi-rib insulator for thermal conductivity, insulation strength and flash-over prevention
- Copper core for higher thermal conductivity
- Resistor design with 4000 ohm resistance
Quick facts
- Part: Autolite AI3923 spark plug
- Fits: 2009-2012 Toyota Corolla 4-cylinder 2.4L and other vehicles
- Condition: New
Hard starting, a rough idle or misfires can mean the plugs are worn, though a weak ignition coil or a fuel injector problem can be behind them too, so find the cause before replacing the plugs.
Fits
The 2009-2012 Toyota Corolla 4-cylinder 2.4L, the 1990-1991 Toyota Camry V6 2.5L, the 1992-2001 Camry 4-cylinder 2.2L, the 1992-2006 Camry V6 3.0L, the 2002-2011 Camry 4-cylinder 2.4L, the 2004-2006 Camry V6 3.3L and the 2000-2004 and 2010-2012 Subaru Outback H4 2.5L are among the vehicles this spark plug fits, along with many others. The 2009-2012 Toyota Corolla 4-cylinder 2.4L takes four plugs, and the count varies by engine on other vehicles, so buy enough for a full set.
Specifications
Fit and size
- Thread: M14 - 1.25, 14 mm diameter, metric
- Reach: 0.75 in (19 mm)
- Hex size: 5/8 in
- Seat: flat, with crush washer
- Manufacturer heat range: 10
- Quantity per vehicle: varies by engine
Build and materials
- Center electrode: fine wire, mid projection, iridium tip, copper core
- Ground electrode: taper cut, platinum tip, nickel core
- Insulator: ceramic
- Resistor: yes, 4000 ohm
- Terminal: non-removable nut
- Warranty: Autolite lifetime limited warranty
- Country of origin: Mexico
In the box
One spark plug with a crush washer.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right spark plug for a 2009-2012 Toyota Corolla 4-cylinder 2.4L?
Yes, Autolite AI3923 fits the 2009-2012 Toyota Corolla 4-cylinder 2.4L, which takes four. If your own car is not named on this page, look it up in the "Vehicles it fits" section.
Is this the spark plug for a 2002-2011 Toyota Camry 4-cylinder 2.4L?
Yes, this plug fits the 2002-2011 Toyota Camry 4-cylinder 2.4L, and that engine takes four plugs.
What thread size and reach does this Autolite spark plug have?
Autolite AI3923 has an M14 - 1.25 thread and a 0.75 in (19 mm) reach. It has a 5/8 in hex and a flat seat with a crush washer.
Is this an Autolite double platinum spark plug?
No. This Iridium Ultra plug has an iridium tip and a copper core on the center electrode, and a platinum tip and a nickel core on the ground electrode.
What can worn spark plugs look like when I pull them out?
With the engine off and cool, a worn-down electrode tip or a cracked ceramic insulator can show wear. Hard starting, a rough idle or a misfire can also point to worn plugs.
