Autolite AP5145 spark plug for the 1983-1990 Ford Mustang 4-cylinder 2.3L, the 1984-1986 Mustang V6 3.8L, the 1986 Mustang V8 5.0L and other vehicles ignites the air-fuel mixture in the cylinder. This Autolite spark plug suits older engine applications and designs.
- Autolite Platinum series with a platinum center electrode firing tip
- Platinum design for quicker firing, smoother starts and improved fuel efficiency
- Platinum firing tip prevents gap erosion for longer service life
- High alumina ceramic insulator for thermal conductivity and insulation strength
- Multi-rib insulator prevents flash-over
- Nickel-plated shell resists corrosion for extended life
Quick facts
- Part: Autolite AP5145 spark plug
- Fits: the 1983-1990 Ford Mustang 4-cylinder 2.3L, the 1984-1986 Mustang V6 3.8L, the 1986 Mustang V8 5.0L and other vehicles
- Condition: New
A weak ignition coil, a worn plug wire or a fuel delivery fault can be behind hard starting, a rough idle or a misfire, so find the cause before buying plugs. If worn plugs are the cause, this one replaces them.
Fits
This plug fits many Ford, Lincoln and Mercury models, including the 1985-1988 Ford Ranger 4-cylinder 2.3L and, as a Ford Taurus spark plug, the 1988-1995 model with the V6 3.8L. If your car is not named here, find it in the "Vehicles it fits" section.
Specifications
Fit and size
- Thread: M14 - 1.25, metric, 14 mm diameter
- Hex size: 5/8 in
- Seat type: tapered
- Pre-gap: 0.054 in (1.4 mm)
- Heat range: 8
- Center electrode projection: long projection
- Center electrode insulator tip projection: 4.4 mm (0.172 in)
- Insulator height: 51.6 mm (2.032 in)
- Quantity per vehicle: varies by engine
Build and materials
- Center electrode: platinum tip, copper core
- Ground electrode: 1, nickel tip and nickel core
- Insulator: ceramic
- Resistor: yes, 4000 ohm
- Terminal: non-removable nut
- Condition: New
- Warranty: Autolite 4 year limited warranty
- Country of origin: Mexico
In the box
One spark plug; a washer is not included. The 4-cylinder 2.3L takes four, the V6 3.8L six and the V8 5.0L eight.
Interchange: TR5-1GP
11 · 6709 · 2U7E12405GA · AWSF44C · AWSF44P · 6105 · AGSF44FM · AWSF44E · AWSF44EG · SP409 · SP482
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
11, 6709, 2U7E12405GA, AWSF44C, AWSF44P, 6105, AGSF44FM, AWSF44E, AWSF44EG, SP409, SP482, TR5-1GP
Frequently Asked Questions
Are these Ford Ranger spark plugs right for a 1985-1988 Ranger with the 4-cylinder 2.3L?
Yes. Autolite AP5145 fits the 1985-1988 Ford Ranger 4-cylinder 2.3L, which takes four plugs. For another model, find your car in the "Vehicles it fits" section.
Is this a Ford Mustang spark plug for the 1994-1997 V6 3.8L?
Yes. Autolite AP5145 fits the 1994-1997 Ford Mustang V6 3.8L, which takes six plugs.
What are the heat range and pre-gap of this platinum spark plug?
The heat range is 8, and the plug comes pre-gapped at 0.054 in (1.4 mm). The thread is M14 - 1.25 with a 5/8 in hex.
How can I tell when a platinum spark plug is wearing out?
Hard starting, a rough idle or a misfire can be signs of a worn plug. With the engine off and cool, a removed plug may show an eroded tip or a wide gap.
Does the Autolite AP5145 replace part number SP409?
Yes. SP409 is one of the other part numbers that Autolite AP5145 replaces.
