A 2003 Ford Focus requires an HSB063 12-volt battery with top posts and cranking amps of at least 590. Popular brands include Super Start, Motorcraft, and Optima.
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According to the 2003 Ford Focus Owner Guide ( for North America )
2.0L SPI ( Motorcraft BXT-40R )
2.0L Zetec ( BXT-96R )
2.3 PZEV ( BXT-96R )
Those were the batteries that came in the vehicles from the factory
( BCI group size 40R and 96R )
The 2003 Ford Focus has a 2.0 L base engine size.
The 2003 Ford Focus has an inline 4 engine.
The battery group is 65N for a 2003 Ford Windstar
19mm
A 100 type battery according to Pure Tyre
A 2008 Ford Focus ( North America ) uses a BCI group size ( 96R battery ) It came from the factory with the Motorcraft BXT-96R / 590 cold cranking amps
195 16r 15
195/60 R15 is factory size
Fords " top of the line " battery for a 2003 F-150 is the Motorcraft BXT - 65 - 650
A 017 battery normally costing around £79.95
According to the 2003 Ford Mustang Owner Guide : It came from the factory with the ( Motorcraft BXT- 59 battery ) * that's BCI group size 59 *
t6 or t8 torx