DENSO 4509
DENSO part number 4509 is a spark plug in the Ignition system. This catalog matches it to 28 year-and-engine configurations from 1970 to 1989.
Verified fitment includes 1989 Geo Spectrum 1.5L L4 ; 1989 Geo Spectrum 1.5L L4 Turbocharged ; 1985 Avanti Ii 5.0L 305cid V8 ; 1984 Avanti Ii 5.0L 305cid V8 ; 1983 Avanti Ii 5.0L 305cid V8 , plus 23 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is DENSO 4509?
DENSO part number 4509 is a spark plug with published application data for 28 vehicle configurations from 1970 to 1989. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does DENSO 4509 fit?
This catalog matches 4509 to 28 year-and-engine configurations from 1970 to 1989. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is DENSO 4509 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. DENSO 4509 is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.
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