NGK Iridium IX Spark Plug (LTR6IX-11): Extreme Ignitability & Durability, 6509
In stock
$17.99
Listed as compatible with this vehicle by the retailer feed.
Check price2009 Cadillac CTS Spark Plugs
30 products listed for this model year in the retailer catalog. Check engine and trim details before ordering.
NGK Ruthenium HX Spark Plug (LTR6AHX): High Ignitability & Durability, 91276
In stock
$19.49
Listed as compatible with this vehicle by the retailer feed.
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NGK Laser Iridium Spark Plug (ILTR6E11): Fine Wire Tip for High Efficiency, 90117
In stock
$21.49
Listed as compatible with this vehicle by the retailer feed.
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Bosch OE Fine Wire Double Iridium Spark Plug: High Performance & Longevity, 9602
In stock
$12.49
Listed as compatible with this vehicle by the retailer feed.
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Autolite Double Platinum Spark Plug: Enhanced Durability & Performance, APP5243
Out of stock
$7.49
Listed as compatible with this vehicle by the retailer feed.
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Autolite Iridium Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP5243
Out of stock
$11.49
Listed as compatible with this vehicle by the retailer feed.
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This site contains affiliate links. We may earn a commission if you buy through them. We do not sell these products or guarantee merchant inventory. Compatibility is listed by the retailer feed for this vehicle; it is not an OEM confirmation. Catalog snapshot: Aug 15, 2026.