BOSCH 4478
BOSCH part number 4478 is a spark plug in the Ignition system. This catalog matches it to 19 year-and-engine configurations from 1988 to 2018.
Verified fitment includes 2018 Acura RDX 3.5L V6 ; 2017 Acura RDX 3.5L V6 ; 2016 Acura RDX 3.5L V6 ; 2015 Acura RDX 3.5L V6 ; 2014 Acura RDX 3.5L V6 , plus 14 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is BOSCH 4478?
BOSCH part number 4478 is a spark plug with published application data for 19 vehicle configurations from 1988 to 2018. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does BOSCH 4478 fit?
This catalog matches 4478 to 19 year-and-engine configurations from 1988 to 2018. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is BOSCH 4478 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. BOSCH 4478 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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