SPARK PLUGS

[FSETH]

Originally Posted by c4racer

yes - same exact PN NGK is on Amazon for $7.95 as the one recommended by BMW and sold by Bav Auto for $21.95. Seems strange.

BKR6EQUP

Amazon.com: NGK BKR6EQUP Multi-Ground Spark Plug , Pack of 1: Automotive

Those do not appear to be the BMW recommended part number. If you scroll down and look under Product Features, it lists part #3199.

Look at the photo of the BavAuto site I posted above. Although both Bosch plugs say FGR7DGQP, they have different part numbers for the OEM plugs and the Platimum 4 Plus plugs even though they are both labeled FGR7DGQP. Do you see what I mean? I would guess that although NGK makes OEM plugs, they (just like with Bosch) make other cheaper plugs that will fit, but are not OEM. The OEM recommended plugs from both NGK and Bosch are two or three times as much as the cheaper ones from the same brand.

Here are the exact plugs recommended by BMW for your 03 4.6is. Notice both supplemental part number don't match up with what Amazon has as their part #, but the OEM plugs from BavAuto and RealOEM.com do match.