Spread the love. The BMW i4 comes with a few different audio configurations, with the top-spec Harman Kardon system bolstering the number of speakers found within the cabin. The 16-speaker 464-Watt combination makes for an engaging and lively reproduction making it one of the best audio systems we’ve reviewed to date. Complete walkthrough of installing an Amp with two 12-inch Subs and a Capacitor on BMW e46 body. This will be the same for all e46 cars with the Harmon Kardon factory system included with many BMW 3 Series Models. I believe the following are included in this group: BMW 316 (316i, 316ti) BMW 318 (318i, 318ci, 318ti) BMW 320 (320i, 320ci) BMW USA is charging an extra $950, regardless if you go for a gas model (530i, 530i xDrive) or the purely electric variants (i5 eDrive40, i5 M60). As for the car itself, the 5 Series kicks off at markusmarkus. 12982 posts · Joined 2008. #2 · May 2, 2020 (Edited) Go to www.crutchfield.com and see what fits. The HK system used the same head unit as the HiFi system. The HK is in the amp, the wiring and the speakers. I’m partial to Alpine, which made the E46 head unit and non-HK amp from model year 2003 on. XBimmers | BMW X3 Forum • BMW X3/X4 Forums (2018 - 2024) • BMW X3 (G01) / X4 (G02) Forum • Retrofit Harman Kardon to base audio system Google Search Search Forums 1) Nav system and the business professional radio that comes with it (I like it's looks, it's simple and large controls and the steering wheel connection) 2) MB-Quart PSD 216 6.5" component speakers (replaces the front door stock speakers) 3) JL Audio SB-B-3SER99/8IB4 Stealthbox that is designed for the E46 and consists of two 8" subwoofers in item 4 01-06 BMW E46 M3 Convertible Harman/Kardon Set Of Rear Quarter Speakers OEM 7214 01-06 BMW E46 M3 Convertible Harman/Kardon Set Of Rear Quarter Speakers OEM 7214 $89.99 +$13.68 shipping So, as others suggested, the BMW 53 amplifier in the truck is definitely bad. The Fix: The BMW dealer said a new BMW 53 would be $900. Look like a company called 'Bimmernav' sells refurbished units for $585. And they are going for quite a bit less than that on auction sites. Thanks for the responses. Car_Guy 3rDV.