►After decades of producing high-revving, naturally aspirated engines, BMW M joined the rest of the performance world with their turbocharged S55B30. Within a short time, the disappointment over the addition of boost was forgotten as the S55 proved to be similarly characterful and much more powerful than any of its predecessors. A decade after its debut, the S55 is as popular as ever with enthusiasts and is readily available in three chassis.

Regardless of what BMW it's stuffed into, each S55 will need the same care and attention. It's a strong engine; we have to give it that, but more than a few areas go wrong with regularity. It's important to know the pitfalls and what to look out for, whether you're an owner or a buyer, so we've pulled our BMW expert away from expanding our catalog to take you through the ins and outs of this boosted BMW.

Follow along with Gareth Foley, FCP Euro's BMW Expert, as he dives into the BMW S55 engine and lays out all of the good and bad, once and for all.

00:00 - Intro
01:23 - Oil Pan. Oil Filter Housing & Oil Cooler
02:48 - Valve cover
05:53 - Oil Cooler
07:28 - Basic Maintenance and Things to be Aware of
07:45 - Drive Belt System
08:39 - Valvetronic System
17:54 - Charge Air Cooler
21:05 - Oil Filter Housing Cap
23:30 - Ignition System
25:28 - S55 Crank Hub
29:34 - Cooling System
34:29 - Turbo System
37:00 - Wrap-up

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