P0362

P0362 is the cylinder 12 ignition coil primary/secondary circuit fault — V12 engines only (BMW N73/N74, Mercedes M275/M279, Ferrari V12, Lamborghini Aventador, Aston Martin V12, Jaguar V12, Audi W12). Cylinder 12 location: on BMW N74 V12 it's the very rear cylinder of bank 2 (firewall side), on Mercedes M275/M279 V12 it's bank 2 rear, on Ferrari F140 V12 it's bank 2 rearmost (toward the gearbox in the mid-engine 812 / front-engine F12), on Lamborghini Aventador L539 V12 it's bank 2 rear. This is the most thermally abused cylinder on any production V12 — rear of the rear bank, packed under engine covers, sitting on top of exhaust collectors. Cheapest-first diagnostic: swap the cylinder 12 coil with a known-good same-part-number coil from a front-bank position, clear codes, drive cycle. Code follows = coil replacement ($80-$400 OE). Code stays = trigger wire ECM-to-coil under 0.5 ohms, B+ feed 12.0-12.6V static / 13.5-14.5V running, ground drop under 0.1V, scope the trigger pulse. On any V12, P0362 specifically on cylinder 12 with the rest of the engine running clean usually still indicates a full-set replacement is appropriate above 60K miles — the rest of bank 2 is days behind. Do NOT use aftermarket coils on these engines under any circumstances; cascading misfires and ECM coil-driver damage from impedance mismatch are documented failure modes.

Vehicle-specific patterns: 2009-2019 BMW 760Li / Rolls-Royce Ghost-Phantom N74 6.0L TT V12 cylinder 12 P0362 from Bosch coil failure — full-set replacement is the only correct answer on a high-mileage N74; access requires removing engine covers and partial intake. 2006-2013 Mercedes S600/CL600/SL600/Maybach M275 5.5L V12 BiTurbo cylinder 12 P0362 — heat-soaked rear-rear position, coil-on-plug boots also crack from heat; full-set + boots is the high-mileage repair. 2012-2021 Lamborghini Aventador L539 cylinder 12 P0362 — rearmost cylinder against the gearbox, rear engine bay access ($1,500-$3,000 labor). 2002-2010 Aston Martin V12 (DB9/Vanquish/DBS) 5.9L cylinder 12 P0362 from aged coils — Aston V12 is essentially two Ford Duratec V6s siamesed, and the rear-bank rear position is where heat-soak accumulates. 2002-2010 BMW 760i N73 6.0L NA V12 cylinder 12 P0362 — predecessor to N74, same batch-failure coil pattern. 2017-2024 Ferrari 812 Superfast F140 V12 cylinder 12 P0362 — Ferrari authorized service, Magneti Marelli OE coils, full powertrain inspection at failure point. Estimated repair: $250 (single coil on M275) to $12,000+ (Aventador or Ferrari V12 full coil set with rear engine access and OE parts).