Needing to add oil between regular service intervals.
The class action settlement covers US-specification 2009–2014 models with the N63 twin-turbo V8 engine, including: bmw valve stem seal recall
Oil seeping into the combustion chamber. Lawsuit Settlement Details & Coverage Needing to add oil between regular service intervals
Up to three free oil consumption tests/inspections. and fail prematurely.
Repairs related to oil consumption—including valve stem seal replacement—were covered for 10 years or 120,000 miles from the in-service date.
The N63 engine's "hot-vee" design, which places the turbochargers inside the cylinder bank, creates immense heat-soak. This excessive heat causes the rubber valve stem seals to harden, crack, and fail prematurely.