Overview
The story
The B58 replaced the N55 and began production in 2015, with a closed-deck aluminum block and a single twin-scroll turbo. A published reference lists it in the F30 340i from 2015, the G20 M340i from 2019 and the Toyota Supra from 2019. A published reference
Specs
Versions
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3.0L turbo B58 A published reference
In F30 BMW 3 Series, 2016–2018; G20 BMW 3 Series, 2020–2026; F32 BMW 4 Series, 2017–2020; G22 BMW 4 Series, 2021–2026; G30 BMW 5 Series, 2017–2023; G60 BMW 5 Series, 2024–2026; G60 BMW 5 Series, 2025–2026; G01 BMW X3, 2018–2019; G01 BMW X3, 2020–2024; G45 BMW X3, 2025–2026; G05 BMW X5, 2019–2020; G05 BMW X5, 2021–2023; G05 BMW X5, 2024–2026; G29 BMW Z4, 2020–2026; 5th gen Toyota Supra, 2020–2026
Figures
- Displacement: 3.0L (2,998 cc) A published reference
- Bore × stroke: 82 × 94.6 mm A published reference
- Block: Aluminum, closed deck A published reference
Watch out
Faults owners and the press report, and how to spot each one.
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Coolant loss Every version
One source so far
Check: Look for blue or green residue at the water pump's weep hole and ask how often it needs topping up.
BMW Tuning says topping up every 10,000 to 15,000 miles is probably minor, and that water pumps can fail early but typically last to about 75,000 to 100,000 miles. A seller's guide (unofficial)
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Leaking valve cover gasket and PCV Every version
One source so far
Check: Look for oil on the spark plugs and smoke from around the valve cover.
BMW Tuning says leaks commonly develop around 70,000 to 100,000 miles, and that the PCV diaphragm built into the cover can crack. A seller's guide (unofficial)
Owning
Maintenance
No service schedule is added yet.
What owners and buyers say
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Sought after
One of BMW's most reliable engines Every version
One source so far
BMW Tuning says the B58 is one of the most reliable engines BMW has ever produced, and that its problems are far less common than on BMW's earlier turbo sixes. A seller's guide (unofficial)