BMW B-series modular platform B58 — 3L I6 24V DOHC Twin-scroll Turbo Valvetronic VANOS Engine
3L I6 24V DOHC Twin-scroll Turbo Valvetronic VANOS · 258-387 hp · 400-500 Nm
Engine overview
Manufacturer
BMW B-series modular platform
Displacement
3 L
Configuration
I6 24V DOHC Twin-scroll Turbo Valvetronic VANOS
Power
258-387 hp
Torque
400-500 Nm
Production years
2015-present
Fuel type
Petrol
Vehicles with this engine
Known failures & weak points
The high-pressure fuel pump can fail from around 60,000-120,000 km, sometimes linked to inadequate cam-lobe lubrication on early (pre-2018) builds. Symptoms include lean misfires under load, hard hot-starts, and fuel-trim corrections beyond normal range; inspect both the pump and cam lobe when replacing it.
Valvetronic eccentric shaft sensor failure at 80,000-150,000 km: Sensor degrades due to oil contamination ingress, triggers limp mode with fault 2A82/2A87, rough idle, loss of Valvetronic function. Engine reverts to throttle-body control only. Fix: replace sensor (13627588189) and clean eccentric shaft housing; verify no shaft wear. Common on early G-chassis builds.
The OEM plastic charge pipe between the turbo and intercooler cracks at the elbow under sustained boost and heat cycling, causing a boost leak, a P0299 underboost code, and flat power delivery above roughly 3,500 rpm. This is one of the most common B58 complaints; an updated aluminum charge pipe resolves it.
The crankcase-ventilation (CCV) membrane can tear, causing excessive crankcase pressure, oil consumption, blue smoke on overrun, oil in the intake tract, and lean-mixture codes. Clean the intake manifold and throttle body of oil deposits when replacing the CCV unit, since neglect can lead to turbo seal failure.
Turbocharger wastegate rattle at 60,000-100,000 km: Wastegate actuator arm develops play causing audible metallic rattle at idle and light throttle, especially cold. DME may log boost control faults. Root cause: actuator rod end wear.
The electric water pump's impeller can debond from its shaft — an issue inherited from the N55 generation — causing sudden coolant flow loss and an overheating warning, often without an obvious external leak beforehand. Use an OEM-spec pump rather than a non-OEM unit, since flow rate is critical for Valvetronic cooling.
Injector carbon deposit buildup on intake valves at 60,000-80,000 km: Direct injection only (no port injection on base B58) causes heavy carbon accumulation on intake valves, resulting in rough idle, misfires at cold start, reduced power. recommend every 60,000 km as preventive maintenance. Note: B58TU (2019+ update) adds port injection to mitigate this.
Oil sludge from extended drain intervals can block the VANOS solenoid filter screens, causing slow cam-phaser response, cold-start cam-timing faults, rough idle, and timing-chain rattle. Clean or replace the solenoids and inspect the chain tensioner; strict oil-change intervals help prevent recurrence.
Common torque specifications
| Head Bolts | Stage 1: 30 Nm; Stage 2: +90°; Stage 3: +90°; Stage 4: +90° — TTY bolts, single-use mandatory, replace on every removal (OEM p/n 11127560530) unconfirmed |
|---|---|
| Crank Pulley Bolt | 410 Nm + 45° — TTY, single-use; use flywheel locking tool 11 9 280 to prevent rotation unconfirmed |
| Main Bearing Cap Bolts | Outer bolts: 15 Nm + 70°; Inner cross-bolts: 30 Nm + 90° — TTY, replace each removal unconfirmed |
| Camshaft Bearing Cap Bolts | 10 Nm — non-TTY, reusable; tighten in sequence from center outward unconfirmed |
| Turbocharger To Exhaust Manifold Nuts | 25 Nm — use new copper nuts each time; anti-seize on studs unconfirmed |
Figures marked unconfirmed could not be cross-checked against a workshop source. Verify against the vehicle’s own documentation before tightening.
Service intervals
| Timing Chain | Lifetime design — no scheduled replacement; inspect at 150,000+ km if cold-start rattle present; chain kit replacement ~€1,200 indie if worn |
|---|---|
| Oil Change Km | 10000 |
| Oil Spec | 5W-30 BMW Longlife-04 (LL-04) — ACEA C3; approved brands: Castrol Edge 5W-30 LL, Mobil 1 ESP 5W-30. Do NOT use LL-01 or non-BMW-approved oils. |
| Oil Capacity L | 6.5 |
| Coolant Spec | BMW Coolant / Antifreeze (83192211191) — blue, silicate-free OAT; mix 50:50 with distilled water; do NOT mix with green silicate coolant |
Pro tips from the field
Always code/program the replacement electric water pump via ISTA after fitting — the DME runs a pump calibration routine that sets flow parameters; skipping this step causes premature pump failure warnings and incorrect thermal management behavior. Non-ISTA shops frequently miss this step.
On B58TU (2019+ with port injection), the low-pressure fuel system runs a separate LPFP in-tank; if you see lean codes alongside HPFP faults, always pressure-test the LP circuit first (spec: 5.0-6.5 bar at idle) before condemning the HPFP — a weak LPFP starves the HPFP and causes identical symptoms at a fraction of the repair cost.
Wastegate actuator replacement requires recalibration using BMW ISTA 'Wastegate Teach-In' function after fitting — without this, boost control will be erratic and the DME will log false overboost/underboost faults. The calibration sets the closed-position reference point; no generic scan tool can perform this procedure.
When diagnosing VANOS faults, always perform an oil pressure test at the solenoid feed galleries before replacing cam phasers — low oil pressure from a worn pump or blocked pickup will mimic phaser failure exactly. B58 minimum oil pressure spec is 1.2 bar at idle (warm); below this, no solenoid or phaser replacement will resolve the fault.
The B58 uses a map-controlled thermostat that opens at variable temperatures (85-105°C depending on load); never condemn the thermostat based on coolant temperature alone without reading the DME's target vs. actual thermostat position via ISTA live data. A 'stuck open' diagnosis from a generic reader will frequently be a false positive on this engine.
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TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 2 Oct 2026.