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BMW B58B30M2 3.0L Inline‑6 TwinPower Turbo Petrol Engine

High‑Performance Evolution of BMW’s Modular Straight‑Six

The BMW B58B30M2 is part of BMW’s modern B-series modular engine family, succeeding the N55 generation. Introduced in 2022 as the latest “TU2” version of the award-winning B58, it was originally launched in 2015 and refined with enhanced cooling, twin‑fuel injection, electric VANOS and mild‑hybrid support. Crafted with a closed‑deck aluminium block and aluminium head, it delivers peak power in the 375-393 hp range and torque up to 580 Nm (combined with 48 V hybrid boost).

Compared to its predecessor (BMW N55), the B58B30M2 incorporates significantly upgraded injection and cooling hardware, a single TwinScroll turbocharger, integrated water‑to‑air intercooler and BMW Valvetronic with Double VANOS. Shared with BMW’s B37/B48 engines for platform synergy, the B58's layout offers excellent thermal efficiency, responsiveness and long‑term strength. The refinement, smoothness and tuning resilience have made it a firm favourite in the UK market for reconditioned and performance replacements.

Its balance of dynamic output, fuel economy, and mechanical durability makes this engine particularly popular in performance saloons, SUVs and hybrid applications across Europe. As a 3.0L inline‑six petrol engine, it supports mild‑hybrid systems while maintaining smooth torque delivery from low RPM, ideal for manual or automatic variants.

Common applications include the BMW 340i engine, BMW X3 M50 engine, BMW M240i engine, and the Toyota GR Supra (which adopts the B58 for high-performance integration). These versatile fits span performance, luxury and hybrid‑enhanced configurations across the BMW portfolio.

Technical Specifications & Configuration

Engine Code
B58B30M2
Engine Size
2998cc / 3.0 Litres
Cylinder Configuration
Inline 6 cylinder (I6)
Aspiration
Single TwinScroll Turbocharged
Fuel Type
Petrol (with 48V mild hybrid)
Injection System
Direct & Port Fuel Injection (Dual-Injection)
Valvetrain
DOHC - Valvetronic with Double VANOS
Compression Ratio
11.0:1
Cooling System
Water cooled with integrated intercooler
Block Material
Aluminium Alloy (Closed-deck)
Head Material
Aluminium Alloy
Emission Standard
Euro 6d (with GPF, EGR & 48V MHEV compliance)
Power Output Range
374 - 393 PS (varies by application)
Torque Output
500 - 580 Nm (with hybrid boost)
Turbo Configuration
TwinScroll Single Turbo (integrated manifold)
Fuel Economy (Est.)
35-42 MPG combined (varies by model)

Common Configurations

  • BMW M340i xDrive: 374 PS, ZF 8-speed Auto, AWD
  • Toyota GR Supra 3.0: 382 hp, RWD, sport-tuned exhaust
  • BMW Z4 M40i: 340-387 PS, 8-speed Steptronic
  • BMW X3 M40i: 360 PS, xDrive AWD, Mild Hybrid
  • BMW 540i xDrive: 333 PS, ZF 8-speed, AWD sedan

Noteworthy Engineering Highlights

  • 🧊Integrated water-to-air intercooler: Improves turbocharger efficiency
  • ⚙️Closed-deck aluminium block: Ensures rigidity under boost
  • 💡Variable valve lift (Valvetronic): Enhances fuel efficiency and throttle response
  • 🔥Direct injection with 350 bar pressure: Delivers precise fuel atomisation
  • 🔄Balance shaft and forged crankshaft: Increases smoothness and durability

Engine Naming Reference

B58, B58B30M2, BMW B58 Gen 2, TwinPower Turbo I6, 3.0L turbo petrol, GR Supra engine, Z4 M40i engine, B58TU, B58M2, 374PS B58, B58B30O1, M340i engine, Toyota BMW 3.0 turbo, BMW inline-6 petrol

Types of BMW B58B30M2 Replacement Engines Available

BMW B58B30M2 Rebuilt Engines

High-performance rebuilds with OEM-grade pistons, gaskets & timing chains.

BMW B58B30M2 Remanufactured Engines

Every unit fully stripped and rebuilt to match factory tolerances.

BMW B58B30M2 Reconditioned Engines

Carefully inspected, cleaned, and restored by seasoned petrol specialists.

BMW B58B30M2 Replacement Engines

Direct-fit petrol engines ideal for quick swaps and no-hassle installations.

BMW B58B30M2 Refurbished Engines

Budget-friendly, tested units with clean internals and compression-verified heads.

BMW B58B30M2 Used Engines

Hand-selected from breakers and verified by our expert mechanics.

Compatible Models with BMW B58B30M2 Engine

BMW & Toyota Performance Models

BMW M340i with B58B30M2 3.0L twin‑turbo inline‑6 engine

BMW M340i
BMW Z4 M40i with B58B30M2 inline‑6 petrol engine

BMW Z4 M40i
Toyota GR Supra with BMW B58B30M2 3.0L petrol turbo engine

Toyota GR Supra

BMW B58B30M2 Engine Applications


BMW Sedan Applications

BMW Logo
BMW M340I 374 HP
2020-2023
B58B30M2 petrol, ZF 8‑speed auto, mHEV boost
BMW 540I XDRIVE 333 HP
2020-Present
B58, AWD 48V Mild‑Hybrid, luxury sedan

BMW SUV & Roadster Applications

BMW Logo
BMW X3 M40I 360 HP
2023-Present
B58B30M2 petrol, xDrive AWD, sport SUV
BMW Z4 M40I 387 HP
2020-Present
Roadster B58B30M2, 8‑speed Steptronic

⚠️ Note: If you're unsure whether your vehicle uses the B58B30M2 engine, enter your registration number above or contact support for a free compatibility check.

Common BMW B58B30M2 Engine Problems & Solutions


Pricing, Warranty & Availability

Most Popular

Rebuilt BMW B58B30M2 Engine

From
£6,100
(Supply Only)
  • ✔ Fully Disassembled & Rebuilt
  • ✔ OEM-Grade Replaced Parts
  • ✔ Like-New Condition
  • ✔ 12-24 Month Warranty

Reconditioned BMW B58B30M2 Engine

From
£5,200
(Supply Only)
  • ✔ Professionally Reconditioned
  • ✔ Thoroughly Inspected & Tested
  • ✔ Restored to OEM Standard
  • ✔ 12 Month Warranty
Cheapest Option

Used BMW B58B30M2 Engine

From
£3,300
(Supply Only)
  • ✔ Basic Inspection
  • ✔ Compression Tested
  • ✔ Known Service History
  • ✔ 30 Days to 3 Month Warranty

Refurbished BMW B58B30M2 Engine

From
£4,500
(Supply Only)
  • ✔ Partial Overhaul
  • ✔ Key Component Replacement
  • ✔ Cost-effective Option
  • ✔ 3 to 6 Month Warranty

📦 Stock Availability & Delivery Time

  • 🔄 High availability across UK suppliers
  • 🚚 Next-day delivery on in-stock units (supply only)
  • 🛠️ 7-10 day turnaround for rebuilt units
  • 📦 Free UK mainland delivery (select suppliers)

⭐ What You Get With Every BMW B58B30M2 Engine

  • 🧰 OEM-quality rebuilds using BMW-approved parts
  • 🔎 Full inspection reports w/ compression & leak-down tests
  • 📋 Engine serial & block codes verified
  • 💬 UK-based support before & after sale
  • 🔄 Exchange options for faulty units
  • 🧾 Simple returns & warranty claims

BMW B58B30M2 Engine Reconditioning Process


STEP 1 1 Day

Initial Inspection & Diagnostic Reporting

  • Visual & Dimensional Checks: Deck flatness, bore wear, and head warpage.
  • Oil & Coolant Analysis: Detect fuel dilution, glycol traces, or contamination.
  • Compression Testing: Verify ring and valve sealing before teardown.
STEP 2 1-2 Days

Complete Strip Down & Component Cleaning

  • Media Blast Cleaning: Remove carbon & sludge from internals.
  • Chemical Degreasing: Clean oil pump, HPFP, and turbo cores.
  • Part Identification: Catalog rods, pistons, and cams for traceability.
STEP 3 2-3 Days

Non-Destructive Testing & Machining

  • Crack Testing: Magnaflux and dye penetrant for structural faults.
  • Boring & Honing: Re-bore cylinders and hone for correct finish.
  • Crank Grinding: Undersize grind and dynamic balance.
  • Surface Milling: Flatness to <0.03mm deviation.
STEP 4 1 Day

Component Replacement with OEM Parts

  • Pistons & Rings: Forged internals matched to rebored block.
  • Timing Kit: New chain, guides, tensioner, sprockets.
  • Seals & Gaskets: All major gaskets and seals replaced.
  • Water & Oil Pump: New OEM pumps with updated specs.
STEP 5 1 Day

Assembly & Torque Angle Verification

  • Sequential Torque: Head & main bolts torqued to spec.
  • Phaser Setup: Cam phasers installed and OCVs verified.
  • Injector Setup: Calibrated with precision flow test bench.
STEP 6 1 Day

Hot Bench Dyno & Road Simulation

  • Cold Start Test: Oil pressure and tensioner function verified.
  • Load Simulation: Urban/motorway load profiles checked for leaks and stability.
  • Compression & Emissions: Ring seal and smoke tested before dispatch.
BMW replacement engine - Engine Finders

Why Choose Engine Finders for BMW B58B30M2 Petrol Engine?

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  • ✔ BMW B58B30M2 Engines Specialists

    From the BMW 3 Series to the BMW X5, we offer all variants (150PS / 190PS / 265PS) .

  • ✔ Performance Matched with Experience

    Our remanufactured and reconditioned engines often meet or exceed OEM specs - ready for serious off-road and on-road action.

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Frequently Asked Questions - BMW B58B30M2 Engine

How much does a BMW B58B30M2 engine cost in the UK?

A used or reconditioned BMW B58B30M2 engine typically costs between £4,000 and £6,500, depending on mileage, condition, and whether it's supplied with ancillaries. Rebuilt long blocks with warranty from trusted UK suppliers tend to start from £5,000 with 12-month coverage.

Is the BMW B58B30M2 engine reliable long term?

Yes, the BMW B58B30M2 is considered one of BMW’s most reliable modern engines. Many units exceed 150,000-200,000 miles with proper maintenance. Regular oil changes (every 7,000-10,000 miles), coolant flushes, and attention to the PCV system are key to long-term durability.

What cars use the BMW B58B30M2 engine?

The B58B30M2 powers several UK-market BMW models including the G20 M340i, G22 M440i, X3 M40i (G01), and the Toyota Supra GR (post-2020). It’s the second-gen B58 evolution featuring revised turbo geometry, improved thermal management, and higher injection pressure.

What are the common issues with the B58B30M2 engine?

While generally robust, the B58B30M2 can suffer from coolant leaks (water pump housing), oil filter housing gasket failures, and PCV valve issues. Carbon buildup on intake valves is also common around 60,000+ miles, especially in short-trip urban driving.

How often should you service the B58B30M2?

BMW recommends service every 18,000 miles, but most UK specialists advise oil changes every 7,000-10,000 miles using 0W-30 LL-01 spec oil. Spark plugs should be replaced around 40,000 miles, and coolant every 4-5 years for optimal longevity.

Is the B58B30M2 engine good for tuning?

Absolutely. The B58B30M2 responds well to tuning, with Stage 1 maps producing 400-440 hp on stock hardware. With upgraded downpipes, intake, and intercooler, Stage 2 tunes can push over 500 hp. However, tuning may void warranties and affect MOT emissions compliance.

Does the B58B30M2 engine meet UK emissions standards?

Yes, the B58B30M2 meets Euro 6d-TEMP and later Euro 6d standards, featuring a gasoline particulate filter (GPF) and advanced NOx control. It is ULEZ-compliant and passes UK MOT emission checks when unmodified. Removal of the GPF for tuning may cause MOT failure.

Can I swap a B58B30M2 engine into an older BMW chassis?

While technically possible, a B58B30M2 swap requires major custom work including ECU reprogramming, custom mounts, CAN integration, and emissions compliance. It's more viable in F- or G-series platforms. Swapping into E-series or earlier is considered a high-cost, enthusiast-only project.

What oil should I use for a B58B30M2 engine?

Use high-quality synthetic oil that meets BMW Longlife-01 or LL-17 FE+ specifications. In the UK, Shell Helix Ultra 0W-30 or Castrol EDGE 0W-30 are commonly recommended for optimal protection and cold-start performance. Always verify oil spec with your VIN or BMW TIS data.