B58 Engine for Sale: The Ultimate Guide to Buying the BMW B58 Engine

If you’re a performance enthusiast or a BMW tuner, chances are you’ve come across the legendary B58 engine. Known for its robust design, powerful performance, and impressive tuning capabilities, the B58 engine is quickly becoming a favorite among engine swappers and project car builders. In this guide, we’ll explore everything you need to know before buying a B58 engine for sale—including specifications, models, reliability, swap options, and where to buy.

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What is the B58 Engine?

The BMW B58 engine is a turbocharged inline-6 engine introduced in 2015, part of BMW’s modular engine family. It succeeded the N55 engine and brought several performance and reliability improvements.

B58 Engine Overview:

• Configuration: Inline 6-cylinder

• Displacement: 3.0 liters (2998cc)

• Turbocharger: Twin-scroll turbocharger

• Fuel System: Direct injection

• Power Output: 322–382 horsepower (varies by model and year)

• Torque: 332–369 lb-ft (450–500 Nm)

• Transmission Compatibility: 6-speed manual, 8-speed ZF automatic

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Which Cars Use the B58 Engine?

If you’re considering a B58 engine for sale, it’s useful to know which vehicles originally came equipped with this engine. The B58 powers a range of BMW and Toyota models:

BMW Models:

• BMW 340i / 440i (F30/F32)

• BMW M240i (F22)

• BMW 540i / 640i / 740i

• BMW Z4 M40i

• BMW X3 M40i / X4 M40i / X5 40i

Toyota Models:

• Toyota GR Supra (2020–Present)

These vehicles are often parted out, making their B58 engines available on the used market or through performance tuners.

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Why Buy a B58 Engine?

The B58 engine is highly sought after for several reasons:

1. Performance and Tuning Potential

The B58 is incredibly capable. Tuners can push stock internals beyond 500 horsepower with bolt-ons and ECU tuning. Some builds even exceed 700 hp with upgraded turbos.

2. Improved Reliability Over N55

The B58 addressed many reliability concerns from the N55, including:

• Integrated water-to-air intercooler

• Closed-deck engine block

• Forged crankshaft and rods

• Better heat management

3. Smooth Power Delivery

Thanks to the inline-6 configuration and advanced turbocharging, the B58 offers a linear, responsive power band perfect for both daily driving and track performance.

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Different Versions of the B58 Engine

The B58 has evolved over time into multiple variants:

B58B30M0 (Gen 1)

• Found in early models like the BMW 340i and M240i

• ~322–335 hp

• Great for budget swaps and entry-level performance

B58B30O1 (Gen 2)

• Found in G20 340i, Z4 M40i, and GR Supra

• Higher compression, larger turbo

• Up to 382 hp stock

• Better fueling and cooling systems

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B58 Engine Swap Guide

Doing a B58 swap can be a game-changer for many project cars. Whether you’re dropping one into a BMW E46, E30, or even a Toyota chassis, the B58 offers modern power and drivability.

Considerations Before a Swap:

• ECU & Wiring Harness: Use a standalone ECU or retain the original BMW DME with coding

• Transmission Compatibility: Many pair the B58 with the ZF 8HP transmission or Tremec manual gearbox

• Motor Mounts: Custom fabrication or swap kits are often required

• Cooling: Ensure sufficient intercooling and radiator capacity

• Fuel Delivery: Return-style fuel systems with upgraded injectors may be necessary

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Where to Find a B58 Engine for Sale

Looking for a used B58 engine for sale or a complete swap kit? Here are the best places to search:

1. Online Marketplaces

• eBay Motors – Thousands of listings for B58 engines and swap kits

• Car-Part.com – Access to salvage yards across the U.S. and Canada

• Facebook Marketplace – Great for local finds and enthusiast listings

• Craigslist – Occasionally has deals from private sellers or shops

2. BMW Dismantlers and Salvage Yards

Many companies specialize in parting out BMWs and high-performance models:

• BimmerWorld

• LKQ Pick Your Part

• Bavarian Auto Recycling

• R3Vlimited forums (for older BMWs)

3. Performance Shops and Tuners

Some shops sell crate B58 engines or fully prepped swap kits:

• Papadakis Racing

• Drift HQ

• Future Classic Tuning

• SupraStore.com

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What’s the Cost of a B58 Engine?

Prices vary depending on the version, mileage, and whether it’s a long block or full engine with accessories:

Pro Tips:

• Always verify compression and leak-down test results if buying used

• Ensure the engine includes wiring harness, sensors, turbo, and manifolds

• Watch out for flood-damaged or incomplete engines at a discount

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B58 Engine Tuning and Upgrades

If you’re buying a B58 engine for sale, you likely have performance in mind. Here are common upgrades:

ECU Tunes

• Bootmod3, MHD, and Ecutek offer Stage 1–3 tunes

• Can increase horsepower by 80–150 hp with no internal mods

Turbo Upgrades

• Pure800, KRAS55, and Doc Race offer hybrid turbos for up to 700+ hp

Downpipes and Exhaust

• Catless downpipes increase power and turbo spool

• Full exhaust systems can free up 20–40 hp

Cooling Mods

• Upgraded charge pipes, heat exchangers, and intercoolers

• Important for track or high-boost applications

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Common B58 Engine Problems to Watch For

While reliable, the B58 isn’t bulletproof. Here are some known issues:

Coolant Leaks

• From plastic water pump housings or radiator fittings

High Pressure Fuel Pump (HPFP) Failure

• More common in tuned or high-mileage engines

Carbon Build-Up

• Direct injection engines suffer from intake valve gunk over time

• Walnut blasting or port injection can help

Boost Leaks

• From charge pipes or diverter valves, especially after modifications

Oil Consumption

• Can occur with aggressive driving or extended oil intervals