BMW 340i (F30) engine: which one, problems and replacement

The BMW 340i in the sixth 3 Series generation (F30, built 2011–2019) was built with one engine, the B58B30: a 3.0 L petrol inline-6 with 340 hp.

This guide tells you which engine your 340i has, what goes wrong with it, what a replacement costs from our stock and what else to plan for when you fit one.

• Generation: sixth 3 Series, 2011–2019
• Body styles: F30 (saloon)
• Engines: B58B30
• Output: 340 hp
• Replacement engines in stock: 228 from 4.214,00 €

Which engine is in your 340i?

B58B30 in the 340i

The B58B30 was used in the F30 340i, built 2015–2026. It is a 3.0 L turbocharged petrol inline-6 with 340 hp and 500 Nm.

Reading the code: B marks a B-series code, BMW's modular engine family introduced from 2013 with 500 cc per cylinder; 58 is the family number; B stands for petrol, longitudinal installation for rear-drive and xDrive cars; 30 is the capacity in decilitres, so 3.0 litres.

340i engines by model year

The 340i kept the same engine for the whole F30 run, which makes ordering simple: any unit with the same code fits, subject to the gearbox, drive type and sump.

Other cars with the same engine as the 340i

A replacement engine does not have to come from another 340i. These models left the factory with the same engine code, so a unit from any of them is a candidate donor once the sump, mounts and ancillaries are matched to your car.

B58B30: BMW G20 M340i, BMW G30 540i, BMW G05 X5 40i, BMW G29 Z4 M40i, Supra 3.0.

How to confirm your engine code

The 340i only used the B58B30, but the exact version can still change with the build date, gearbox and market. Send us the last seven characters of the VIN and we read the engine code from BMW's records, or look for the code stamped on the block. How to find your BMW engine code.

Known 340i engine problems

The B58B30 in the 340i shares the known weak points of the B58 family. Full B58 guide.

Coolant leaks. Expansion tanks and coolant lines leak.

Oil filter housing. The plastic oil filter housing can leak.

PCV valve. The PCV in the valve cover can fail.

Symptoms to watch for on the 340i

Rattle for a few seconds after a cold start. The classic sign of a weak timing chain tensioner or stretched chain. It must be checked quickly: a chain that jumps a tooth can bend valves.

Rattle or whine from the gearbox end. On engines with the timing chain at the rear, a rattle or whine from the back of the engine is the warning sign of chain stretch or guide wear.

Whistle, loss of boost or limp mode. A split charge pipe, a sticking wastegate or worn turbo bearings. Check the pipes first, then the turbo shaft for play.

Poor low-down torque and uneven idle. VANOS seals or solenoids. The engine may run well at high revs but feel flat and lumpy at low speed.

Limp mode with a Valvetronic fault. The Valvetronic motor, its eccentric shaft sensor or the wiring. The engine runs on a reduced throttle until it is repaired.

Long cranking before the engine starts. On direct-injection engines, a weak high-pressure fuel pump or leaking injector lets pressure drop when the engine is off.

Looking after the 340i engine

• Oil: 0W-30 BMW Longlife-01 or 17 FE+, about 6.5 litres.
• Service interval: Oil every 15,000 km or yearly.
• Timing drive: Timing chain at the rear (gearbox end).
• Workshop notes: Check the version (B58B30M0, M1 or TU) before ordering.

Buying a used engine for the 340i: checklist

1. List of what is fitted. Engines are sold with different ancillaries: some have the turbo, injectors, manifolds, alternator and starter, others are long blocks. Agree the list in writing so you know which parts must come from your old engine.
2. Photographs from every side. Good suppliers photograph the actual engine you will receive. Look for the block stamp, the sump, the timing cover and any broken brackets or connectors in the pictures.
3. Compression or leak-down figures. Even compression across all cylinders tells you more than mileage. Ask for the figures, not just a pass or fail, and compare the highest and lowest readings: a spread above 10 to 15 percent deserves a question.
4. Confirm the exact engine code. Read the code stamped on the block and compare it with the code for your car. Send us the last seven characters of the VIN and we confirm the match before anything is paid.
5. Ask how the donor car was damaged. Most good used engines come from cars with body damage. A front-end impact can crack sensors, the timing cover or the sump; a rear or side impact usually leaves the engine untouched. The yard records the damage on each unit.
6. Turbocharger shaft play and oil. Rotate the compressor wheel by hand. A small amount of side play is normal; in-and-out play or wheel contact with the housing is not. Oil pooled in the intake or intercooler pipes points to worn seals.
7. Timing chain noise. Listen for a rattle at the front of the engine for the first seconds after a cold start. On an engine that cannot be run, look at the chain guides through the oil filler or with the valve cover off.
8. Gearbox-end timing chain. On this engine the timing chain sits at the gearbox end, so replacing it normally means removing the engine. If the chain has not been replaced, the time to do it is before the engine goes into your car.
9. VANOS operation. Rough idle, a rattle from the front of the head and a loss of torque at low revs point to VANOS seals or solenoids. These are serviceable parts and are easier to renew with the engine out.
10. Double VANOS units and solenoids. Ask for the adaptation values or fault history if the engine was running. Solenoids are inexpensive and are often replaced as a matter of course on a used engine.
11. Valvetronic motor and eccentric shaft sensor. The Valvetronic motor and its sensor cause limp-mode faults when they fail. Inspect the connector and the seal around the motor for oil.
12. Injectors and high-pressure fuel pump. Direct-injection engines rely on high-pressure pumps and precise injectors. Ask whether the injectors are original or updated and whether there were fuel pressure faults.

BMW 340i replacement engine cost

We currently hold 228 340i engine engines. The cheapest is 4.214,00 €, the most expensive 7.572,00 €, and half of them cost less than 5.358,00 €.

Prices depend on the exact version, the donor's mileage, how complete the engine is and the demand for that code. Higher-output versions, low mileage and dressed engines with turbo, injectors and ancillaries cost more; long blocks and higher mileage cost less.

340i engine prices by model year

Engines from 2015–2019 have a median of 5.328,00 €, while units from 2020–2024 sit at 5.237,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

340i engine prices by mileage

Mileage matters less than history on a well-maintained BMW engine, but it is a useful guide. A low-mileage unit from a younger car gives you more life for a modest premium.

111 of these come from F30 donor cars, priced from 4.259,00 € to 7.544,00 €. An engine from the same body is the most direct swap because the sump, mounts and ancillaries already match.

On top of the engine, budget for the workshop's labour and the parts that are best replaced while the engine is out: engine mounts, the rear main seal, cooling parts, a clutch or converter seal, fluids and filters.

Replacement engines in stock for the 340i

These 340i units are in our Hamburg yard right now. Each listing shows real photographs of the engine you receive, its mileage and what is fitted.

BMW F30 340i B58B30 Engine 2020, 180,500 km4.654,00 €BMW F30 340i B58B30 Engine 2015, 148,500 km4.985,00 €BMW F30 340i B58B30 Engine 2017, 61,600 km5.982,00 €BMW F30 340i B58B30 Engine 2017, 47,500 km4.842,00 €BMW F30 340i B58B30 Engine 2019, 193,000 km5.093,00 €BMW F30 340i B58B30 Engine 2017, 138,100 km5.105,00 €BMW F30 340i B58B30 Engine 2020, 149,200 km5.103,00 €BMW F30 340i B58B30 Engine 2016, 75,200 km4.625,00 €BMW F30 340i B58B30 Engine 2018, 145,400 km5.070,00 €BMW F30 340i B58B30 Engine 2015, 131,800 km6.492,00 €BMW F30 340i B58B30 Engine 2016, 170,000 km5.210,00 €BMW F30 340i B58B30 Engine 2016, 59,600 km6.388,00 €

BMW F30 340i B58B30 Engine 2020, 180,500 km — 4.654,00 €, reduced from 5.300,00 €. It comes from a 2020 donor car with 180,500 km, and 25 units are available. We can confirm fitment against your VIN the same day.

BMW F30 340i B58B30 Engine 2015, 148,500 km — 4.985,00 €, reduced from 5.700,00 €. It comes from a 2015 donor car with 148,500 km, and 24 units are available. We can confirm fitment against your VIN the same day.

BMW F30 340i B58B30 Engine 2017, 61,600 km — 5.982,00 €, reduced from 7.300,00 €. It comes from a 2017 donor car with 61,600 km, and 16 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F30 340i B58B30 Engine 2017, 47,500 km — 4.842,00 €, reduced from 5.800,00 €. It comes from a 2017 donor car with 47,500 km, and 6 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F30 340i B58B30 Engine 2019, 193,000 km — 5.093,00 €, reduced from 6.000,00 €. It comes from a 2019 donor car with 193,000 km, and 5 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F30 340i B58B30 Engine 2017, 138,100 km — 5.105,00 €, reduced from 6.250,00 €. It comes from a 2017 donor car with 138,100 km, and 26 units are available. The listing shows every side of the engine and the fitted parts.

BMW F30 340i B58B30 Engine 2020, 149,200 km — 5.103,00 €, reduced from 5.850,00 €. It comes from a 2020 donor car with 149,200 km, and 6 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F30 340i B58B30 Engine 2016, 75,200 km — 4.625,00 €, reduced from 5.200,00 €. It comes from a 2016 donor car with 75,200 km, and 25 units are available. The listing shows every side of the engine and the fitted parts.

BMW F30 340i B58B30 Engine 2018, 145,400 km — 5.070,00 €, reduced from 6.200,00 €. It comes from a 2018 donor car with 145,400 km, and 22 units are available. The listing shows every side of the engine and the fitted parts.

BMW F30 340i B58B30 Engine 2015, 131,800 km — 6.492,00 €, reduced from 7.250,00 €. It comes from a 2015 donor car with 131,800 km, and 16 units are available. We can confirm fitment against your VIN the same day.

BMW F30 340i B58B30 Engine 2016, 170,000 km — 5.210,00 €, reduced from 6.000,00 €. It comes from a 2016 donor car with 170,000 km, and 20 units are available. We can confirm fitment against your VIN the same day.

BMW F30 340i B58B30 Engine 2016, 59,600 km — 6.388,00 €, reduced from 7.150,00 €. It comes from a 2016 donor car with 59,600 km, and 26 units are available. Ask the desk for compression figures or extra photographs before you order.

Will it fit my 340i?

Fitting a replacement engine in the 340i

1. Inspect or replace the timing chain parts. Look at the guides and tensioner. On high-mileage engines, replacing them now costs far less than doing it later.
2. Replace the rear timing chain if in doubt. On engines with the chain at the gearbox end, chain work needs the engine out. If the history is unknown, replace the chain, guides and tensioner before fitting.
3. Prepare the turbo. Fit new oil feed and return seals, clean the intercooler and pipes of any oil or debris from the old engine, and prime the turbo with oil before starting.
4. Reset VANOS adaptations. Clear the VANOS adaptations so the ECU learns the camshaft positions of the new engine.
5. Teach the Valvetronic limit stops. Run the Valvetronic learning routine so the ECU knows the eccentric shaft limits.
6. Fill with the right oil and prime it. Fill with new oil of the correct specification and a new filter. Crank with the fuel and ignition disabled until oil pressure builds.
7. Coding and adaptations. On modern BMWs, the engine ECU must be matched to the car's immobiliser (CAS, FEM or BDC). Reset adaptations, register the battery and clear faults with diagnostic software.
8. First start and leak check. Start the engine, let it idle and watch oil pressure, temperature and fault codes. Check for leaks and bleed the cooling system.
9. First 1,000 km. Drive gently for the first few hundred kilometres, vary the engine speed and avoid full load. Change the oil and filter after about 1,000 km to remove any assembly debris.

The full fitting and first-start procedure.

340i engine questions

Will the B58B30 engine fit my BMW F30 340i?

Yes, if your BMW F30 340i was built with the B58B30. BMW used this 3.0 liter (2,998 cc) petrol engine with 250 kW (340 HP) in the F30 340i from about 2015 to 2020.

In our records the B58B30 is the engine for the F30 340i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.

Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

See all B58 Engines · Search B58B30 in the shop

How much is a replacement B58B30 engine for a BMW F30 340i?

A used B58B30 for the BMW F30 340i costs from about 4.150 € to 6.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B58B30 you buy is photographed and checked in Hamburg before it is listed.

Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

See all B58 Engines · Search B58B30 in the shop

How much is a replacement B58B30 engine for a BMW G01 X3 M40i?

A used B58B30 for the BMW G01 X3 M40i costs from about 4.150 € to 6.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B58B30 you buy is photographed and checked in Hamburg before it is listed.

Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

See all B58 Engines · Search B58B30 in the shop

How long does delivery of a B58B30 engine take?

Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day. Delivery to the Netherlands, Belgium, Germany, France, Luxembourg and Denmark takes 1 to 3 working days.

Spain, Italy, Portugal, Poland, Czechia, Austria, Ireland, the Nordics and the Baltics take 2 to 5 working days. Greek and Spanish islands, Malta, Cyprus and remote areas take 4 to 8 working days. The UK and other countries outside the EU are quoted one by one.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

You get a tracking number when the pallet is collected. Check the wrapping before you sign, and note any damage on the paperwork.

See all B58 Engines · Search B58B30 in the shop

How do I know a used B58B30 engine is in good shape?

Before a unit is listed, the yard checks the engine code against the listing, writes down the parts fitted to it, seals every opening and photographs the real engine you will receive. An inspection certificate for the unit can travel with the order when you ask for it.

When you look at a listing, check the recorded mileage, the year and the photos of the ports and the stamp. Ask for photos of anything you want to see closer. You can ask for extra photos, a close-up of the code stamp or a short video before you order.

On a petrol engine like the B58B30, a careful fitter will also look at the spark plugs, the coils and the timing side before the engine goes in.

If the engine fails inside under normal use, the warranty covers you. Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop.

See all B58 Engines · Search B58B30 in the shop

How much does a used BMW B58B30 engine cost?

A used BMW B58B30 engine in our yard usually costs between 4.150 € and 6.450 €. The exact price depends on the year, the mileage and the parts that come with the engine.

Our units show recorded mileage from about 22,000 km up to around 200,000 km. Lower mileage and more ancillaries mean a higher price. Each listing shows its own price, and the price you see is the price you pay. Prices include VAT for private buyers.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you order a gearbox or a second engine on the same order, the fee is still charged once.

Inside the EU there is no import duty. For the UK and other non-EU countries, import duty and local VAT are paid by the receiver, and we supply a commercial invoice.

See all B58 Engines · Search B58B30 in the shop

Is the BMW B58B30 a diesel or petrol engine?

The B58B30 is a petrol engine. It is a 3.0 liter (2,998 cc) inline 6, DOHC, 24 valve unit with a twin-scroll turbocharger, and it was built to the Euro 6 emission standard.

The emission standard matters for registration and for low-emission zones in many cities. When you replace an engine with the same code, the car keeps the same paperwork and the same emission class.

Petrol versions need the correct catalytic converters and oxygen sensors on the car to stay legal and to keep the engine computer happy. Reuse the parts from your car if they are in good condition.

If you are not sure which version you need, send us your VIN. We tell you the right code for free.

See all B58 Engines · Search B58B30 in the shop

Will the B58B30 engine fit my BMW F30 340i?

Yes, if your BMW F30 340i was built with the B58B30. BMW used this 3.0 liter (2,998 cc) petrol engine with 250 kW (340 HP) in the F30 340i from about 2015 to 2020.

In our records the B58B30 is the engine for the F30 340i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F30 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.

Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

See all B58 Engines · Search B58B30 in the shop

What is the difference between the B58B30 and other B58 engines?

The B58B30 makes 250 kW (340 HP) and 500 Nm. The other B58 engines are: B58B30M1 with 275 kW (374 HP) and 500 Nm (2019 to 2026).

Engines in one family share a basic block, but the turbo, the injection, the sensors and the engine computer can differ. A higher power version often has different pistons, a bigger turbo or a different fuel system.

This is why we ask for the exact code. Fitting a different version can work, but the wiring, the software and sometimes the gearbox must be changed to match.

Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

See all B58 Engines · Search B58B30 in the shop

How much is a replacement B58B30 engine for a BMW G11 740i?

A used B58B30 for the BMW G11 740i costs from about 4.150 € to 6.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B58B30 you buy is photographed and checked in Hamburg before it is listed.

Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

See all B58 Engines · Search B58B30 in the shop

Delivery, warranty and payment

Before a 340i engine leaves our Hamburg yard it is drained of oil and coolant, every opening is sealed, and it is strapped to a pallet and wrapped. We send photographs of the packed unit and the tracking details.

Door-to-door delivery is included to the address you give at checkout. Typical delivery takes three to five working days within Germany and neighbouring countries and five to ten working days to the rest of Europe and the UK.

A 12-month warranty covers eligible internal failure when the engine is fitted by a qualified workshop with new fluids and filters. You can pay by card, bank transfer or crypto and receive the invoice by email straight away.

All F30 engines · B58 engine guide · BMW 340i engines for sale · Send us your VIN