BMW Z4 30i (E89) engine: which one, problems and replacement

The BMW Z4 30i in the second Z4 generation (E89, built 2009–2016) was built with one engine, the N52B30: a 3.0 L petrol inline-6 with 258 hp.

This guide tells you which engine your Z4 30i has, what goes wrong with it, what a replacement costs from our stock and what else to plan for when you fit one.

• Generation: second Z4, 2009–2016
• Body styles: E89 (folding hard-top roadster)
• Engines: N52B30
• Output: 258 hp
• Replacement engines in stock: 128 from 1.861,00 €

Which engine is in your Z4 30i?

N52B30 in the Z4 30i

The N52B30 was used in the E89 Z4 30i, built 2004–2015. It is a 3.0 L naturally aspirated petrol inline-6 with 258 hp and 300 Nm.

Reading the code: N marks an N-series code, the generation of BMW engines introduced from 2001; 52 is the family number; B stands for petrol (from the German Benzin); 30 is the capacity in decilitres, so 3.0 litres.

Z4 30i engines by model year

The Z4 30i kept the same engine for the whole E89 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 Z4 30i

A replacement engine does not have to come from another Z4 30i. 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.

N52B30: BMW E90 330i, BMW E60 530i, BMW E70 X5 30i, BMW E83 X3 3.0si.

How to confirm your engine code

The Z4 30i only used the N52B30, 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 Z4 30i engine problems

The N52B30 in the Z4 30i shares the known weak points of the N52 family. Full N52 guide.

Hydraulic lifter tick. Some engines tick on cold start because lifters drain down.

Electric water pump and thermostat. The pump fails around 100,000 km with little warning.

Valve cover gasket and eccentric shaft sensor. The plastic valve cover leaks and its sensor gasket fails.

Oil filter housing gasket. Leaks oil down the block and onto belts.

VANOS solenoids. Dirty solenoids cause rough idle and codes.

Symptoms to watch for on the Z4 30i

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.

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.

Looking after the Z4 30i engine

• Oil: 5W-30 BMW Longlife-01 or 04, about 6.5 litres.
• Service interval: Oil every 10,000 to 15,000 km.
• Timing drive: Timing chain at the front.
• Workshop notes: Fit a new water pump and thermostat with any used N52; they are on the outside and cheap compared with labour later.

Buying a used engine for the Z4 30i: checklist

1. Sump, oil pickup and drive variants. Rear-drive, xDrive and front-drive cars can use different sumps, oil pickups and engine mounts even with the same engine code. Check that the sump matches your subframe and front axle.
2. Warranty terms in writing. Read what the warranty covers, how long it runs and what fitting conditions apply. Most warranties require a qualified workshop, new fluids and filters, and replacement of the cooling parts that caused the original failure.
3. 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.
4. Why your old engine failed. Before fitting a replacement, find out why the original failed. An overheating radiator, a blocked intercooler or a failed turbo can destroy a second engine if they are not fixed.
5. Look at the oil and coolant. Clean oil without metal particles and coolant without oil are good signs. Milky oil, oily coolant or a burnt smell mean the engine needs further checks before it is fitted.
6. 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.
7. 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.
8. 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.
9. 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.
10. Electric water pump. This engine uses an electric water pump. It fails without warning and needs a diagnostic bleeding routine when it is replaced or the system is refilled.

BMW Z4 30i replacement engine cost

We currently hold 128 Z4 30i engine engines. The cheapest is 1.861,00 €, the most expensive 2.949,00 €, and half of them cost less than 2.463,00 €.

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.

Z4 30i engine prices by model year

Engines from 2005–2009 have a median of 2.463,00 €, while units from 2010–2014 sit at 2.431,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

Z4 30i 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.

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 Z4 30i

Here is a selection of Z4 30i engines currently on our shelves, photographed in the yard. Click any of them for the full photographs, mileage and specification.

BMW E60 530i N52B30 Engine 2010, 115,200 km2.406,00 €BMW E60 530i N52B30 Engine 2010, 179,400 km2.102,00 €BMW E60 530i N52B30 Engine 2007, 83,900 km2.661,00 €BMW E60 530i N52B30 Engine 2007, 100,900 km2.763,00 €BMW E60 530i N52B30 Engine 2006, 122,500 km2.632,00 €BMW E60 530i N52B30 Engine 2007, 28,200 km2.134,00 €BMW E60 530i N52B30 Engine 2009, 168,400 km1.942,00 €BMW E90 330i N52B30 Engine 2010, 142,200 km2.231,00 €BMW E60 530i N52B30 Engine 2006, 190,400 km2.506,00 €BMW E90 330i N52B30 Engine 2010, 116,400 km2.367,00 €BMW E90 330i N52B30 Engine 2010, 138,500 km2.566,00 €BMW E60 530i N52B30 Engine 2011, 107,700 km2.612,00 €

BMW E60 530i N52B30 Engine 2010, 115,200 km — 2.406,00 €, reduced from 3.450,00 €. It comes from a 2010 donor car with 115,200 km, and 6 units are available. We can confirm fitment against your VIN the same day.

BMW E60 530i N52B30 Engine 2010, 179,400 km — 2.102,00 €, reduced from 2.750,00 €. It comes from a 2010 donor car with 179,400 km, and 29 units are available. The listing shows every side of the engine and the fitted parts.

BMW E60 530i N52B30 Engine 2007, 83,900 km — 2.661,00 €, reduced from 3.450,00 €. It comes from a 2007 donor car with 83,900 km, and 22 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW E60 530i N52B30 Engine 2007, 100,900 km — 2.763,00 €, reduced from 3.950,00 €. It comes from a 2007 donor car with 100,900 km, and 15 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW E60 530i N52B30 Engine 2006, 122,500 km — 2.632,00 €, reduced from 3.750,00 €. It comes from a 2006 donor car with 122,500 km, and 16 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW E60 530i N52B30 Engine 2007, 28,200 km — 2.134,00 €, reduced from 3.150,00 €. It comes from a 2007 donor car with 28,200 km, and 11 units are available. We can confirm fitment against your VIN the same day.

BMW E60 530i N52B30 Engine 2009, 168,400 km — 1.942,00 €, reduced from 3.250,00 €. It comes from a 2009 donor car with 168,400 km, and 6 units are available. The listing shows every side of the engine and the fitted parts.

BMW E90 330i N52B30 Engine 2010, 142,200 km — 2.231,00 €, reduced from 3.100,00 €. It comes from a 2010 donor car with 142,200 km, and 29 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW E60 530i N52B30 Engine 2006, 190,400 km — 2.506,00 €, reduced from 3.400,00 €. It comes from a 2006 donor car with 190,400 km, and 13 units are available. The listing shows every side of the engine and the fitted parts.

BMW E90 330i N52B30 Engine 2010, 116,400 km — 2.367,00 €, reduced from 3.700,00 €. It comes from a 2010 donor car with 116,400 km, and 12 units are available. The listing shows every side of the engine and the fitted parts.

BMW E90 330i N52B30 Engine 2010, 138,500 km — 2.566,00 €, reduced from 3.750,00 €. It comes from a 2010 donor car with 138,500 km, and 20 units are available. The listing shows every side of the engine and the fitted parts.

BMW E60 530i N52B30 Engine 2011, 107,700 km — 2.612,00 €, reduced from 3.700,00 €. It comes from a 2011 donor car with 107,700 km, and 27 units are available. Ask the desk for compression figures or extra photographs before you order.

Will it fit my Z4 30i?

Will the N52B30 fit my BMW E89 Z4 30i?

The N52B30 is the original engine for the BMW E89 Z4 30i, which makes it the straightforward choice. The second Z4 was built 2009–2016, and the N52B30 was produced 2004–2015, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.

How much is a replacement engine for a BMW E89 Z4 30i?

We have 128 N52B30 engines in stock, priced from 1.861,00 € to 2.949,00 €. Delivery to your door is included, and the engine carries a 12-month warranty when fitted by a qualified workshop. Add fitting labour and the parts you replace at the same time — seals, cooling parts and mounts — to estimate the total.

Engine swaps and upgrades for the Z4 30i

These engines were fitted to other versions of the E89 at the factory, which makes them the most practical upgrades: the body was designed around them and many parts are shared.

Can I fit the N54B30 in my Z4 30i?

Yes, it is one of the more common upgrades. Both are petrol inline-6 engines, so the mounting points are similar, but the N54B30 needs its own wiring and engine control unit, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 48 hp and 100 Nm. In Germany and most of Europe an engine swap must be inspected and registered.

Fitting a replacement engine in the Z4 30i

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. Reset VANOS adaptations. Clear the VANOS adaptations so the ECU learns the camshaft positions of the new engine.
3. Teach the Valvetronic limit stops. Run the Valvetronic learning routine so the ECU knows the eccentric shaft limits.
4. 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.
5. 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.
6. 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.
7. 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.

Delivery, warranty and payment

Every Z4 30i engine we sell is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped before it leaves Hamburg. You receive photographs of the packed engine and a tracking number.

Delivery is door to door and included in the price. Most European addresses receive the engine within five to ten working days; Germany and its neighbours are usually faster.

Every engine carries a 12-month warranty on eligible internal failure when a qualified workshop fits it with new fluids and filters. Payment is by card, bank transfer or crypto; your invoice is emailed as soon as you order.

All E89 engines · N52 engine guide · Send us your VIN