How much does a BMW Z4 E89 engine replacement cost in the UK?

A reconditioned E89 engine typically costs £2,000–£7,500 supply only, depending on engine -the N52 3.0i sits at £2,500–£4,500, while the twin-turbo N54 35is runs £4,000–£7,500. Fitting adds £650–£1,040. Use our calculator for a personalised figure.

Which Z4 E89 engine is the most reliable?

The N52B30 (sDrive30i, 2009–2011) is widely regarded as the most reliable and characterful E89 engine -a 3.0-litre naturally-aspirated straight-six with 258 PS, a glorious soundtrack and proven durability. The N52B25 (sDrive23i) is also highly reliable. The N20 four-cylinders are generally reliable but timing chain guides require attention.

What are the common problems with the Z4 E89?

Timing chain guide wear on the N20 four-cylinders (sDrive20i, sDrive28i), cooling system and VANOS issues on the N52 six-cylinders (sDrive23i, sDrive30i), HPFP and injector failure on the N54 (sDrive35i, sDrive35is), and retractable hardtop mechanism issues across all variants. All are well-understood by BMW specialists.

Is the BMW Z4 E89 reliable overall?

Yes -but it depends on the engine. The N52 six-cylinders are genuinely robust; the N20 fours are reliable with timing chain attention; the N54 is the most complex and expensive to maintain but offers the most performance. The E89 is a modern classic roadster; maintenance costs reflect its engineering.

Which Z4 E89 engine should I avoid?

No outright avoidance -but a 2009–2011 N54-powered sDrive35i without documented HPFP, injector or wastegate history deserves a thorough inspection. A 2011–2016 N20-powered car without documented timing chain history also merits a thorough inspection. The sDrive23i or sDrive30i (N52) are the safest choices.

How do I know if my Z4 E89 engine needs replacing?

Cold-start rattle (N20 timing chain), coolant loss or overheating (N52 cooling system), long cranking or limp mode (N54 HPFP), or blue smoke on startup (N54 injectors) are key warnings. Use our diagnostic calculator for a personalised assessment.

Is it worth replacing a Z4 E89 engine, or should I scrap the car?

Depends on the car's value. Against a well-kept £8,000+ E89, a £3,200 N52 recon is 40% of the car's value -safe. Against a tired £5,000 example, the same recon is 64% -approaching our 70% BMW threshold, assess carefully. For sDrive35is models, the calculus is different: these are future classics where engine replacement can be justified if the car is otherwise excellent.

How long do Z4 E89 engines last?

The N52 six-cylinders can exceed 150,000 miles with regular maintenance and cooling system attention. The N20 four-cylinders are capable of 150,000+ miles with timing chain care. The N54 is performance-oriented but can reach 150,000+ miles with HPFP and injector attention.

What is the difference between the E89 and the earlier E85 Z4?

The E85 (2002–2008) is the first-generation Z4 -a traditional soft-top roadster with Z4 M models and the M54/N52 engines. The E89 (2009–2016) is the second-generation -a retractable hardtop with N52, N20 and N54 engines. The E89 is more refined and more modern; the E85 is more raw and classic. Costs and maintenance differ significantly -see each generation's own page for specifics.

How do I find my Z4 E89 engine code?

Check the VIN plate, vehicle documentation, or the engine block -2.0-litre four-cylinder N20 variants include N20B20 (sDrive18i), N20B20A (sDrive20i), and N20B20B (sDrive28i); 2.5-litre six-cylinder is N52B25 (sDrive23i); 3.0-litre six-cylinder is N52B30 (sDrive30i); 3.0-litre twin-turbo six-cylinder is N54B30 (sDrive35i) or N54B30T0 (sDrive35is). Tell us your variant and registration year and we'll identify it -20+ vetted BMW specialists will confirm it for free.

BMW Z4 E89Roadster2009–2016

BMW Z4 E89 Engines — The Complete UK Guide

Every engine fitted to the second-generation Z4 E89 — from the 2.0-litre N20 four-cylinder to the naturally-aspirated N52 six-cylinders and the twin-turbo N54 in the sDrive35i and 35is.

Real UK costs, honest reliability data, and BMW's first retractable-hardtop roadster.

Backed by genuine UK specialist data for 2025.

Explore E89 Engines

E89 Enquiries (2025) -pattern data
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8+Engine Codes
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E89 Enquiries (2025) -pattern data
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Engine Database

BMW Z4 E89 Engine Codes — The Complete Database

Every engine fitted to the Z4 E89 specifically — from the entry-level sDrive18i to the range-topping sDrive35is.

Engine CodeFuelPowerYearsReliabilityEnquiries (2025)Avg. Recon Cost

N20B20N20Petrol115 kW(156 PS)2013–2016★★★★☆PROVISIONALpending dedicated Engine Page—(pattern data)£2,200–£3,800[BMW-QUOTE]

N20B20AN20Petrol135 kW(184 PS)2011–2016★★★★☆PROVISIONALpending dedicated Engine Page—(pattern data)£2,500–£4,200[BMW-QUOTE]

N52B25N52Petrol150 kW(204 PS)2009–2011★★★★☆PROVISIONALpending dedicated Engine Page—(pattern data)£2,000–£3,500[BMW-QUOTE]

N20B20BN20Petrol180 kW(245 PS)2011–2016★★★★☆PROVISIONALpending dedicated Engine Page—(pattern data)£2,800–£4,800[BMW-QUOTE]

N52B30N52Petrol190 kW(258 PS)2009–2011★★★★☆PROVISIONALpending dedicated Engine Page—(pattern data)£2,500–£4,500[BMW-QUOTE]

N54B30N54Petrol225 kW(306 PS)2009–2012★★★☆☆PROVISIONALpending dedicated Engine Page—(pattern data)£3,500–£6,500[BMW-QUOTE]

N54B30T0N54Petrol250 kW(340 PS)2010–2016★★★☆☆PROVISIONALpending dedicated Engine Page—(pattern data)£4,000–£7,500[BMW-QUOTE]

Overview

BMW Z4 E89 — Overview

The second-generation BMW Z4 (codenamed E89) was produced from February 2009 to August 2016, replacing the E85/E86 Z4. Built at BMW's Regensburg plant in Germany, the E89 was the first Z Series model to feature a retractable two-piece aluminium hardtop roof, eliminating the need for separate roadster and coupé versions. The engine range launched with three naturally-aspirated six-cylinder petrols: the sDrive23i (2.5L, 204 PS), sDrive30i (3.0L, 258 PS) and twin-turbo sDrive35i (3.0L, 306 PS).

A high-performance sDrive35is (340 PS) joined the range in March 2010. A November 2011 update replaced the N52 six-cylinders with turbocharged 2.0-litre N20 four-cylinders (sDrive20i and sDrive28i). An April 2013 facelift added the entry-level sDrive18i.

Key Facts

PlatformBMW L2 (shared with E87 1 Series, E90 3 Series)
PredecessorBMW Z4 E85/E86
SuccessorBMW Z4 G29
Sibling Body Styles in this GenerationN/A — E89 is the sole body code

Market Intelligence

The E89 Z4 generates steady UK specialist enquiries, concentrated on the sDrive20i, sDrive28i and sDrive35i as these stylish roadsters enter enthusiast-car territory.

04Best & Worst Engines

Best & Worst Engines

Thin-Data Summary

Thin-Data Fallback mode — one paragraph: The E89 Z4's engine range offers something for every buyer. The N52B30 (sDrive30i, 2009–2011) is widely regarded as the most characterful — a 3.0-litre naturally-aspirated straight-six with 258 PS, a glorious soundtrack and proven reliability. The N52B25 (sDrive23i) offers 204 PS with similar character but less power. The later N20B20B (sDrive28i, 2011–2016) delivers 245 PS from its 2.0-litre turbo four — more power than the sDrive23i and better economy than the sixes, though the four-cylinder note is less evocative. The N20B20A (sDrive20i) offers 184 PS — a capable entry point. The N54B30 (sDrive35i, 2009–2012) delivers 306 PS from its twin-turbo straight-six, but the N54 is known for fuel injector, HPFP and wastegate issues — it's the most complex and expensive E89 engine to maintain. The N54B30T0 (sDrive35is, 2010–2016) offers 340 PS with an overboost function — the ultimate E89, but with the same N54 vulnerabilities. For most buyers, the sDrive30i (N52) offers the best blend of character, reliability and driving enjoyment; the sDrive28i (N20) is the best modern choice for economy and daily usability.

Thin-Data Summary

BMW Z4 E89
Ownership Economics

Engine

Typical Mileage

Common Major Failure

Repair Cost (Specialist)

Replacement Cost (Recon)

Ownership Verdict

N20B20 (sDrive18i/20i)60k–100kTiming chain guides, VANOS£600–£1,500£2,200–£4,200

Solid Choice -reliable four-cylinder

N52B25 (sDrive23i)80k–120kCooling system, VANOS£400–£900£2,000–£3,500

Solid Choice -characterful six

N20B20B (sDrive28i)60k–100kTiming chain guides, VANOS£600–£1,500£2,800–£4,800

Best Four -N20 with N52-rivalling power

N52B30 (sDrive30i)80k–120kCooling system, VANOS£400–£900£2,500–£4,500

Best Six -the one to buy

N54B30 (sDrive35i)60k–100kHPFP, injectors, wastegate, turbo£800–£2,500£3,500–£6,500

Watch Closely -fast but complex

N54B30T0 (sDrive35is)60k–100kHPFP, injectors, wastegate, turbo£800–£2,500£4,000–£7,500

Flagship -ultimate E89, N54 risk

Engine

Typical Mileage

Common Major Failure

Repair Cost (Specialist)

Replacement Cost (Recon)

Ownership Verdict

N20B20 (sDrive18i/20i)60k–100kTiming chain guides, VANOS£600–£1,500£2,200–£4,200

Solid Choice -reliable four-cylinder

N52B25 (sDrive23i)80k–120kCooling system, VANOS£400–£900£2,000–£3,500

Solid Choice -characterful six

N20B20B (sDrive28i)60k–100kTiming chain guides, VANOS£600–£1,500£2,800–£4,800

Best Four -N20 with N52-rivalling power

N52B30 (sDrive30i)80k–120kCooling system, VANOS£400–£900£2,500–£4,500

Best Six -the one to buy

N54B30 (sDrive35i)60k–100kHPFP, injectors, wastegate, turbo£800–£2,500£3,500–£6,500

Watch Closely -fast but complex

N54B30T0 (sDrive35is)60k–100kHPFP, injectors, wastegate, turbo£800–£2,500£4,000–£7,500

Flagship -ultimate E89, N54 risk

The E89 rule

A £2,500–£4,500 N52 recon against a £4,000–£12,000 E89 sits at 21–113% of the car's value. On a sub-£5,000 high-mileage example, that brushes our 70% BMW threshold -we'll honestly tell you to walk away. Against a well-kept £8,000+ example, the same recon drops to 31–56% -a repair decision, not a financial one. For N54 cars, the calculus is different: these are performance roadsters where maintenance costs are part of the ownership experience.

Common Problems

N20

Timing Chain Guide Wear

Affected models:

sDrive18i, sDrive20i, sDrive28i (N20 engine, 2011–2016).

Typical failure mileage:

60,000–100,000 miles.

Root cause:

The N20's timing chain guides are a known weak point -they can become brittle and fail, leading to chain stretch or catastrophic engine failure. This is the same vulnerability shared with the N20 in the F30 3 Series. Cold-start rattle is the classic early warning.

Tiered Cost Table

Preventative (Repair)

Dealer

Specialist

£1,200–£2,200

£600–£1,500

Catastrophic (Replacement)

Dealer

Specialist

£4,000–£6,500

£2,800–£4,800

Our Recommendation

If your N20-powered E89 has no documented timing chain history, treat it as a priority inspection -£600–£1,500 now is far cheaper than the £2,800+ replacement that follows a failure. Cold-start rattle is the warning sign to watch for.

Compare N20 engine prices for your E89

N52

Cooling System & VANOS

Affected models:

sDrive23i, sDrive30i (N52 engine, 2009–2011).

Typical failure mileage:

80,000–120,000 miles.

Root cause:

The N52 is generally robust, but cooling system components -water pump, thermostat housing, expansion tank -are known weak points. VANOS units can develop rattle or loss of low-end torque. The N52 is otherwise one of BMW's most reliable engines.

Tiered Cost Table

Preventative (Repair)

Dealer

Specialist

£600–£1,200

£400–£900

Catastrophic (Replacement)

Dealer

Specialist

£3,000–£5,000

£2,500–£4,500

Our Recommendation

On any N52-powered E89, budget for cooling system preventative maintenance at 80,000 miles -a £400–£900 repair is cheaper than the £2,500+ replacement that follows an overheating failure.

Compare N52 engine prices for your E89

N54

HPFP & Injector Failure

Affected models:

sDrive35i, sDrive35is (N54 engine, 2009–2016).

Typical failure mileage:

60,000–100,000 miles.

Root cause:

The N54's high-pressure fuel pump (HPFP) is a notorious weak point -failure causes long cranks, loss of power and limp mode. Early fuel injectors are also known to be unreliable, with Index 12 being the latest reliable revision. Wastegate rattle on the twin turbos is another common issue.

Tiered Cost Table

Preventative (Repair)

Dealer

Specialist

£1,200–£2,500

£800–£2,000

Catastrophic (Replacement)

Dealer

Specialist

£4,500–£8,000

£3,500–£7,500

Our Recommendation

If you're buying an N54-powered E89, check if the HPFP has been replaced and whether the injectors are Index 12 (the latest reliable revision). An £800–£2,000 preventative investment is cheaper than the £3,500+ replacement that follows a failure. The E89 was the final model powered by the N54, produced until 2016.

Compare N54 engine prices for your E89

Retractable

Hardtop Mechanism

Affected models:

All E89 variants (2009–2016).

Typical failure mileage:

60,000+ miles.

Root cause:

The E89's complex two-piece aluminium hardtop mechanism is a known weak point -microswitch failures, broken wiring and relay issues are common. The roof is the most complex component on the E89 and the most common source of non-engine related enquiries.

Tiered Cost Table

Preventative (Repair)

Dealer

Specialist

£800–£1,800

£400–£1,200

Catastrophic (Replacement)

Dealer

Specialist

£3,000–£5,000

£2,000–£4,000

Our Recommendation

The roof is the E89's Achilles heel -have it inspected regularly and address microswitch or wiring issues promptly. Many roof repairs are cheap and easy to fix (micro switches, relays) but broken wires inside the main roof section are a nightmare.

Compare E89 roof repair prices

E89
Engine Replacement Costs -By Engine and Condition

Variant

Engine Code

Used (Supply)

Reconditioned (Supply)

Rebuilt (Supply)

Labour Hours

sDrive18iN20B20£1,200–£2,500£2,200–£3,800£3,200–£5,00010–14 hrs

sDrive20iN20B20A£1,500–£2,800£2,500–£4,200£3,500–£5,50010–14 hrs

sDrive23iN52B25£1,000–£2,200£2,000–£3,500£3,000–£5,00010–14 hrs

sDrive28iN20B20B£1,800–£3,200£2,800–£4,800£4,000–£6,50010–14 hrs

sDrive30iN52B30£1,200–£2,500£2,500–£4,500£3,500–£6,00010–14 hrs

sDrive35iN54B30£2,000–£3,500£3,500–£6,500£5,000–£8,00012–16 hrs

sDrive35isN54B30T0£2,500–£4,500£4,000–£7,500£6,000–£9,50012–16 hrs

No Generation variance from the Engine Page baseline -no dedicated Engine Pages exist for these families yet, so baseline figures are drawn from the EM_Proprietary_Data Table A. Labour hours estimated at 10–14 hours for four- and six-cylinder engines, and 12–16 hours for the N54 due to additional turbo complexity. The E89's engine bay is relatively spacious but the N54's twin turbos add complexity.

Diesel & Petrol Lineup

Petrol Variants

Scope note: All variants listed are Z4 E89 only. The sDrive23i and sDrive30i (N52 six-cylinders) were produced 2009–2011; the sDrive20i and sDrive28i (N20 four-cylinders) replaced them from 2011–2016; the sDrive18i joined the range in 2013; the sDrive35i was produced 2009–2012; the sDrive35is was produced 2010–2016. There was no Z4 M model for the E89 generation.

Market Intelligence

Most Requested Engines (2025)

Most Requested Variants

Average Replacement Cost

Most Common Failures

Most Requested Engines (2025)

Most Requested Variants

Average Replacement Cost

Most Common Failures

Most Requested Engines (2025)

Most Requested Variants

Average Replacement Cost

Most Common Failures

Diesel & Petrol Lineup

Petrol Variants

Market Intelligence

Most Requested Engines (2025)

Most Requested Variants

Average Replacement Cost

Most Common Failures

Most Requested Engines (2025)

Most Requested Variants

Average Replacement Cost

Most Common Failures

Most Requested Engines (2025)

Most Requested Variants

Average Replacement Cost

Most Common Failures

FAQ

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BMW Z4 E89 Engines — The Complete UK Guide

BMW Z4 E89 Engine Codes — The Complete Database

BMW Z4 E89 — Overview

Best & Worst Engines

BMW Z4 E89 Ownership Economics

Common Problems

E89Engine Replacement Costs -By Engine and Condition

Diesel & Petrol Lineup

Market Intelligence

Diesel & Petrol Lineup

Market Intelligence

FAQ

Why UK BMW Z4 E89 OwnersTrust BMWEngines.uk

BMW Z4 E89
Ownership Economics

E89
Engine Replacement Costs -By Engine and Condition

Why UK BMW Z4 E89 Owners
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