BMW Z4 22i Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW Z4 22i engine specialists. Compare prices on reconditioned, rebuilt and used M54B22 engines for your E85 roadster - supply & fit available nationwide.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £1,200 to £2,600
Used from £800 · Reconditioned from £1,400 · Common codes: M54B22 (226S1)
From £800
Tested, bare/short engine
From £1,400
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK BMW Z4 22i specialists.
3 Simple Steps3 Simple Stepsto Finding the Best BMW Z4 22i Replacement Engineto Finding the Best BMW Z4 22i Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW Z4 22i - Engine History & Specs at a Glance
The BMW Z4 22i arrived in October 2003 as the entry-level straight-six variant of the E85 Z4 range, powered by the M54B22 2.2-litre naturally aspirated engine. Slotting between the 2.0i four-cylinder and the 2.5i/3.0i six-cylinder models, the 22i offered the smooth, refined character of BMW's inline-six at a more accessible price point. Production ran until October 2005, when the facelift E85 models transitioned to the N52 engine family.
Variant HistoryBMW Z4 22i - Engine History & Specs at a Glance
The BMW Z4 22i arrived in October 2003 as the entry-level straight-six variant of the E85 Z4 range, powered by the M54B22 2.2-litre naturally aspirated engine. Slotting between the 2.0i four-cylinder and the 2.5i/3.0i six-cylinder models, the 22i offered the smooth, refined character of BMW's inline-six at a more accessible price point. Production ran until October 2005, when the facelift E85 models transitioned to the N52 engine family.
BMW Z4 22i
Fuel TypePetrol
Engine Size2.2L (2,171cc)
Power Output170hp (125kW) at 6,100rpmEngine History Timeline
October 2003 - BMW Z4 22i (E85) launches with the M54B22 2.2-litre naturally aspirated straight-six petrol engine producing 170hp and 210Nm of torque
2005 - Z4 22i production continues with the M54B22 engine unchanged; available with 5-speed manual or 5-speed automatic transmission
October 2005 - Z4 22i discontinued as E85 facelift introduces N52 engine family; the 2.2-litre displacement is not carried over
Key Specs Snapshot
Fuel TypePetrolEngine Size2.2L (2,171cc)Power Output170hp (125kW) at 6,100rpmTorque210Nm at 3,500rpmBore × Stroke80.0mm × 72.0mmCompression Ratio10.8:1ValvetrainDOHC, 4 valves per cylinder, Double-VANOSFuel SystemMulti-point injection (Bosch Motronic MS45)Years Produced2003-2005Every engine fitted to the BMW Z4 22i is covered below, with UK rebuilt pricing and known failure points.
BMW Z4 22i Engine Codes - Specifications & Replacement CostBMW Z4 22i Engine Codes - Specifications & Replacement Cost
2.2L Petrol (2003-2005)
Power Output170hp (125kW) at 6,100rpmTorque210Nm at 3,500rpmDisplacement2,171ccBore × Stroke80.0mm × 72.0mmCompression Ratio10.8:1ValvetrainDOHC, 4 valves per cylinder, Double-VANOSYears Fitted2003-2005 (E85)
Compatible Trim Levels
- 2.2i
- 2.2i SE
- 2.2i Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£800-£1,600
Reconditioned
Addressed known issues, tested
£1,400-£2,200
Rebuilt
Full teardown, upgraded internals
£1,800-£2,600
Common Failure
The M54B22 is generally a robust and characterful engine, but several age-related issues are well documented. Oil leaks from the valve cover gasket and oil filter housing are very common. The crankcase ventilation valve (CCV) system fails, leading to oil consumption and rough idle. VANOS seal degradation causes hesitation and loss of low-end power. Cooling system components - water pump, thermostat, and expansion tank - are known weak points. Timing chain guide wear can also occur on higher-mileage units.
The BMW Z4 22i is powered exclusively by the M54B22 2.2-litre straight-six - a smooth, characterful engine that shares its architecture with the larger M54B30. However, with production ending in 2005, all examples are now 20+ years old, and age-related failures are common. Every rebuilt M54B22 engine supplied through EnginesMarket includes upgraded components addressing the original failure points - plus a minimum 12-month unlimited mileage warranty.
Why the BMW Z4 22i M54B22 Burns Oil and Runs Rough
Affected Vehicles
BMW Z4 22i (M54B22, 2003-2005)
Typical Failure Mileage
60,000-100,000 miles
Root Cause
The crankcase ventilation valve (CCV) system's oil separator diaphragm fails, allowing oil to be drawn into the intake manifold. This causes oil consumption, blue smoke from the exhaust, rough idle, and eventually catalytic converter damage if ignored.
Why It Happens
The crankcase ventilation valve (CCV) system's oil separator diaphragm fails, allowing oil to be drawn into the intake manifold. This causes oil consumption, blue smoke from the exhaust, rough idle, and eventually catalytic converter damage if ignored.
Dealer (parts + labour)
£500-£800
Specialist (parts + labour)
£300-£550
What it involves
Replace CCV valve, hoses, and oil separator with updated cold-weather version
Suitability
60,000-100,000 miles. Prevents oil consumption and misfires
1 - 2 daysDealer (parts + labour)
£700-£1,100
Specialist (parts + labour)
£450-£750
What it involves
Replace CCV system and intake manifold gaskets while manifold is removed
Suitability
Recommended if manifold is off for CCV access
1 - 2 daysDealer (parts + labour)
£3,500-£5,000
Specialist (parts + labour)
£2,200-£3,800
What it involves
Supply & fit rebuilt M54B22 with upgraded CCV components, 12-month warranty
Suitability
Required if oil starvation caused bearing damage
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor - CCV system replacement Minor | £500-£800 | £300-£550 | Replace CCV valve, hoses, and oil separator with updated cold-weather version | 60,000-100,000 miles. Prevents oil consumption and misfires | 1 - 2 days |
 Intermediate - CCV + intake manifold gaskets Best Value | £700-£1,100 | £450-£750 | Replace CCV system and intake manifold gaskets while manifold is removed | Recommended if manifold is off for CCV access | 1 - 2 days |
Full Replacement - rebuilt/reconditioned engine (catastrophic oil starvation) Best Value | £3,500-£5,000 | £2,200-£3,800 | Supply & fit rebuilt M54B22 with upgraded CCV components, 12-month warranty | Required if oil starvation caused bearing damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical BMW Z4 22i in the UK is worth between £3,000 and £8,000 depending on condition and mileage. With a full rebuilt engine costing £2,200-£3,800 fitted, replacement cost can approach a significant portion of the vehicle's value. However, for well-maintained examples with good bodies and interiors, replacement is often worthwhile - particularly given the rising classic status of the E85 Z4.
Our Recommendation
Our Recommendation
If your Z4 22i shows signs of oil consumption or rough idle, have the CCV system inspected immediately. A £300-£550 specialist replacement is far cheaper than a £2,200-£3,800 engine rebuild. If the engine has already suffered oil starvation and bearing damage, only a full rebuilt engine will save the car.
Don't Let Engine Failure Write Off Your BMW Z4 22i
A failed M54B22 engine doesn't have to mean the end of the road for your Z4 22i. Whether you're facing CCV system failure, VANOS seal degradation, cooling system issues, or oil leaks, EnginesMarket connects you with trusted UK BMW specialists who supply rebuilt M54B22 engines with upgraded components specifically designed to address these original failure points. Every engine comes with a minimum 12-month unlimited mileage warranty, nationwide delivery, and supply & fit options across the UK. Compare prices today - and keep your E85 roadster on the road without paying the main dealer premium.
Compare rebuilt M54B22 BMW Z4 22i engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific BMW Z4 22i. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW Z4 22i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW Z4 22i engine replacement cost in the UK-
A full BMW Z4 22i engine replacement typically costs £1,800-£2,600 supply-only for a rebuilt M54B22 unit, or £2,200-£3,800 fitted by a specialist.
- Used M54B22 engines: £800-£1,600 depending on mileage and condition
- Reconditioned units: £1,400-£2,200
- Professional fitting adds £800-£1,500 to the engine cost
Question 2Is the BMW Z4 22i M54B22 engine reliable-
The M54B22 is generally a robust and characterful straight-six engine. However, with the youngest examples now over 20 years old, age-related issues are common. The most frequent problems are oil leaks (valve cover gasket and oil filter housing), CCV system failure causing oil consumption, VANOS seal degradation, and cooling system component failure. Regular maintenance and proactive replacement of known weak points are essential for longevity.
-> Get quotes for BMW Z4 22i M54B22 engine repairs and replacementQuestion 3What are the signs of VANOS failure in a BMW Z4 22i M54B22-
The most common warning signs of VANOS failure in the Z4 22i are:
- Hesitation or flat spot on acceleration, particularly below 3,000rpm
- Loss of low-end torque and poor throttle response
- Rattling noise from the front of the engine at idle
- Reduced fuel economy
Question 4Is it worth replacing the engine on a BMW Z4 22i-
For a Z4 22i worth £3,000-£8,000, a £2,200-£3,800 rebuilt engine can make financial sense if the body, gearbox, and interior are in good condition - particularly given the E85 Z4's rising classic status.
- Compare replacement cost against vehicle value - replacement is viable up to approximately 70% of the car's value
- Well-maintained examples with good bodywork are worth saving
- Always factor the 12-month warranty into your replacement decision
Question 5What causes the BMW Z4 22i M54B22 CCV system to fail-
The CCV (crankcase ventilation) system's oil separator diaphragm fails due to age and heat cycling, allowing oil to be drawn into the intake manifold.
- Symptoms include oil consumption, blue smoke from exhaust, rough idle, and misfires
- Replacement with an updated cold-weather version is recommended
- Cost at a specialist is £300-£550
Question 6Can I replace my BMW Z4 22i engine with a different engine-
Engine swaps to a different size or type are technically complex and rarely cost-effective for the Z4 22i:
- The M54B22 is the only engine fitted to the 22i from the factory - stick to like-for-like replacement
- Swapping to a 2.5i or 3.0i (M54B25/M54B30) requires different ECU, wiring, and potentially transmission
- Swapping to an N52 (facelift engine) requires significant modification
- Insurance must be notified of any non-standard engine swap
- Our marketplace only recommends like-for-like code-matching for warranty coverage
Why Choose UsCompare BMW Z4 22iEngine PricesToday
50+ M54B22 engines supplied through our network
12-Month Warranty on every rebuilt BMW Z4 22i engine
Nationwide UK delivery
supply & fit available
Comparing quotes for your BMW Z4 22i is free, no-obligation, and specific to your exact engine code and vehicle. Enter your registration above - our trusted UK network of BMW E85 specialists will send you tailored prices for used, reconditioned, and rebuilt M54B22 engines with warranty. Keep your E85 roadster on the road without paying the dealer premium.
Enter your registration
and get matched with verified BMW Z4 22i specialists.