How much does a BMW ActiveHybrid 3 engine replacement cost in the UK?

A reconditioned N55 engine typically costs £4,500–£6,500 supply only. A complete PHEV powertrain (engine + electric motor) costs £5,000–£8,500. Fitting adds £1,500–£2,500 depending on your location and workshop. The high-voltage battery is a separate component - replacement typically costs £3,000–£6,000.

Is the BMW ActiveHybrid 3 engine reliable?

The N55 straight-six is a proven, reliable engine - but it has known weak points: HPFP failure, chargepipe failure, and VANOS solenoid wear. The hybrid system adds complexity: battery degradation, electric motor / transmission integration issues, and high-voltage system concerns. The ActiveHybrid 3 is a rare, complex car - rewarding but with hybrid-specific risks.

What are the common problems with the BMW ActiveHybrid 3?

The most frequently reported issues are HPFP failure (N55's most notorious weak point), chargepipe failure (plastic cracks), VANOS solenoid wear, hybrid battery degradation, and electric motor / transmission integration problems. The battery is the single biggest long-term concern - it can cost more to replace than the car is worth.

Is it worth replacing a BMW ActiveHybrid 3 engine, or should I scrap the car?

Depends on which component has failed. Against a well-kept £18,000 ActiveHybrid 3, a £5,500 N55 replacement is 31% - worth it. But if the battery has failed (£3,000–£6,000) or the complete powertrain needs replacement (£5,000–£8,500), the maths changes. A £7,000 battery + powertrain replacement against a £15,000 car is 47% - approaching our 70% BMW threshold for PHEVs. Get a battery health report before committing.

How do I find my BMW ActiveHybrid 3 engine code?

Listed on the VIN plate and vehicle documentation. The ActiveHybrid 3 carries the engine code N55B30A (the same engine as the F30 335i). It's a 3.0-litre straight-six turbo petrol engine with an integrated electric motor, used in the F30 from 2013 to 2019.

Can I repair the HPFP on the N55, or does it need full engine replacement?

Yes - HPFP replacement is a well-understood repair costing £600–£1,200. It's the N55's most common weak point. If you experience long cranking or hesitation, don't ignore it - but it's a straightforward fix, not an engine killer. The same principle applies to the ActiveHybrid 3 as to any other N55-equipped BMW.

BMW ActiveHybrid 32013–20193.0L Turbo PHEV (N55 + e-motor)

BMW ActiveHybrid 3 Engine Replacement — Compare Prices & Get Quotes

Name: BMW ActiveHybrid 3 UK Engine & PHEV Enquiry Data 2025
Creator: BMWEngines.uk

Get quotes today from trusted UK BMW 3 Series specialists. Compare reconditioned, rebuilt and used N55 PHEV powertrains - supply & fit available nationwide.

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BMW ActiveHybrid 3 Engines - from £3,500 to £10,500Code: N55B30A + e-motor

BMW ActiveHybrid 3 Engines - from £3,500 to £10,500· Code: N55B30A + e-motor

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

The ACTIVEHYBRID 3 THROUGH TIME - Era Map

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

One engine throughout this badge's history - no era ambiguity.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

F30 (ActiveHybrid 3) BMW 320d F30 (ActiveHybrid 3)

2013–2019N55B30A (3.0L Straight-Six Turbo) + 80 PS e-motor★★★☆☆ [NEWLY ASSIGNED - see Data Note]£5,000–£8,500 [PLACEHOLDER - confirm vs cost sheet]One engine throughout this badge's history - no era ambiguity.

Why use this era map?

This table is the single source every other section on this page matches - Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW ActiveHybrid 3 Powertrain Replacement Costs

Supply Only£4,500–£6,500

Fitted (Indie)£5,800–£8,000

Warranty12–24 months

Best ForMost N55 engine failures

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine (N55 only)£3,500–£5,500£4,700–£7,0001–6 monthsBudget priority; engine failure only

Reconditioned Engine (N55 only)£4,500–£6,500£5,800–£8,00012–24 monthsMost N55 engine failures

Complete PHEV Powertrain (N55 + e-motor)£5,000–£8,500£6,500–£10,00012–24 monthsFull hybrid system replacement

Main Dealer New (complete unit)£9,000–£14,000+£10,500–£16,000+24–36 monthsInsurance jobs, warranty claims

Figures above reflect the N55 PHEV powertrain. The high-voltage battery is a separate component - replacement costs typically range from £3,000–£6,000 depending on battery condition and supplier.

Labour estimate: Fitting an ActiveHybrid 3 powertrain typically takes 14–20 hours at £70–£100/hr (independent) or £120–£180/hr (London/SE dealer). High-voltage system work requires specialist training and equipment.

→ Compare ActiveHybrid 3 engine prices from UK specialists

Common Problems With BMW 320d Engines

1. High-Pressure Fuel Pump (HPFP) Failure - N55

Symptoms: Long cranking on startup, hesitation under acceleration, engine stalling, engine warning light, reduced power.

Typical mileage: 40,000–80,000 miles.

Repair cost: £600–£1,200 (HPFP replacement) [PLACEHOLDER - confirm vs cost sheet]

Replacement cost: N/A - repair only

🟠 Check - book inspection urgently

Our recommendation:

The N55's HPFP is its most notorious weak point. If you experience long cranking or hesitation, don't ignore it - a failing HPFP can lead to lean running and catalytic converter damage. The ActiveHybrid 3 uses the same HPFP as the standard N55, so the same warning applies. The replacement is well-understood and well-documented.

Read the full HPFP failure guide

1. High-Pressure Fuel Pump (HPFP) Failure - N55

Symptoms: Long cranking on startup, hesitation under acceleration, engine stalling, engine warning light, reduced power.

Typical mileage: 40,000–80,000 miles.

Repair cost: £600–£1,200 (HPFP replacement) [PLACEHOLDER - confirm vs cost sheet]

Replacement cost: N/A - repair only

🟠 Check - book inspection urgently

Our recommendation:

Read the full HPFP failure guide

2. Chargepipe Failure - N55

Symptoms: Loss of boost, whistling noise from the engine bay, engine warning light, reduced power.

Typical mileage: 50,000–100,000 miles.

Repair cost: £300–£600 (chargepipe replacement with aftermarket metal unit)

Replacement cost: N/A - repair only

🟡 Monitor - book inspection soon

Our recommendation:

The N55's plastic chargepipe is prone to cracking, especially on tuned cars. The solution is an aftermarket metal chargepipe - fit once and forget. This is a straightforward fix for a known weak point.

Read the full chargepipe failure guide

3. Hybrid Battery & Electric Motor Issues

Symptoms: Reduced electric-only range, rapid battery depletion, drivetrain error messages, inability to hold charge, unusual whining from the transmission.

Typical mileage: 50,000–100,000 miles (or 5–8 years)

Repair cost: £3,000–£6,000 (battery replacement) / £1,500–£4,000 (electric motor/inverter)【PLACEHOLDER - confirm vs cost sheet】

Replacement cost: £5,000–£8,500 (complete powertrain)

🟡 Monitor - book inspection soon if symptoms appear

Our recommendation:

The ActiveHybrid 3's hybrid system uses a 1.3 kWh lithium-ion battery and an electric motor integrated into the transmission. Battery degradation and electric motor faults are the main concerns. The battery is the most expensive single component to replace. If your electric range has dropped significantly or you experience drivetrain errors, have the hybrid system inspected.

Read the full hybrid battery degradation guide

Weighing Your Options?

Compare Specialist Quotes When You're Ready

20+ vetted BMW specialists, every ActiveHybrid 3 era covered, with a 12-month warranty as standard.

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ActiveHybrid 3 - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

ActiveHybrid 3 - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseHPFP failure (N55)✅ Yes£600–£1,200Well-understood fix; cheaper than engine replacementChargepipe failure (N55)✅ Yes£300–£600Aftermarket metal unit solves permanentlyVANOS solenoid wear (N55)✅ Yes£200–£500Simple repair; part of routine maintenanceHybrid battery degradation⚠️ Sometimes£3,000–£6,000Often more cost-effective to replace the car - battery is the most expensive single componentElectric motor failure✅ Yes£1,500–£4,000Specialist repair available; cheaper than complete powertrain

Buying This ActiveHybrid 3? Check These First

Buy If

Full BMW service history with evidence of regular hybrid system checks
Documented HPFP and chargepipe history (or aftermarket metal chargepipe fitted)
Battery health report showing >80% capacity
No drivetrain warning lights or error codes

Avoid If

Drivetrain warning light with no diagnosis - could indicate expensive hybrid system faults
Significantly reduced electric range (battery degradation warning)
No service history - the N55 is reliable but the hybrid system demands proper maintenance
Unusual whining from the transmission (electric motor integration warning)

Closing Verdict

The ActiveHybrid 3 is a rare, fascinating car - the blend of BMW's brilliant N55 straight-six with an electric motor. It's the most powerful F30 3 Series before the M3, and a genuine future classic. But it's a complex, low-volume car - battery degradation, HPFP issues, and electric motor faults are the price of entry. Buy on documented history, not on faith. A well-maintained ActiveHybrid 3 is a £15,000–£25,000 future classic; a neglected one with a dying battery is a £5,000 gamble.

Don't guess.Get the right engine at the right price.

→ Compare ActiveHybrid 3 engine prices before you buy

Don't Guess. Compare.

Get real quotes from vetted UK specialists and make the right call for your 320d.

→ Compare ActiveHybrid 3 engine prices before you buy

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Thousands of 320d Owners Helped

Buying Checklist

Before you buy a used BMW ActiveHybrid 3 (or before you commit to an engine replacement), check these:

Battery Health

Ask for a battery health report; 70%+ capacity is BMW's warranty standard

Electric Range

Test the electric-only range; significant reduction indicates battery degradation

Cold Start

Listen for rattling or hesitation (HPFP or timing chain warning)

Service History

including the ActiveHybrid 3 era and confirmed oil-change intervals using BMW LL-01 approved oil

Chargepipe Check

Has the plastic chargepipe been replaced with an aftermarket metal unit?

Drivetrain Warning Light

Have codes been read? Any unresolved hybrid system issues?

Transmission Noise

Any whining or unusual noises? (electric motor integration warning)

MOT History

Check for emissions-related failures

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

BMW 320d Engine Codes

This table's rows match Section 1B's Era Map exactly.

N55B30A (3.0L Straight-Six Turbo) + 80 PS e-motor

Years2013–2019

Power340 PS (250 kW) system · 450 Nm torque

2025 Enquiries- (pattern data)

Avg. Recon Cost£5,000–£8,500 [PLACEHOLDER - confirm vs cost sheet]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

N55B30A (3.0L Straight-Six Turbo) + 80 PS e-motor2013–2019340 PS (250 kW) system · 450 Nm torque- (pattern data)£5,000–£8,500 [PLACEHOLDER - confirm vs cost sheet]

Technical Specs

N55B30A + e-motor

Displacement2,979 cc

CylindersStraight-6, 4 valves per cylinder

Compression Ratio10.2:1

Fuel SystemDirect injection (HPFP)

TurbochargerSingle twin-scroll turbocharger

Electric Motor80 PS (60 kW) · 250 Nm torque · Integrated into 8-speed Steptronic transmission

Battery1.3 kWh lithium-ion (gross)

→ Compare ActiveHybrid 3 engine prices for your BMW

Get quotes from trusted UK specialists in minutes.

Market Intelligence

Most Common Failure

HPFP failure

the N55's most notorious weak point; battery degradation also a significant concern

Average Enquiry Mileage

55,000

–85,000 miles

[PATTERN DATA]

Average Replacement Cost

£5,000

–£8,500 complete powertrain, supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

N55B30A

[PATTERN DATA]

Peak Enquiry Season

Winter

cold starts expose HPFP and battery issues【PATTERN DATA】

Regional Demand

London22%

South East18%

North West12%

PATTERN DATA

Regional Demand Breakdown

22%London

18%South East

12%North West

BMW 320d - Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty - always confirm terms with your chosen supplier.

Why UK BMW ActiveHybrid 3 Owners Trust BMWEngines.uk

Trusted ActiveHybrid 3 PHEV Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real ActiveHybrid 3 owners, as part of the Engine Finders network, with specialist experience in BMW's hybrid powertrains and high-voltage systems.
Compare ActiveHybrid 3 Engine & Powertrain Companies
see prices, warranty terms and supply & fit options side-by-side before you commit, across every F30 ActiveHybrid 3 that left the factory with the N55 and electric motor combination.
UK Engine & Hybrid Replacement Services for ActiveHybrid 3
supply-only or full supply & fit available nationwide, covering the N55 engine, electric motor, and complete PHEV powertrain - and we're vetted across every era of this badge.

Find the best BMW ActiveHybrid 3 engine or PHEV powertrain replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get your ActiveHybrid 3 back on the road with confidence.

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12-Month Warranty

As standard

Nationwide Delivery

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