BMW 4 Series 435i Engine ReplacementCompare Prices & Get Quotes
Need a replacement engine for your BMW 4 Series 435i- Get quotes today from trusted UK BMW 435i engine specialists and compare prices on reconditioned, rebuilt and used engines for your 435i Coupe, Gran Coupe or Convertible.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £2,500 to £7,500
Used from £2,500 · Reconditioned from £4,500 · Common codes: N55B30A, N55B30M0
From £2,500
Tested, bare/short engine
From £4,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best BMW 4 Series 435i Replacement Engineto Finding the Best BMW 4 Series 435i Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 4 Series 435i - Engine History & Specs at a Glance
The BMW 435i joined the 4 Series range at launch in 2013 as the range-topping petrol model, offering a smooth and powerful inline-six turbocharged experience. The 435i was powered exclusively by BMW's N55 engine throughout its production run, delivering 306hp and 400Nm of torque.
Variant HistoryBMW 4 Series 435i - Engine History & Specs at a Glance
The BMW 435i joined the 4 Series range at launch in 2013 as the range-topping petrol model, offering a smooth and powerful inline-six turbocharged experience. The 435i was powered exclusively by BMW's N55 engine throughout its production run, delivering 306hp and 400Nm of torque.
BMW 4 Series 435i
Fuel TypePetrol
Engine Size3.0L (2979cc) consistent across all production
Power Output306hp (225kW) @ 5,800rpmEngine History Timeline
N55B30A 3.0-litre turbocharged inline-six, 306hp - original 435i engine for F32/F33/F36 chassis
N55B30M0 3.0-litre turbocharged inline-six, 306hp - revised variant with updated engine management calibration
Production of the 435i ends replaced by the 440i with the B58 engine as part of the Life Cycle Impulse (LCI) update
Key Specs Snapshot
Fuel TypePetrolEngine Size3.0L (2979cc) consistent across all productionPower Output306hp (225kW) @ 5,800rpmTorque400Nm @ 1,200-5,000rpmYears Produced2013-2016Every engine fitted to the BMW 4 Series 435i is covered below, with UK rebuilt pricing and known failure points.
BMW 4 Series 435i Engine Codes - Specifications & Replacement CostBMW 4 Series 435i Engine Codes - Specifications & Replacement Cost
3.0L Petrol (2013-2014)
Power Output306hp (225kW) @ 5,800rpmYears Fitted2013-2014
Compatible Trim Levels
- 435i
- 435i M Sport
- 435i Luxury
- 435i xDrive (four-wheel drive adds ~1hr to fitting labour)
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,500-£4,500 [THIRD-PARTY]
Reconditioned
Addressed known issues, tested
£4,500-£7,000 [THIRD-PARTY]
Rebuilt
Full teardown, upgraded internals
£6,000-£9,000 [THIRD-PARTY]
Common Failure
Charge pipe cracking (plastic OEM pipe becomes brittle from heat cycles), water pump failure, and oil leaks from various gaskets. Typical failure mileage: 60k-100k.
The BMW 435i is powered exclusively by the N55 3.0-litre turbocharged inline-six - a generally robust engine but one with several well-documented weak points. The most common failures are charge pipe cracking, water pump failure, and oil leaks from various gaskets. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the BMW 4 Series 435i N55 Engine Fails
Affected Vehicles
BMW 4 Series 435i (N55B30A / N55B30M0, 2013-2016)
Typical Failure Mileage
60k-100k
Root Cause
The factory charge pipe is made of plastic which becomes brittle and weak after repeated heat cycles, eventually cracking under boost pressure. This causes boost leaks, loss of power, and can trigger the engine management light.
Why It Happens
The factory charge pipe is made of plastic which becomes brittle and weak after repeated heat cycles, eventually cracking under boost pressure. This causes boost leaks, loss of power, and can trigger the engine management light.
Dealer (parts + labour)
£400-£700
Specialist (parts + labour)
£300-£500
What it involves
Replacement with OEM-spec plastic pipe
Suitability
Budget option; risk of repeat failure
1 - 2 daysDealer (parts + labour)
£500-£800
Specialist (parts + labour)
£400-£600
What it involves
Replacement with aftermarket aluminium charge pipe
Suitability
Best long-term fix; eliminates plastic weakness
1 - 2 daysDealer (parts + labour)
£6,000-£10,000
Specialist (parts + labour)
£6,000-£9,000
What it involves
Supply & fit, upgraded components, 12-month warranty
Suitability
If charge pipe failure has caused secondary 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 |
|---|---|---|---|---|---|
 Charge pipe replacement (OEM plastic) Minor | £400-£700 | £300-£500 | Replacement with OEM-spec plastic pipe | Budget option; risk of repeat failure | 1 - 2 days |
 Charge pipe replacement (upgraded aluminium) Best Value | £500-£800 | £400-£600 | Replacement with aftermarket aluminium charge pipe | Best long-term fix; eliminates plastic weakness | 1 - 2 days |
Full Replacement - rebuilt/reconditioned engine Best Value | £6,000-£10,000 | £6,000-£9,000 | Supply & fit, upgraded components, 12-month warranty | If charge pipe failure has caused secondary damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 2013-2016 BMW 435i is worth approximately £8,000-£22,000 depending on mileage and condition. For cars worth over £10,000, a reconditioned or rebuilt engine usually justifies the premium via warranty and reliability. The charge pipe repair itself is well within the vehicle's value on all but the very lowest-value examples.
Our Recommendation
Our Recommendation
If you're experiencing loss of power or a check engine light, have the charge pipe inspected immediately. Upgrading to an aluminium charge pipe is a cost-effective preventative measure that eliminates the known weak point.
Don't Let Engine Failure Write Off Your BMW 4 Series 435i
The N55 is a generally robust engine, but its known weak points - charge pipe, water pump, and oil leaks - can escalate quickly if ignored. A rebuilt engine through EnginesMarket comes with upgraded components addressing these failure points, a minimum 12-month warranty, and nationwide delivery or supply & fit options - often at a fraction of main dealer prices.
Compare rebuilt N55B30A BMW 4 Series 435i 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 4 Series 435i. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 4 Series 435i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 4 Series 435i engine replacement cost in the UK-
A replacement engine for a BMW 435i typically costs between £2,500 and £9,000 depending on condition. Used N55B30A units start from around £2,500, while reconditioned units range from £4,500 to £7,000. Rebuilt engines with warranty sit at £6,000-£9,000. Specialist fitting adds approximately £780-£1,040 in labour.
- Used: £2,500-£4,500
- Reconditioned: £4,500-£7,000
- Rebuilt: £6,000-£9,000
Question 2What are the common problems with the BMW 4 Series 435i N55 engine-
The N55 engine in the 435i has several well-documented issues. The most common are charge pipe cracking (plastic pipe becomes brittle), electric water pump failure, oil leaks from the valve cover and oil filter housing gaskets, and VANOS solenoid issues. Carbon buildup on intake valves is also common due to the direct injection system.
- Charge pipe: upgrade to aluminium for a permanent fix
- Water pump: replace proactively at 60k miles
- Oil leaks: replace gaskets promptly
Question 3Is it worth replacing the engine in a BMW 4 Series 435i-
A 2013-2016 BMW 435i is typically worth £8,000-£22,000 depending on condition and mileage. If your car is worth over £10,000, a reconditioned or rebuilt engine with warranty is a sound investment - especially if you plan to keep the car for 2+ years. For lower-value examples, a used engine may be more cost-effective.
-> Compare 435i engine pricesQuestion 4How long does a BMW 4 Series 435i engine replacement take-
Supply-only engines are typically dispatched within 1-2 working days. Full supply & fit through a specialist workshop usually takes 2-3 days, depending on workshop availability and the complexity of the specific 435i variant (xDrive models may take slightly longer).
-> Find a BMW 435i specialistQuestion 5What's the difference between the BMW 435i and 440i engine-
The 435i uses the N55 3.0-litre inline-six turbo (306hp). The 440i uses the newer B58 3.0-litre inline-six turbo (326hp) which replaced the N55 in 2016 as part of the LCI update. The B58 is generally considered more reliable and more powerful, with fewer known issues.
-> Get the right engine for your 435iQuestion 6Can I replace my N55 engine with a B58 in my BMW 435i-
While both are 3.0-litre inline-six engines, the B58 is not a direct bolt-in replacement for the N55. It requires different engine mounts, wiring looms, ECUs, and cooling systems. It is not a cost-effective or practical swap. Stick with an N55 replacement for your 435i.
-> Verify your 435i engine compatibilityWhy Choose UsCompare BMW 4 Series 435iEngine PricesToday
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