How much does a BMW 4 Series 430d engine replacement cost in the UK-

A full BMW 430d engine replacement typically costs between £2,500 and £10,500 for the engine itself, depending on whether you choose used, reconditioned or rebuilt. Specialist fitting adds £780-£1,040 in labour. Used N57D30O1: £2,500-£4,500. Reconditioned B57D30O2: £5,000-£8,000. Rebuilt B57D30O2: £7,000-£10,500.

How long does a BMW 4 Series 430d engine replacement take-

A typical BMW 430d engine replacement takes 12-16 hours of workshop labour due to the straight-six layout. With parts sourcing and scheduling, allow 3-7 working days from order to completion. Supply-only: 2-4 working days for delivery. Supply & fit: 4-7 working days total.

How do I know if my BMW 430d has the N57 or B57 engine-

The engine change happened with the generation change in 2020. F32/F33/F36 (2013-2020) have the N57D30O1 (258hp). G22/G23/G26 (2020 onwards) have the B57D30O2 or B57D30B (286hp). The easiest way to check is by decoding your VIN. Pre-2020 models have the N57D30O1. 2020-onwards models have the B57D30O2 or B57D30B.

BMW 430d SPECIALISTS

BMW 4 Series 430d Engine Replacement Compare Prices & Get Quotes

Get instant quotes today from trusted UK BMW 4 Series 430d engine specialists. Compare prices on reconditioned, rebuilt and used engines for your 430d - whether you drive a Coupe, Convertible or Gran Coupe.

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BMW 4 Series 430d Engine

from£4,200 to £6,500

Usedfrom £2,800
Reconditionedfrom £5,000
Common codesN57D30O1, B57D30O2, B57D30B

BMW 4-series 430d Used Engine — N57D30O1

BMW 4-seriesUsed Engine — N57D30O1

BMW 4-series 430d Reconditioned Engine — N57D30O1

BMW 4-seriesReconditioned Engine — N57D30O1

BMW 4-series 430d Rebuilt Engine — N57D30O1

BMW 4-seriesRebuilt Engine — N57D30O1

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

BMW 4 Series 430d Engine History & Specs at a Glance

The BMW 430d launched as the performance diesel flagship of the first-generation 4 Series (F32/F33/F36) in 2013, powered by the smooth and torquey N57 straight-six turbo diesel. In 2020, the second-generation G22 430d received the newer B57 engine with mild-hybrid technology and a power increase to 286hp, cementing the 430d's reputation as the optimal blend of performance and efficiency in the 4 Series diesel line-up.

2013
N57D30O1, 3.0L straight-six turbo diesel, 258hp, launch of F32 430d Coupe
2014
F33 430d Convertible joins the range
2015
F36 430d Gran Coupe joins the range
2017
LCI facelift across F32/F33/F36; N57D30O1 continues with emissions updates
2020
G22 430d launched with B57D30O2, 3.0L straight-six turbo diesel, 286hp, mild-hybrid technology
2021
G23 430d Convertible and G26 430d Gran Coupe join the range
2024
G22 LCI facelift; B57D30B continues with 286hp and Euro 6e emissions compliance

Every engine fitted to the BMW 4 Series 430d is covered below, with UK rebuilt pricing and known failure points.

Compatible Engines

BMW 4 Series 430d Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

N57D30O1 — 3.0L Diesel Turbo (2013-2020)

Power Output: 258hp (190kW)
Years Fitted: 2013-2020 (F32/F33/F36)

Can’t find your exact engine code?-> Get quotes for N57D30O1 BMW 4 Series 430d engine replacement

-> Get quotes for N57D30O1 BMW 4 Series 430d engine replacement

Common Problems

BMW 4 Series 430d Engine Problems Repair Cost vs Replacement

The BMW 430d is widely regarded as one of the most desirable diesel engines in the 4 Series range, combining effortless torque with refined straight-six smoothness. The N57-powered cars (2013-2020) are generally robust but have known timing chain and turbocharger concerns, while the B57-powered cars (2020 onwards) are more reliable but not immune to DPF and oil leak issues. For 430d owners facing major engine failure, rebuilt engines through EnginesMarket include upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Timing Chain Stretch

Affected: BMW 4 Series 430d (N57D30O1, 2013-2020)
Typical failure mileage: 80,000-150,000 miles

Root cause

The N57's rear-mounted timing chain design - similar to the N47 - can stretch over time, particularly if oil changes are extended beyond BMW's recommended intervals. Chain stretch causes the cam timing to drift, leading to performance loss and, in severe cases, valve-to-piston contact.

Repair options

Repair tier	Dealer price	Specialist price
Preventative timing chain replacement	£2,500-£4,000	£1,500-£2,500
Full Replacement - rebuilt/reconditioned engine	£8,000-£12,000	£4,500-£9,000

Our recommendation

If you hear a rattling noise on cold start from your N57-powered 430d, act immediately - a £1,500-£2,500 preventative chain replacement is far cheaper than a £4,500+ engine replacement. Regular oil changes using the correct BMW Longlife spec are essential for chain longevity.

-> Compare rebuilt N57D30O1 BMW 4 Series 430d engine prices

Turbocharger & DPF Issues

Affected: BMW 4 Series 430d (N57D30O1 2013-2020, B57D30O2/B57D30B 2020-present)
Typical failure mileage: 80,000-150,000 miles (N57); 100,000+ miles (B57)

Root cause

On N57 engines, turbocharger wear (oil supply issues, worn bearings) is a known concern. On B57 engines, DPF clogging from short urban trips is the most common complaint, along with occasional turbocharger wastegate issues.

Repair options

Repair tier	Dealer price	Specialist price
DPF forced regeneration / cleaning	£400-£800	£250-£500
Turbocharger replacement	£2,500-£4,000	£1,200-£2,500
Full engine rebuild/replacement	£8,000-£12,000	£4,500-£10,500

Our recommendation

For N57-powered 430d owners, regular oil changes and allowing the turbo to cool after hard driving will extend turbo life. For B57 owners, ensure regular motorway driving to allow DPF regeneration - if the warning light appears, a forced regeneration (£250-£500) is far cheaper than a new DPF.

-> Compare rebuilt B57D30O2 BMW 4 Series 430d engine prices

Don't Let Engine Failure Write Off Your BMW 4 Series 430d

Every BMW 430d engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty - whether you choose a used, reconditioned or rebuilt unit. Our network of vetted UK specialists offers nationwide delivery and supply & fit options, often at 40-60% below main dealer pricing. Don't scrap your 430d over a failed engine - compare specialist quotes today.

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FAQ

BMW 4 Series 430d Engine ReplacementFrequently Asked Questions

Everything BMW 4 Series 430d owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

The N57 engine in pre-2020 430d models is known for timing chain stretch, typically between 80,000-150,000 miles. The B57 engine in 2020-onwards models is significantly more reliable in this regard. Rattling noise on cold start is the primary warning sign for N57 cars.

Preventative N57 chain replacement costs £1,500-£2,500 at a specialist
Ignoring the issue can lead to catastrophic engine failure costing £4,500+

-> Check your BMW 430d engine code now

For a 430d worth over £8,000, a reconditioned or rebuilt engine is a sound investment that can extend the car's life by 100,000+ miles. For cars under £6,000, a used engine with a preventative chain replacement before fitting is often the most cost-effective route. The 430d's straight-six diesel is highly regarded for its refinement and torque - replacement is often justified.

Always factor in fitting costs (£780-£1,040)
Every engine through EnginesMarket comes with a 12-month warranty

-> Compare BMW 430d engine options

Both are 3.0-litre straight-six diesels, but the 430d produces 258hp (or 286hp in the B57 generation) while the 435d produces 313hp from a twin-turbo setup. The 435d was replaced by the M440d in the G22 generation. The 430d offers a better balance of performance and fuel economy.

430d: 258-286hp, single or twin-turbo depending on generation
435d: 313hp, twin-turbo

-> Compare BMW 4 Series diesel options

Why Choose Us

Compare BMW 4 Series 430d Engine Prices Today

Comparing quotes for your BMW 4 Series 430d engine replacement is free, no-obligation, and specific to your exact engine code - whether you need a used N57, a reconditioned B57, or a fully rebuilt unit with warranty. Our network of vetted UK specialists offers transparent pricing, nationwide delivery, and supply & fit options to get your 430d back on the road with minimum hassle.

800+800+ 430d engines supplied through our network

12-Month12-Month Warranty on every rebuilt 430d engine

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Compare quotes from trusted UK BMW 4 Series 430d engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.