BMW 4 Series 430d Engine ReplacementCompare 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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12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £4,200 to £6,500
Used from £2,800 · Reconditioned from £5,000 · Common codes: N57D30O1, B57D30O2, B57D30B
From £2,800
Tested, bare/short engine
From £5,000
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 430d Replacement Engineto Finding the Best BMW 4 Series 430d Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 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.
Variant HistoryBMW 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.
BMW 4 Series 430d
Fuel TypeDiesel (with mild-hybrid on later models)
Engine Size Range3.0L (2993cc)
Power Output Range258-286hp across the variant's historyEngine History Timeline
N57D30O1 3.0L straight-six turbo diesel, 258hp, launch of F32 430d Coupe
F33 430d Convertible joins the range
F36 430d Gran Coupe joins the range
LCI facelift across F32/F33/F36; N57D30O1 continues with emissions updates
G22 430d launched with B57D30O2 3.0L straight-six turbo diesel, 286hp, mild-hybrid technology
G23 430d Convertible and G26 430d Gran Coupe join the range
G22 LCI facelift; B57D30B continues with 286hp and Euro 6e emissions compliance
Key Specs Snapshot
Fuel TypeDiesel (with mild-hybrid on later models)Engine Size Range3.0L (2993cc)Power Output Range258-286hp across the variant's historyYears Produced2013-presentEvery engine fitted to the BMW 4 Series 430d is covered below, with UK rebuilt pricing and known failure points.
BMW 4 Series 430d Engine Codes - Specifications & Replacement CostBMW 4 Series 430d Engine Codes - Specifications & Replacement Cost
3.0L Diesel Turbo (2013-2020)
Power Output258hp (190kW)Years Fitted2013-2020 (F32/F33/F36)
Compatible Trim Levels
- 430d SE
- 430d Sport
- 430d M Sport
- 430d Luxury
- 430d xDrive
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,500-£4,500
Reconditioned
Addressed known issues, tested
£4,500-£7,000
Rebuilt
Full teardown, upgraded internals
£6,000-£9,000
Common Failure
Timing chain stretch - the N57 shares the rear-mounted chain design of the N47, making access labour-intensive. Chain stretch can lead to performance loss and, if ignored, valve-to-piston contact. Typical failure mileage: 80,000-150,000 miles. Also reported: turbocharger wear and oil pump failure.
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.
Why the BMW 4 Series 430d N57 Engine Needs Attention
Affected Vehicles
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.
Why It Happens
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.
Dealer (parts + labour)
£2,500-£4,000
Specialist (parts + labour)
£1,500-£2,500
What it involves
Replace chain, guides, tensioner; access requires dropping gearbox (rear-mounted chain)
Suitability
Best value if caught early - prevents catastrophic failure
1 - 2 daysDealer (parts + labour)
£8,000-£12,000
Specialist (parts + labour)
£4,500-£9,000
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty
Suitability
If chain has snapped or engine is damaged
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 |
|---|---|---|---|---|---|
 Preventative timing chain replacement Minor | £2,500-£4,000 | £1,500-£2,500 | Replace chain, guides, tensioner; access requires dropping gearbox (rear-mounted chain) | Best value if caught early - prevents catastrophic failure | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £8,000-£12,000 | £4,500-£9,000 | Supply & fit, upgraded components addressing the original failure point, 12-month warranty | If chain has snapped or engine is damaged | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
Apply this UK-wide decision framework to your BMW 4 Series 430d: - Vehicle worth under ~£5,000: a used engine or preventative chain replacement typically makes more sense than a full rebuilt unit. - Vehicle worth ~£5,000-£8,000: evaluate both; reconditioned is viable if keeping the car 2+ years. - Vehicle worth ~£8,000-£15,000: reconditioned/rebuilt usually justifies the premium via warranty and reliability. - Vehicle worth £15,000+: replacement cost is typically small relative to vehicle value.
Our Recommendation
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.
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.
Compare rebuilt N57D30O1 BMW 4 Series 430d 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 430d. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 4 Series 430d Engine ReplacementFrequently Asked Questions
Question 1How 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
Question 2Does the BMW 4 Series 430d have timing chain problems-
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+
Question 3Is it worth replacing the engine in a BMW 4 Series 430d-
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
Question 4What is the difference between the BMW 430d and 435d engines-
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
Question 5How 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
Question 6How 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
Why Choose UsCompare BMW 4 Series 430dEngine PricesToday
800+ 430d engines supplied through our network
12-Month Warranty on every rebuilt 430d engine
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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.
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