How much does a BMW X7 xDrive30d engine replacement cost in the UK?

A reconditioned X7 xDrive30d (B57) engine typically costs £4,000–£6,500 supply only. Fitting adds £2,000–£3,500 depending on location and workshop rates. A blown engine in a premium BMW can cost £9,000–£13,000. Main dealer new engines start from £9,000–£13,000+ supply only. Use our calculator for a figure specific to your car.

What are the common problems with the BMW X7 xDrive30d?

The main known issues are: (1) EGR cooler coolant leaks - the most prevalent problem, subject to global BMW recalls affecting diesel vehicles 2010–2022, (2) Timing chain stretch - 'exceedingly rare' on B57 but documented in high-mileage or poorly serviced examples, (3) DPF clogging - particularly on vehicles used for short urban journeys, and (4) Oil leaks from valve cover gaskets and oil filter housing.

Is it worth replacing a BMW X7 xDrive30d engine, or should I scrap the car?

Depends on vehicle value and condition. Against a well-kept £25,000–£45,000 X7, a £4,500–£6,500 recon is 10–25% of the car's value - worth it given the X7's strong retained values. The B57's robust reliability means that with proper maintenance, these engines can achieve very high mileages.

How do I find my BMW X7 xDrive30d engine code?

The X7 xDrive30d uses the B57D30O0 (also known as B57D30A) - a 3.0-litre single-turbo inline-six diesel producing 265 hp and 620 Nm of torque. The engine code is stamped on the cylinder block. Tell us your registration and we'll confirm it for free.

BMW X7 xDrive30d2018–present1 Engine Generation

BMW X7 xDrive30d Engine Replacement — Compare Prices & Get Quotes

Name: BMW X7 xDrive30d UK Engine Enquiry Data 2025
Creator: BMWEngines.uk

Get quotes today from trusted UK BMW X7 specialists. The 3.0-litre B57 single-turbo inline-six diesel is BMW's most popular engine for the full-size luxury SUV - compare reconditioned, rebuilt and used engines with supply & fit available nationwide.

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BMW X7 xDrive30d Engines - from £1,500 to £13,000Engine code: B57D30O0 (B57D30A)

BMW X7 xDrive30d Engines - from £1,500 to £13,000· Engine code: B57D30O0 (B57D30A)

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BMW X7 xDrive30d - Which Engine Does Your Car Actually Have?

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

Era Note

3.0L single-turbo inline-six diesel - 265 hp, 620 Nm. B57 family, timing chain issues "exceedingly rare"

GenerationYearsEngine CodeReliabilityRecon CostEra Note

G07

2018–presentB57D30O0 (B57D30A)★★★★☆ [NEWLY ASSIGNED - see Data Note]£4,000–£6,500 [PLACEHOLDER]3.0L single-turbo inline-six diesel - 265 hp, 620 Nm. B57 family, timing chain issues "exceedingly rare"

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW X7 xDrive30d Engine Replacement Costs

Supply Only£4,000–£6,500

Fitted (Indie)£6,000–£8,500

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,500–£3,500£2,500–£5,0001–6 monthsBudget priority; lower-mileage donor

Reconditioned Engine£4,000–£6,500£6,000–£8,50012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£5,000–£8,500£7,000–£10,50012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£9,000–£13,000+£11,000–£15,000+24–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting an X7 xDrive30d engine typically takes 14–18 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). The X7's size and complex emissions systems add labour time.

→ Compare X7 xDrive30d engine prices from UK specialists

Common Problems With BMW 320d Engines

1. EGR Cooler Coolant Leak (Global Recall)

Symptoms: White exhaust smoke, rough idling, coolant loss with no visible external leak, burning smell from engine bay, engine warning light, reduction in engine power

Typical mileage: Any mileage - a manufacturing defect affects multiple BMW diesel models 2010–2022

Repair cost: £0 (free under recall) / £600–£1,200 (out of warranty - EGR cooler replacement)

Replacement cost: N/A - repair only (does not progress to engine replacement if addressed)

🟠 Check - verify recall completion status immediately; coolant loss can cause serious engine damage and, in extreme cases, fire risk

Our recommendation:

The EGR cooler is one of the most prevalent problems with the B57 engine. A manufacturing defect can cause the EGR cooler to develop an internal coolant leak. The leaking coolant and recirculated exhaust gas may combine, potentially reducing engine power and creating a fire risk. BMW has issued multiple recalls affecting diesel vehicles globally over EGR cooler faults. Verify recall completion before buying any X7 xDrive30d - this is a free fix at the dealership.

Read the full EGR cooler failure guide

1. EGR Cooler Coolant Leak (Global Recall)

Symptoms: White exhaust smoke, rough idling, coolant loss with no visible external leak, burning smell from engine bay, engine warning light, reduction in engine power

Typical mileage: Any mileage - a manufacturing defect affects multiple BMW diesel models 2010–2022

Repair cost: £0 (free under recall) / £600–£1,200 (out of warranty - EGR cooler replacement)

Replacement cost: N/A - repair only (does not progress to engine replacement if addressed)

🟠 Check - verify recall completion status immediately; coolant loss can cause serious engine damage and, in extreme cases, fire risk

Our recommendation:

Read the full EGR cooler failure guide

2. Timing Chain Stretch (High-Mileage or Poorly Serviced Engines)

Symptoms: Rattling or slapping noise from the engine on cold start, metallic ticking, reduced power, rough idling, engine misfires

Typical mileage: 100,000+ miles - "exceedingly rare" on well-maintained B57 engines, but can occur in high-mileage or poorly serviced examples

Repair cost: £1,500–£3,500 (chain kit, tensioners and guides) - a complete timing chain replacement can cost £8,000–£12,000

Replacement cost: £5,000–£10,000 (if chain snaps - full engine replacement)

🔴 Immediate - if you hear rattle on cold start, book an inspection today

Our recommendation:

Unlike the infamous N47 diesel, the B57's timing chain is "notably robust and reliable" and issues such as timing chain stretch and guide failures are "exceedingly rare". However, in high-mileage or poorly serviced engines, timing chain stretch can still occur. BMW claims the timing chain is a "lifetime part" and does not service it, but regular oil changes and early attention to warning signs like rattling noises can help prevent costly engine damage. At the first sign of cold-start rattle, get the chain inspected immediately.

Read the full timing chain failure guide → /failures/b57-timing-chain/ [NEW FAILURE PAGE NEEDED]

3. DPF Clogging & Regeneration Issues

Symptoms: DPF warning light, loss of power, black smoke on acceleration, increased fuel consumption, "Drivetrain" warning message

Typical mileage: Any mileage - short urban journeys accelerate the issue; a 2021 X7 diesel with only 11,339 km experienced DPF failure

Repair cost: £300–£800 (forced DPF regeneration / sensor replacement) / £1,000–£2,500 (DPF replacement)

Replacement cost: N/A - repair only (does not progress to engine replacement if addressed)

🟡 Monitor - book inspection if warning appears

Our recommendation:

A 2021 BMW X7 diesel experienced power loss and emitted black smoke, with a DPF warning light indicating a failure to regenerate. The suspected cause was a faulty exhaust back pressure sensor, which can prevent proper DPF regeneration. Replacing the sensor and performing a forced DPF regeneration resolved the issue. If you primarily drive short distances, factor in regular motorway runs to allow passive DPF regenerations. If the warning appears, have the sensor and DPF system inspected.

Read the full DPF clogging guide

4. Oil Leaks (Valve Cover & Oil Filter Housing Gaskets)

Symptoms: Burning oil smell from engine bay, visible oil residue around the valve cover or oil filter housing, oil spots under the car, low oil level warning

Typical mileage: 60,000–100,000 miles - gaskets age and harden

Repair cost: £400–£1,200 (gasket replacement - valve cover or oil filter housing)

Replacement cost: N/A - repair only (does not progress to engine replacement if addressed)

🟡 Monitor - book inspection if you notice oil spots or burning smell

Our recommendation:

Valve cover gaskets and oil filter housing gaskets are known leak points on both petrol and diesel X7 models. Because the X7 engine sits deep within the bay, small leaks can be hard to spot until smells or smoke appear. If you notice a burning smell or oil spots, have the gaskets inspected promptly. Catching leaks early prevents oil contamination of other components and more serious engine damage.

Read the full oil leak guide → /failures/b57-oil-leaks/ [NEW FAILURE PAGE NEEDED]

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X7 xDrive30d - 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.

X7 xDrive30d - 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 SenseEGR cooler coolant leak✅ Yes£0 (recall) / £600–£1,200Free under recall; straightforward replacement out of warrantyTiming chain rattle (early detection)✅ Yes£1,500–£3,500Preventative - catches the fault before catastrophic failureTiming chain snapped❌ Usually NoEngine replacementPiston-valve contact means full replacement requiredDPF clogging / sensor failure✅ Yes£300–£800Sensor replacement + forced regeneration - straightforward fixOil leaks (gaskets)✅ Yes£400–£1,200Catch early to prevent oil contamination and engine damage

Buying This X7 xDrive30d? Check These First

Buy If

Full service history with BMW-approved oil changes (BMW Longlife-04 spec)
Confirmed EGR recall completion - this affects BMW diesel engines globally
Evidence of regular motorway use (DPF health)
Remaining manufacturer warranty - these are complex luxury vehicles

Avoid If

Cold-start rattle - this is a warning sign of timing chain tensioner wear (rare but documented)
No proof of EGR recall work - this is a free fix; lack of it suggests neglect
DPF warning lights or "Drivetrain" messages
Poor service history - the B57 is reliable but needs proper maintenance

Closing Verdict

The X7 xDrive30d's B57 engine is one of BMW's finest modern diesels - a 3.0-litre single-turbo inline-six with 265 hp and 620 Nm that delivers effortless performance for a full-size luxury SUV. The B57 is "celebrated for its robust performance, impressive efficiency, and excellent reliability". Unlike the N47 and early N57 engines, timing chain issues are "exceedingly rare". However, EGR cooler recalls, DPF sensitivity, carbon buildup, and oil leaks are well-documented issues. Buy with full service history, confirmed recall work, and evidence of regular long-distance driving - and you'll have one of the most refined and capable luxury SUVs on the road.

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

→ Compare X7 xDrive30d 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 X7 xDrive30d engine prices before you buy

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Buying Checklist

Before you buy a used BMW X7 xDrive30d (or before you commit to an engine replacement), check these:

Cold Start

Listen for rattling or slapping noise from the engine (timing chain warning)

EGR Recall

Verify EGR cooler recall completion - this is critical and affects BMW diesel engines globally

DPF Health

Check for DPF warning lights; short journeys are a red flag

Service History

Including the B57 engine and confirmed BMW-approved oil changes

Coolant Level

Check for frequent top-ups; inspect for EGR cooler leaks

Oil Leaks

Look for oil residue around the valve cover and oil filter housing

Engine Warning Light

Have codes been read? Look for EGR, DPF, or timing-related codes

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.

B57D30O0 (B57D30A)

Years2018–present

Power265 hp (195 kW) / 620 Nm

2025 Enquiries- (pattern data)

Avg. Recon Cost£4,000–£6,500【PLACEHOLDER】

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

B57D30O0 (B57D30A)2018–present265 hp (195 kW) / 620 Nm- (pattern data)£4,000–£6,500【PLACEHOLDER】

Technical Specs

B57D30O0

Displacement2,993 cc (3.0L)

Cylinders6-cylinder inline

Bore84 mm / Stroke: 90 mm

Compression Ratio16.5:1

ValvetrainDOHC, 4 valves per cylinder, chain-driven

Fuel SystemCommon-rail direct injection

TurbochargerSingle turbo with variable geometry

Power195 kW (265 hp) @ 4,000 rpm

Torque620 Nm @ 2,000–2,500 rpm

0-62 mph7.0 seconds

Top Speed141 mph (227 km/h)

Fuel Economy8.4 l/100 km (33.6 mpg) combined

→ Compare X7 xDrive30d engine prices for your BMW

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Market Intelligence

Most Common Failure

EGR cooler coolant leaks

subject to global BMW recalls affecting diesel engines 2010–2022

Average Enquiry Mileage

30,000

–60,000 miles【PATTERN DATA】

Average Replacement Cost

£4,500

–£5,500 reconditioned, supply only【PLACEHOLDER】

Most Requested Engine Code

B57D30O0 (B57D30A)【PATTERN DATA】

Peak Enquiry Season

Winter

cold starts expose timing chain and DPF issues【PATTERN DATA】

Regional Demand

London22%

South East18%

North West (12%)【PATTERN DATA】

Regional Demand Breakdown

22%London

18%South East

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.

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