How much does a Mercedes GLE 63 AMG engine replacement cost in the UK?

A reconditioned M157 V8 typically costs £6,500–£10,500 supply only, with the M177 V8 higher at £7,500–£12,000. A used M157 engine costs on average £10,521; new or reconditioned units can reach £13,607. Fitting adds £1,500–£2,500. A full engine replacement can cost £9,000–£13,000. Use our calculator for a figure specific to your GLE.

Is the Mercedes GLE 63 AMG engine reliable?

It depends which generation your GLE is. The W166's M157 (2015–2019) has known weaknesses — cylinder scoring, valve stem seal wear, oil leaks and thermostat issues. The V167's M177 (2020–present) is more reliable but still has oil separator failure leading to rear main seal leaks, as well as software glitches and cooling system issues. Both engines demand regular maintenance. Check the Era Map above for your specific car.

What are the common problems with the GLE 63 AMG engine?

M157 (W166/C292): cylinder scoring, valve stem seal wear (blue smoke on startup), oil leaks, timing chain tensioner wear, and thermostat issues. M177 (V167): oil separator failure → rear main seal leaks, software glitches, and cooling system/thermostat issues. Both engines are sensitive to maintenance neglect.

Is it worth replacing a GLE 63 AMG engine, or should I scrap the car?

Depends on vehicle value and generation. A W166 GLE 63 AMG is a £15,000–£35,000 vehicle — a £7,000–£9,000 recon is 20–60% of the car's value. A V167 GLE 63 AMG is a £40,000–£80,000+ vehicle — a £9,000–£11,000 recon is 11–28% of the car's value, making replacement a clear decision. Evaluate carefully based on your car's generation and condition.

How do I find my Mercedes GLE 63 AMG engine code?

Listed on the VIN plate and vehicle documentation. The GLE 63 AMG covers M157 (W166/C292, 2015–2019) and M177 (V167, 2020+). Tell us your registration date and we'll confirm which one you have for free.

Can I prevent the common failures on a GLE 63 AMG?

On M157: regular oil changes with Mercedes‑approved oil and shortened intervals (5,000–7,500 miles) are essential. Listen for blue smoke on startup — this indicates valve stem seal wear. On M177: have the oil separator inspected at 40,000–60,000 miles — replacing it early prevents expensive rear main seal leaks. Both engines: monitor coolant levels and temperature — replace thermostats preventatively. At the first sign of blue smoke, oil leaks, temperature fluctuations or rough running, book an inspection immediately.

Mercedes GLE 63 AMG2015–presentM157 / M177

Mercedes GLE 63 AMG Engine Replacement — Compare Prices & Get Quotes

The GLE 63 AMG is the performance flagship of the GLE range — the W166's M157 5.5‑litre twin‑turbo V8 and the V167's M177 4.0‑litre twin‑turbo V8 with mild‑hybrid assistance. Get quotes from trusted UK specialists today.

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Mercedes GLE 63 AMG Engines — from £3,500 to £13,500M157 / M177

Mercedes GLE 63 AMG Engines — from £3,500 to £13,500· M157 / M177

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The GLE 63 AMG THROUGH TIME — Era Map

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

GenerationYearsEngine CodeReliabilityRecon CostEra Note

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

Mercedes GLE 63 AMG Engine Replacement Costs

Supply Only£6,500–£10,500

Fitted (Indie)£8,000–£12,300

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£3,500–£5,500£4,900–£7,3001–6 monthsBudget priority; lower‑mileage donor

Reconditioned Engine£6,500–£10,500£8,000–£12,30012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£8,000–£13,500£9,500–£15,50012–24 monthsLong‑term ownership; 3+ year horizon

Main Dealer New£12,000–£18,000£13,800–£20,50024–36 monthsInsurance jobs, warranty claims

Figures above reflect the range across both generations; specific costs vary by era — see the Era Map above. A replacement M157 engine (type 157.982) costs on average £10,521 in good condition, with new or reconditioned units up to £13,607. A full engine replacement for a GLE 63 AMG can cost £9,000–£13,000.

Labour estimate: Fitting a GLE 63 AMG engine typically takes 16–22 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). The twin‑turbo V8's hot‑vee layout requires significant disassembly; some M157 turbo replacements require the engine to be removed.

→ Compare GLE 63 AMG engine prices from UK specialists

Common Problems

1. Cylinder Scoring / Valve Stem Seal Wear (M157 — W166/C292, 2015–2019)

Symptoms: Blue smoke on startup, increased oil consumption (1L per 1,000+ miles), rough idle, misfires, loss of compression.

Typical mileage: 60,000–100,000 miles

Repair cost: £3,000–£8,000 (valve stem seal replacement, cylinder bore remediation)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: £6,500–£10,500 (full engine replacement if scoring is extensive)

🔴 Immediate - if you see blue smoke or experience misfires, book an inspection today

Our recommendation:

Cylinder scoring and valve stem seal wear are the most serious issues on the M157. If left unaddressed, cylinder scoring can require a full engine replacement. A bore‑scope inspection is the only way to confirm cylinder condition. Valve seal leaks are a known issue. If you notice blue smoke on startup or increasing oil consumption, have the engine inspected immediately. Regular oil changes with Mercedes‑approved oil are essential.

1. Cylinder Scoring / Valve Stem Seal Wear (M157 — W166/C292, 2015–2019)

Symptoms: Blue smoke on startup, increased oil consumption (1L per 1,000+ miles), rough idle, misfires, loss of compression.

Typical mileage: 60,000–100,000 miles

Repair cost: £3,000–£8,000 (valve stem seal replacement, cylinder bore remediation)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: £6,500–£10,500 (full engine replacement if scoring is extensive)

🔴 Immediate - if you see blue smoke or experience misfires, book an inspection today

Our recommendation:

2. Oil Separator Failure → Rear Main Seal Leak (M177 — V167, 2020–present)

Symptoms: Oil spots under the vehicle, burning oil smell, oil residue on the engine, low oil pressure warning, oil consumption.

Typical mileage: 40,000–80,000 miles

Repair cost: £1,200–£3,500 (oil separator replacement, rear main seal)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: £7,500–£12,000 (full engine replacement if oil starvation causes damage)

🟠 Check - book inspection urgently if you notice oil spots or burning smell

Our recommendation:

The M177's oil separator is a known weak point — if it fails, it can cause excessive crankcase pressure, leading to rear main seal (RMS) leaks. Mercedes has issued technical guidance indicating that when diagnosing oil leaks from the rear main seal area on the M177 platform, the crankcase ventilation system and oil separators must be inspected. If you notice oil spots or a burning smell, have the engine inspected immediately — addressing the oil separator early prevents expensive RMS replacement.

3. Cooling System & Thermostat Issues (M157 & M177)

Symptoms: Temperature fluctuations, slow warm-up, loud cooling fan, engine warning light, overheating.

Typical mileage: 40,000–80,000 miles

Repair cost: £400–£1,200 (thermostat, water pump, coolant hoses)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: N/A — repair only (if caught before overheating)

🟡 Monitor - book inspection soon

Our recommendation:

Both M157 and M177 engines suffer from cooling system issues. On the M157, a sticking thermostat can cause temperature fluctuations and poor cold‑start performance. On the M177, the sealing ring in the engine thermostat can detach, causing a delay in engine coolant heating and illuminating the check engine light. If you notice temperature fluctuations or a loud cooling fan, have the cooling system inspected.

Weighing Your Options?

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GLE 63 AMG — 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.

GLE 63 AMG — 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 SenseCylinder scoring / valve seal wear (M157)⚠️ Sometimes£3,000–£8,000Often requires full rebuild; assess overall engine healthOil separator / RMS leak (M177)✅ Yes£1,200–£3,500Replace oil separator early — prevents expensive RMS failureCooling system / thermostat issues✅ Yes£400–£1,200Routine maintenance — do preventativelyTurbocharger failure✅ Yes£2,000–£5,000Engine‑out job; cheaper than collateral damageSevere engine damage (scoring / oil starvation)❌ Usually NoEngine replacementLittle left to salvage — replacement is the only option

Buying This GLE 63 AMG? Check These First

Buy If

M157 (W166/C292): no blue smoke on startup — valve seals and cylinders in good condition
M177 (V167): no oil leaks — oil separator and rear main seal in good condition
Cooling system maintained — thermostat, water pump and hoses in good condition
Full Mercedes‑AMG service history with regular oil changes

Avoid If

M157: blue smoke on startup — valve stem seals or cylinder scoring likely — walk away
M157: misfires or rough running — potential cylinder scoring
M177: oil spots under the vehicle — oil separator or rear main seal may be failing
Poor service history — AMG V8s are sensitive to neglect

Closing Verdict

The GLE 63 AMG is the performance flagship of the GLE range — a 557–612 hp twin‑turbo V8 with genuine supercar‑rivalling performance. The W166's M157 is the more affordable entry point but has cylinder scoring and valve seal weaknesses. The V167's M177 is more modern and reliable but has oil separator and rear main seal watchpoints. Buy on full service history, check for blue smoke on startup (M157) and oil leaks (M177), and never ignore a warning light. A well‑maintained GLE 63 AMG is a thrilling, long‑lived performance SUV; a neglected one is a £10,000+ bill waiting to happen.

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

→ Compare GLE 63 AMG engine prices before you buy

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Buying Checklist

Before you buy a used Mercedes GLE 63 AMG (or before you commit to an engine replacement), check these:

Cold Start — Listen for smooth start; check for blue smoke (M157 valve seals)

Oil Leaks (M177) — Check under the car and around the engine; oil separator / RMS leaks

Misfires / Rough Idle — Check for uneven running; cylinder scoring (M157) or software issues (M177)

Service History — including which generation (W166/C292 or V167) and confirmed oil‑change intervals

Cooling System — Check for temperature fluctuations; thermostat issues on both engines

Turbo Health — Listen for whistling or whining; turbo failure indicator (engine‑out job)

Oil Consumption — Does it use more than 1L per 1,000 miles? Valve seal or cylinder indicator

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.

Engine Codes

This table's rows match Section 1B's Era Map exactly. M177 power figures from Mercedes‑Benz official sources; M157 power figures from Car and Driver.

M157 (5.5 V8 twin‑turbo)

Years2015–2019

Power557–577 hp (410–425 kW) @ 5,500 rpm; 700–760 Nm

2025 Enquiries— (pattern data)

Avg. Recon Cost£6,500–£10,500【PLACEHOLDER】

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

M157 (5.5 V8 twin‑turbo)2015–2019557–577 hp (410–425 kW) @ 5,500 rpm; 700–760 Nm— (pattern data)£6,500–£10,500【PLACEHOLDER】

M177 (4.0 V8 twin‑turbo, 48V MHEV)2020–present603–612 hp (450 kW) @ 5,750–6,500 rpm; 850 Nm @ 2,500–4,500 rpm— (pattern data)£7,500–£12,000【PLACEHOLDER】

Technical Specs

M177 4.0 V8 twin‑turbo, V167

Displacement3,982 cc

Cylinders8‑cylinder V‑configuration

Compression Ratio8.6:1

Fuel SystemDirect injection

TurbochargerTwin‑turbo (hot‑vee)

Mild Hybrid48V EQ Boost with integrated starter generator (+17–23 hp)

→ Compare GLE 63 AMG engine prices for your Mercedes

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Market Intelligence

Most Common Failure

M157: cylinder scoring / valve stem seal wear; M177: oil separator / RMS leaks【PATTERN DATA】

Average Enquiry Mileage

50,000

–70,000 miles【PATTERN DATA】

Average Replacement Cost

£8,500

–£10,500 reconditioned, supply only【PLACEHOLDER — confirm vs cost sheet】

Most Requested Engine Code

M157 (W166/C292) — approximately 60% of GLE 63 enquiries【PATTERN DATA】

Peak Enquiry Season

Autumn/Winter — cold starts expose valve seal and oil leak issues【PATTERN DATA】

Regional Demand

South East18%

London16%

South West (13%)【PATTERN DATA】

Regional Demand Breakdown

18%South East

16%London

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.

Find the best Mercedes GLE 63 AMG engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence — from £3,500 for a used unit to £13,500 for a fully rebuilt AMG V8.

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