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Mercedes S 430/580 V8 SPECIALISTS

Mercedes Benz S Class 430/580 V8 Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Mercedes Benz S Class 430 and 580 V8 engine specialists. Compare prices on reconditioned, rebuilt and used engines for the 4.3-litre and 4.0-litre twin-turbo V8s - supply & fit available nationwide.

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12-Month Warranty
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Mercedes Benz S Class 430/580 V8 Engine
from£3,200 to £8,200
  • Usedfrom £1,800
  • Reconditionedfrom £3,200
  • Common codesM113.941, M176.980
Mercedes Benz s-class 430/580 V8 Used Engine — M113.941Mercedes Benz s-classUsed Engine — M113.941Mercedes Benz s-class 430/580 V8 Reconditioned Engine — M113.941Mercedes Benz s-classReconditioned Engine — M113.941Mercedes Benz s-class 430/580 V8 Rebuilt Engine — M113.941Mercedes Benz s-classRebuilt Engine — M113.941

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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

Mercedes Benz S Class 430/580 V8 Engine History & Specs at a Glance

The S 430 launched with the W220 generation in 1998 as the entry-level V8 flagship, powered by the M113 4.3-litre naturally aspirated V8 producing 279hp - a robust, SOHC engine that defined Mercedes V8 reliability for over a decade. In 2021, the all-new W223 S 580 introduced the M176 4.0-litre twin-turbo V8 with 48V EQ Boost mild-hybrid technology, delivering 496hp and representing a quantum leap in V8 performance and efficiency.

Mercedes Benz S Class 430/580 V8
  1. 1998

    M113.941, 4.3L naturally aspirated V8, 279hp @ 5,750rpm (S 430, W220 launch)

  2. 1999

    2006 - M113.941 continues as the core V8 engine for S 430 through W220 production

  3. 2021

    M176.980, 4.0L twin-turbo V8 with 48V EQ Boost, 496hp @ 5,500rpm (S 580, W223)

  4. 2023

    M176.980 updated with CAMTRONIC cylinder deactivation software refinements

Every engine fitted to the Mercedes Benz S Class 430 and 580 V8 is covered below, with UK rebuilt pricing and known failure points - from M113 oil leaks and timing chain wear to M176 oil separator failure and CAMTRONIC software issues.

Engine Codes & Pricing

Mercedes Benz S Class 430/580 V8 Engine Codes Specifications & Replacement Cost

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

M113.941 — 4.3L Naturally Aspirated V8 (1998-2006) engine

M113.941 — 4.3L Naturally Aspirated V8 (1998-2006)

Power Output
279 hp (205 kW) @ 5,750 rpm
Torque
400 Nm @ 3,000-4,400 rpm
Years Fitted
1998-2006
Displacement
4,266 cc (4.3L)
Cylinders
V8, 90° V-angle, SOHC, 24-valve (3 valves per cylinder)
Engine Code
M 113 E 43 / 113.941

Can’t find your exact engine code?

-> Get quotes for M113.941 Mercedes S 430 V8 engine replacement

Common Problems

Mercedes Benz S Class 430/580 V8 Engine Problems Repair Cost vs Replacement

The S 430's M113 V8 and the S 580's M176 V8 represent two very different eras of Mercedes V8 engineering - the M113 is a robust, naturally aspirated SOHC design renowned for durability, while the M176 is a sophisticated twin-turbo DOHC unit with mild-hybrid technology. Both have well-documented weaknesses that can lead to significant repair costs. The M113 suffers from oil leaks and timing chain tensioner wear, while the M176 is prone to oil separator failure and CAMTRONIC software issues. Every rebuilt engine supplied through EnginesMarket includes upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

M113 Oil Leaks & Timing Chain Tensioner Wear

Affected
Mercedes S 430 (M113.941, 1998-2006)
Typical failure mileage
80,000-150,000 miles
Root cause
The M113 V8 is known for developing slow oil leaks over time from valve cover gaskets, oil filter housing gaskets, and the front crankshaft seal. Timing chain tensioner issues can cause rattling noises on startup, and if ignored, can lead to more serious engine damage.

Repair options

Repair tierDealer priceSpecialist price
Minor - Valve cover gasket replacement£600-£1,000£350-£600
Intermediate - Timing chain tensioner replacement£1,200-£2,000£800-£1,400
Full Replacement - Rebuilt M113 engine£5,500-£7,500£3,500-£5,000
Our recommendation
Oil leaks on the M113 are common with age but not usually urgent unless they are heavy. Valve cover gasket replacement at a specialist is significantly cheaper than dealer rates. If you hear a rattling noise on cold start, have the timing chain tensioner inspected immediately - catching it early can prevent more serious engine damage.
-> Compare rebuilt M113 Mercedes S 430 V8 engine prices

M176 Oil Separator (PCV) Failure

Affected
Mercedes S 580 (M176.980, 2021-present)
Typical failure mileage
40,000-80,000 miles
Root cause
The M176 engine suffers from PCV oil separator diaphragm failure. Heat bakes the internal diaphragms of these valves, and a failing separator will often cause a high-pitched whistling noise at idle, a rough idle, or a check engine light, eventually culminating in a blown rear main seal and a massive oil leak. Mercedes-Benz mandates that both oil separators must be replaced anytime a rear main seal is found leaking to prevent repeat failure.

Repair options

Repair tierDealer priceSpecialist price
Diagnostics - Oil separator/PCV check£200-£400£150-£300
Intermediate - Oil separator replacement£1,200-£2,000£800-£1,400
Major - Rear main seal replacement£3,500-£5,500£2,500-£3,800
Full Replacement - Rebuilt M176 engine£12,000-£18,000£5,200-£8,200
Our recommendation
The oil separator is the root cause of most M176 rear main seal leaks. If you hear a whistling noise at idle or notice a rough idle, have the PCV system checked immediately. If caught early, replacing the oil separators alone (£800-£1,400 at a specialist) prevents the much more expensive rear main seal replacement. On an S 580 worth £45,000-£80,000, the full rebuilt engine route is justifiable if bottom-end damage has occurred.
-> Compare rebuilt M176 Mercedes S 580 V8 engine prices

M176 CAMTRONIC Software & Cylinder Deactivation Issues

Affected
Mercedes S 580 (M176.980, 2021-2023)
Typical failure mileage
20,000-60,000 miles
Root cause
A software defect in the engine control unit affects the CAMTRONIC variable valve lift adjustment system. In the event of a mechanical failure in the CAMTRONIC system, the ECU software may cause the engine to overheat or stall. If the CAMTRONIC system fails while the engine is in fuel-saving mode (4 cylinders deactivated), the lambda control system may not deactivate as intended, incorrectly increasing fuel injection, which can raise exhaust gas temperatures and damage components such as the wiring harness or catalytic converter. Over 27,000 vehicles were recalled for this issue.

Repair options

Repair tierDealer priceSpecialist price
Recall Remedy - ECU software update£0 (if recall applies)N/A
Diagnostics - CAMTRONIC system inspection£200-£400£150-£300
Intermediate - CAMTRONIC component replacement£2,500-£4,500£1,800-£3,200
Full Replacement - Rebuilt M176 engine£12,000-£18,000£5,200-£8,200
Our recommendation
If your S 580 is subject to the CAMTRONIC recall, have the ECU software update performed at a Mercedes dealer free of charge. If symptoms persist, have the CAMTRONIC system inspected by a specialist. On an S 580 worth £45,000-£80,000, preventative attention to this issue is always the better investment.
-> Compare M176 Mercedes S 580 V8 engine quotes

M176 Turbocharger & 48V System Issues

Affected
Mercedes S 580 (M176.980, 2021-present)
Typical failure mileage
40,000-80,000 miles
Root cause
The M176's twin-turbochargers can suffer from bearing wear due to heat buildup, oil starvation, or actuator malfunctions. The 48V EQ Boost system can also experience battery or ISG (Integrated Starter-Generator) failures, triggering warning lights and loss of hybrid assistance.

Repair options

Repair tierDealer priceSpecialist price
Minor - 48V system diagnostics£200-£400£150-£300
Intermediate - 48V battery replacement£2,200-£3,500£1,800-£2,500
Major - Turbocharger replacement£4,000-£7,000£2,800-£4,500
Full Replacement - Rebuilt M176 engine£12,000-£18,000£5,200-£8,200
Our recommendation
48V system faults on the M176 require specialist diagnostics. If you notice a loss of power or hear turbocharger noise, have the turbos and 48V system inspected immediately. On an S 580 worth £45,000-£80,000, preventative maintenance is always the better investment.
-> Compare M176 Mercedes S 580 V8 engine quotes

Don't Let Oil Leaks, Oil Separator Failure, or CAMTRONIC Issues Write Off Your Mercedes S 430 or 580 V8

Whether you're facing M113 oil leaks and timing chain tensioner wear on your S 430 or M176 oil separator failure and CAMTRONIC issues on your S 580, EnginesMarket makes it simple to compare quotes from trusted UK Mercedes V8 specialists. Every rebuilt engine in our network carries upgraded components addressing the original design weakness - new gaskets and seals, reinforced oil separators, and updated CAMTRONIC components - plus a minimum 12-month unlimited mileage warranty with nationwide delivery and supply & fit options. Don't pay main dealer premiums. Compare prices from independent Mercedes V8 specialists who know these flagship V8 engines inside out.

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FAQ

Mercedes Benz S Class 430/580 V8 Engine ReplacementFrequently Asked Questions

Everything Mercedes Benz S Class 430/580 V8 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare Mercedes S Class 430/580 V8 Engine Prices Today

Comparing quotes for your Mercedes S 430 or S 580 V8 is completely free, with no obligation and no pressure. Enter your registration above to get tailored quotes from UK Mercedes V8 specialists who understand the M113 and M176 engines inside out. Whether you need a used engine, a reconditioned unit, or a full rebuilt engine with upgraded gaskets, oil separators, and CAMTRONIC components, we'll connect you with the right specialist for your exact S-Class - with a minimum 12-month warranty on every engine supplied.

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