Mercedes Benz S Class 430/580 V8 Engine ReplacementCompare 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
Nationwide Delivery
100+ Suppliers
From £3,200 to £8,200
Used from £1,800 · Reconditioned from £3,200 · Common codes: M113.941, M176.980
From £1,800
Tested, bare/short engine
From £3,200
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mercedes Benz S Class 430/580 V8 Replacement Engineto Finding the Best Mercedes Benz S Class 430/580 V8 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMercedes 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.
Variant HistoryMercedes 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
Fuel TypePetrol (M113: naturally aspirated SOHC V8; M176: twin-turbo DOHC V8 with 48V MHEV)
Engine Size Range4.0L-4.3L (M113: 4,266cc; M176: 3,982cc)
Power Output Range279-496hp across the variant's historyEngine History Timeline
M113.941 4.3L naturally aspirated V8, 279hp @ 5,750rpm (S 430, W220 launch)
2006 - M113.941 continues as the core V8 engine for S 430 through W220 production
M176.980 4.0L twin-turbo V8 with 48V EQ Boost, 496hp @ 5,500rpm (S 580, W223)
M176.980 updated with CAMTRONIC cylinder deactivation software refinements
Key Specs Snapshot
Fuel TypePetrol (M113: naturally aspirated SOHC V8; M176: twin-turbo DOHC V8 with 48V MHEV)Engine Size Range4.0L-4.3L (M113: 4,266cc; M176: 3,982cc)Power Output Range279-496hp across the variant's historyYears Produced1998-2006 (S 430); 2021-present (S 580)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.
Mercedes Benz S Class 430/580 V8 Engine Codes - Specifications & Replacement CostMercedes Benz S Class 430/580 V8 Engine Codes - Specifications & Replacement Cost
4.3L Naturally Aspirated V8 (1998-2006)
Power Output279 hp (205 kW) @ 5,750 rpmTorque400 Nm @ 3,000-4,400 rpmYears Fitted1998-2006Displacement4,266 cc (4.3L)CylindersV8, 90° V-angle, SOHC, 24-valve (3 valves per cylinder)Engine CodeM 113 E 43 / 113.941
Compatible Trim Levels
- S 430
- S 430 4MATIC
- S 430 L (W220, 220.070/220.170)
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,500
Reconditioned
Addressed known issues, tested
£3,000-£4,200
Rebuilt
Full teardown, upgraded internals
£3,500-£5,000
Common Failure
Oil leaks and timing chain tensioner wear - the M113 V8 is known for developing slow oil leaks from valve cover gaskets, oil filter housing gaskets, and the front crankshaft seal. Timing chain tensioner issues can cause rattling noises on startup.
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.
The S 430 V8's Age-Related Issues
Affected Vehicles
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.
Why It Happens
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.
Dealer (parts + labour)
£600-£1,000
Specialist (parts + labour)
£350-£600
What it involves
Replace valve cover gaskets, clean oil seepage
Suitability
If oil leaks are minor and localised
1 - 2 daysDealer (parts + labour)
£1,200-£2,000
Specialist (parts + labour)
£800-£1,400
What it involves
Replace timing chain tensioner, inspect chain guides
Suitability
If cold-start rattle is present
1 - 2 daysDealer (parts + labour)
£5,500-£7,500
Specialist (parts + labour)
£3,500-£5,000
What it involves
Complete engine swap with new gaskets, seals, and timing components, 12-month warranty
Suitability
If oil loss or timing failure has caused internal damage
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 |
|---|---|---|---|---|---|
 Minor - Valve cover gasket replacement Minor | £600-£1,000 | £350-£600 | Replace valve cover gaskets, clean oil seepage | If oil leaks are minor and localised | 1 - 2 days |
 Intermediate - Timing chain tensioner replacement Best Value | £1,200-£2,000 | £800-£1,400 | Replace timing chain tensioner, inspect chain guides | If cold-start rattle is present | 1 - 2 days |
Full Replacement - Rebuilt M113 engine Best Value | £5,500-£7,500 | £3,500-£5,000 | Complete engine swap with new gaskets, seals, and timing components, 12-month warranty | If oil loss or timing failure has caused internal damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 1998-2006 S 430 is worth approximately £3,000-£8,000 depending on condition and mileage. These flagship saloons have depreciated significantly, meaning replacement costs can approach vehicle value for higher-mileage examples.
Our Recommendation
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.
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.
Compare rebuilt M113 Mercedes S 430 V8 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 Mercedes S Class 430 or 580 V8. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mercedes Benz S Class 430/580 V8 Engine ReplacementFrequently Asked Questions
Question 1How much does a Mercedes S 430 or S 580 V8 engine replacement cost in the UK-
Short summary: A rebuilt M113 engine for the S 430 costs £3,500-£5,000 supply-only; a rebuilt M176 V8 for the S 580 costs £5,200-£8,200 supply-only. Fitting adds £1,500-£2,500 depending on complexity - V8 work requires specialist knowledge.
- S 430 (M113.941): rebuilt unit £3,500-£5,000; used engine from £1,500
- S 580 (M176.980): rebuilt unit £5,200-£8,200; used engine from £3,000
- M113 timing chain tensioner replacement: £800-£1,400 at specialist
- M176 oil separator replacement: £800-£1,400 at specialist
Question 2What are the signs of oil separator failure on a Mercedes S 580-
Short summary: A high-pitched whistling noise at idle, rough idle, or a check engine light are the classic warning signs on the M176 engine. If ignored, it can lead to a blown rear main seal and a massive oil leak.
- Whistling or howling sound from the engine at idle
- Rough idle or check engine light
- Oil consumption or oil leaks from the rear of the engine
- If caught early, oil separator replacement costs £800-£1,400 at specialist
Question 3Is the Mercedes S 580 V8 engine (M176) reliable-
Short summary: The M176 is a powerful and sophisticated engine, but it has known oil separator issues and CAMTRONIC software vulnerabilities. With these addressed, the engine is proving durable.
- Oil separator (PCV) failure is the most common mechanical issue
- CAMTRONIC software recall affects 2021-2023 models
- Turbocharger and 48V system issues have been reported
- Well-maintained M176 engines exceed 100,000 miles
Question 4How long do Mercedes S 430 and S 580 V8 engines last-
Short summary: Properly maintained M113 engines routinely reach 200,000+ miles. One owner reported an M113 engine exceeding 340,000 miles. The M176 is too new for definitive long-term data, but with proactive maintenance, 100,000+ miles is achievable.
- M113 (S 430): 200,000+ miles with regular servicing
- M176 (S 580): too early for definitive data - oil separator and CAMTRONIC issues from 20k-80k miles
- Service interval is 10,000 miles or 12 months - use Mercedes-spec oil (MB 229.5)
- Late oil changes accelerate oil separator failure and timing chain wear
Question 5Is it worth replacing the engine in my Mercedes S 430 or S 580 V8-
Short summary: Yes, if the S-Class is otherwise in good condition with no rust or major transmission faults. A rebuilt M113 costs £3,500-£5,000 - comparable to the value of a £3,000-£8,000 vehicle, making it a justifiable investment for well-maintained examples. The S 580's higher value (£45,000-£80,000) makes replacement even more financially justifiable.
- S 430 values: £3,000-£8,000 depending on year, mileage and condition
- S 580 values: £45,000-£80,000 - flagship V8 residual values remain strong
- Rebuilt engine with upgraded components fixes original weak points
- Supply & fit typically £5,000-£10,700 depending on engine code
- New engine includes 12-month unlimited mileage warranty
Question 6What oil does my Mercedes S 430 or S 580 V8 need-
Short summary: Mercedes-Benz specifies MB 229.5 high-performance oil - typically 5W-30 or 5W-40 fully synthetic. The M113 V8 requires approximately 8.0 litres; the M176 V8 requires approximately 9.5 litres.
- M113 (S 430): MB 229.5 5W-30 or 5W-40 - 8.0L capacity
- M176 (S 580): MB 229.5 5W-30 or 5W-40 - 9.5L capacity
- Never use non-approved oil - can cause timing chain and hydraulic lifter issues
- Change every 10,000 miles or 12 months - stretched intervals cause oil separator failure
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supply & fit available for M113 and M176
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