01
BMW M3
Generation/Chassis
G80
Badge(s)
M3, M3 Competition, M3 Competition xDrive, M3 CS
Years
2021-present
Link
BMW S58B30 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
BMW's most powerful production straight-six - the 3.0-litre twin-turbo M engine powering the M3, M4, X3 M and X4 M from 2019 onward. A closed-deck evolution of the B58 with 473-530 hp depending on tune. Reconditioned S58B30 units from £10,830, with 410 UK replacement requests in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£6,500
Reconditioned from
£10,830
Rebuilt from
£13,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
BMW S58B30 - Specifications at a Glance
Engine Code
S58B30 (S58B30O0, S58B30T0 variants)
Fuel
Petrol
Configuration
3.0L inline-6, twin-turbocharged, closed-deck block, direct injection
Power Output(s)
473 hp (base) / 510-530 hp (Competition) / 551 hp (CS)
Years Produced
2019-present
UK Models Fitted
6+ BMW M models - full list in Compatibility below
2025 UK Replacement Requests
410
Replaced
S55B30 (F80 M3 / F82 M4)
Replaced By
S58 remains current; successor not yet announced
Most Common Failure
Cooling system leaks, PCV valve failure, turbo wastegate rattle
Reconditioned Price Range
£10,830-£13,500 supply-only
Vetted UK specialists for S58B30 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the S58B30-
The S58B30 is BMW M's flagship straight-six, introduced in 2019 and fitted exclusively to M-division models. It replaced the S55 in the M3/M4 and brought M power to the X3 and X4 for the first time. The engine is offered in multiple states of tune, with the S58B30O0 powering base manual models and the S58B30T0 reserved for Competition, CS, and CSL variants.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 BMW M3 | G80 | M3, M3 Competition, M3 Competition xDrive, M3 CS | 2021-present | |
 BMW M4 Coupe | G82 | M4, M4 Competition, M4 Competition xDrive, M4 CSL | 2021-present | |
| BMW M4 Convertible | G83 | M4 Competition xDrive Convertible | 2022-present | |
 BMW X3 M | F97 | X3 M, X3 M Competition | 2019-present | |
 BMW X4 M | F98 | X4 M, X4 M Competition | 2019-present | |
 BMW M2 | G87 | M2 | 2023-present |
02
BMW M4 Coupe
Generation/Chassis
G82
Badge(s)
M4, M4 Competition, M4 Competition xDrive, M4 CSL
Years
2021-present
Link
03
BMW M4 Convertible
Generation/Chassis
G83
Badge(s)
M4 Competition xDrive Convertible
Years
2022-present
04
BMW X3 M
05
BMW X4 M
06
BMW M2
CROSS-BRAND
S58B30 is documented across 6 BMW applications spanning BMW M3, BMW M4 Coupe, BMW M4 Convertible, BMW X3 M, BMW X4 M, BMW M2. Registration lookup confirms the exact suffix before quotes are sent.
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Not sure which engine your car has- Enter your registration above - we'll confirm your exact S58B30 variant before any quotes are sent.
Prices
BMW S58B30 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £6,500-£9,000 | £7,800-£10,600 | 3-6 months |
Reconditioned | £10,830-£13,500 | £12,110-£14,780 | 12-24 months |
Rebuilt | £13,500-£18,000 | £14,780-£19,280 | 12-24 months |
The biggest price movers for an S58B30 replacement are the condition of the twin turbochargers (OEM replacements are £2,000+ each), the state of the cooling system, and whether the engine is a base 473 hp O0 variant or a 530 hp T0 Competition unit. The cylinder head incorporates 3D-printed core technology - this is not a standard engine to rebuild, and only specialists with M-division experience should be trusted. Post-2022 units with the revised oil pump design and CS/CSL-spec internals command a premium. See our full /prices/reconditioned-engine-cost guide for more detail.
Labour Guide
Fitting an S58B30 typically takes 16-22 hours at £80-£120/hr (independent M specialist) - the twin-turbo setup, closed-deck block, and complex cooling system make this a significantly more labour-intensive job than a standard B58 replacement.
Price Factors
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Common Problems
BMW S58B30 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the S58B30, based on real-world data and verified failure patterns.
Verified issue focus: Cooling system leaks, PCV valve failure, turbo wastegate rattle.
1. Cooling System Leaks - water pump, thermostat housing, and radiator connections
1. Cooling System Leaks - water pump, thermostat housing, and radiator connections
Typical onset:
60,000-100,000 miles
What happens:
The S58 runs hot by design - it has a large central radiator and two smaller flanking radiators plus separate engine oil and transmission fluid coolers. This complex cooling system has multiple plastic fittings and connections that can become brittle over time. The water pump and thermostat housing are known wear points, with coolant loss being the most common early warning. Overheating on an S58 can cause catastrophic damage very quickly.
Repair vs replace:
Water pump and thermostat replacement is a specialist job (£600-£1,200) given the engine's tight packaging. If the engine has been overheated, head gasket failure may write off the unit entirely - replacement is the only safe route. Read our full /failures/coolant-system-failure guide
Read more about this issue
2. PCV Valve / Valve Cover Failure
2. PCV Valve / Valve Cover Failure
Typical onset:
70,000-120,000 miles
What happens:
Like the B58, the S58 integrates the PCV valve into the cylinder head cover - it cannot be serviced individually. When the PCV diaphragm fails, the engine develops a loud whistle at idle (which stops when the oil cap is removed), rough running, increased oil consumption, and potential oil leaks from seals. A stuck-open PCV valve creates a large vacuum leak, leading to poor drivability and potential stalling.
Repair vs replace:
The entire cylinder head cover must be replaced (£800-£1,500). This is a known design compromise on the S58 and should be budgeted for on higher-mileage examples.
Read more about this issue
3. Turbocharger Wastegate Rattle and Charge Pipe Leaks
3. Turbocharger Wastegate Rattle and Charge Pipe Leaks
Typical onset:
80,000-150,000 miles
What happens:
The S58's twin single-scroll turbochargers (one per three cylinders, supplied by Mitsubishi) feature electronically controlled wastegates. Over time, wastegate bushings can wear, causing a metallic rattle on cold start and part-throttle operation. Charge pipes, intercooler fittings and rubber couplers can also crack or leak under the high boost pressures the S58 runs, causing power loss or inconsistent acceleration.
Repair vs replace:
Wastegate repair requires turbocharger disassembly or replacement - a significant cost (£1,500-£3,000 per turbo). Charge pipe replacement is more straightforward (£400-£800) but should be addressed promptly.
Read more about this issue
The S58 is widely regarded as one of BMW M's most reliable modern engines, with no widespread catastrophic failures reported like the S55's crank hub issues. The S58 features a solidly forged crank hub with 4-screw fixation, addressing the S55's weakness. Post-2022 units received further refinement; the S58 has proven capable of 700+ hp on stock internals with supporting modifications. Early bearing shell issues affecting some 2021 production cars were addressed by BMW under warranty.
Compare rebuilt S58B30 prices with the failure already addressed
Engine Variants
How to Confirm You Have the S58B30
The S58B30 is a Specific engine code covering BMW M's twin-turbo straight-six. Unlike Family pages that cover multiple fundamentally different engines, this page covers the S58 as a single engine family with multiple output tunes. The engine is BMW M's own design, developed from the B58 architecture but featuring significant M-specific hardware. Where to find your engine code: The engine code is stamped on a machined pad on the engine block, visible from the driver's side of the engine bay. It also appears on the V5C registration document under "Engine number" (e.g. S58B30O0xxxxxx or S58B30T0xxxxxx). For BMW models, the VIN decoder will also confirm the exact variant from the vehicle's build sheet. Key S58B30 variants: | Variant | Power | Key Difference | Applications | |---|---|---|---| | S58B30O0 | 473 hp (353 kW) | Base tune, lower boost, paired with 6-speed manual | G80 M3 base, G82 M4 base | | S58B30T0 | 510-530 hp (375-390 kW) | Higher boost, Competition mapping, 8-speed auto, xDrive available | M3/M4 Competition, M3 CS, M4 CSL, X3 M Comp, X4 M Comp | | S58B30T0 (CS/CSL) | 551 hp (405 kW) | Ultimate tune, revised cooling, lightweight internals | M3 CS, M4 CSL | Why fitting the wrong variant matters: While the S58B30O0 and S58B30T0 share the same physical architecture, they have different ECU calibrations, boost levels, and in some cases, different cooling system components and transmission pairings. Fitting a base O0 ECU into a Competition-spec car will result in significant performance loss and potential DME mismatch errors. The CS/CSL variants feature unique internals and cooling - these are not a straight swap into a standard M3 or M4 without supporting modifications. Commonly confused codes: | Engine Code | What it is | Why it's confused | |---|---|---| | B58B30O0 | 473 hp B58 TU used in X3 M40i (2018-2019) | Similar power output but single-turbo, open-deck block, fundamentally different engine | | B58B30M0 | 326 hp B58 used in 540i, 740i | Same displacement but single-turbo, road car spec | | S55B30 | 425-444 hp S55 used in F80 M3 / F82 M4 | Predecessor - different architecture, open-deck, known crank hub issues |
Not sure which code you have- Enter your registration above and we'll confirm the exact S58 variant before any quotes are sent.
Easily Confused
S55B30
the S58's predecessor, fitted to the F80 M3 and F82 M4 from 2014-2020. The S55 was a 3.0-litre twin-turbo open-deck engine producing 425-444 hp, but it suffered from a well-documented crank hub weakness that the S58's forged 4-screw hub design entirely resolves. If you're upgrading from an F-series M car, the S58 offers significantly more reliability and tuning headroom.
Alternative / Next-Gen Code
S58TU2
BMW's next iteration of the M straight-six, expected to feature further cooling and efficiency refinements. While the S58B30 remains current across the G-generation M portfolio, the TU2 evolution is already being rolled out in limited models.
Confirm the exact S58B30 fitment
Not sure which code you have- Enter your registration above and we'll confirm the exact S58 variant before any quotes are sent.
Buying Guide
Buying a Replacement S58B30 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used S58B30 can make financial sense for lower-mileage donor engines from accident-damaged vehicles. However, given the S58's high-performance nature and potential for track use, used units must come with full service history and ideally a compression test. Avoid early 2021 production units without documented bearing shell inspection - some early cars were affected by bearing issues, addressed under warranty. Used prices from £6,500-£9,000 reflect the risk; a £10,830 reconditioned unit with warranty is often better value. Link once:
Reconditioned:
A properly reconditioned S58B30 addresses the engine's known weak points: new water pump, thermostat, PCV valve/cylinder head cover, timing components, and full gasket set. Given the £10,830-£13,500 supply cost and the high value of S58-powered vehicles (£30,000-£80,000+), reconditioning is the recommended choice for most owners. A 12-24 month warranty provides essential peace of mind on an engine that can cost over £20,000 from BMW new. Link once:
Rebuilt:
A full S58B30 rebuild is justified for high-value, low-mileage vehicles or where the engine has suffered a specific failure (e.g. overheated, bottom-end damage). An upgraded rebuild should include forged pistons, upgraded rod bearings, and a strengthened oil pump - particularly relevant for owners planning significant tuning (700+ hp builds). Rebuild costs (£13,500-£18,000+) are significant but still well below a new OEM crate engine from BMW (estimated £25,000+). Only M-specialist workshops with S58 experience should be trusted. Link once:
Supply & Fit Line:
All supply options can be fitted through our network of vetted BMW M specialists nationwide, with a minimum 12-month warranty on reconditioned and rebuilt units and full nationwide delivery coverage. Link once:
Vehicle Value Note:
The S58B30 sits exclusively in high-value M vehicles: G80 M3 (£30,000-£70,000), G82 M4 (£35,000-£80,000), F97 X3 M (£25,000-£55,000), and F98 X4 M (£28,000-£60,000). A £10,830-£13,500 reconditioned unit represents 15-35% of the vehicle's value - well within the "safe" replacement threshold on most examples. On higher-mileage X3 M or X4 M examples approaching £18,000-£22,000, the replacement cost may approach 40-50% of value; evaluate the overall condition, service history, and whether the vehicle has been tracked before committing. For the M3 and M4, the higher retained value comfortably absorbs the replacement cost.
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Related Engines
Engines Related to the BMW S58B30
Explore engines that are closely related to the BMW S58B30, including its predecessor, successor, and key family variants.
Predecessor
S55B30
the S58's predecessor, fitted to the F80 M3 and F82 M4 from 2014-2020. The S55 was a 3.0-litre twin-turbo open-deck engine producing 425-444 hp, but it suffered from a well-documented crank hub weakness that the S58's forged 4-screw hub design entirely resolves. If you're upgrading from an F-series M car, the S58 offers significantly more reliability and tuning headroom.
Successor
S58TU2
BMW's next iteration of the M straight-six, expected to feature further cooling and efficiency refinements. While the S58B30 remains current across the G-generation M portfolio, the TU2 evolution is already being rolled out in limited models.
FAQ
BMW S58B30Frequently Asked Questions
Question 1How much does a BMW S58B30 engine replacement cost in the UK-
A reconditioned S58B30 supply-only typically costs between £10,830 and £13,500, with fitted prices ranging from £12,110 to £14,780 depending on labour and additional parts. Used units start from £6,500 supply-only, while full rebuilds run £13,500-£18,000. All reconditioned figures are [EM-QUOTE] from UK M specialists; used pricing is [THIRD-PARTY] marketplace data. Prices vary significantly by variant - Competition/CS/CSL units command a premium. Supply-only excludes fitting; add 16-22 hours at £80-£120/hr for specialist installation. Always compare quotes - M-specialist labour rates can vary by 30%.
- Prices vary significantly by variant - Competition/CS/CSL units command a premium.
- Supply-only excludes fitting; add 16-22 hours at £80-£120/hr for specialist installation.
- Always compare quotes - M-specialist labour rates can vary by 30%.
Question 2What is the most common failure on the BMW S58B30-
Cooling system leaks - from the water pump, thermostat housing, and radiator connections - are the most frequently reported issue, typically appearing at 60,000-100,000 miles. The S58 runs hot with its complex multi-radiator cooling setup, and plastic fittings can become brittle. PCV valve failure (requiring cylinder head cover replacement) and turbo wastegate rattle are also common on higher-mileage units. Unlike the S55, crank hub failure is not a widespread concern on the S58. Early 2021 production cars had isolated bearing shell issues, addressed under warranty. Overheating can write off an S58 quickly - address coolant leaks immediately.
- Unlike the S55, crank hub failure is not a widespread concern on the S58.
- Early 2021 production cars had isolated bearing shell issues, addressed under warranty.
- Overheating can write off an S58 quickly - address coolant leaks immediately.
Question 3Which BMW models use the S58B30 engine-
The S58B30 is fitted exclusively to BMW M models from 2019 onward: G80 M3, G82 M4, G83 M4 Convertible, F97 X3 M, F98 X4 M, and G87 M2. The engine comes in multiple tunes - base M3/M4 (473 hp), Competition variants (510-530 hp), and CS/CSL (551 hp). X3 M and X4 M receive the Competition tune as standard. All models are M-division products - no standard BMW road car uses the S58. Check your V5C or engine block stamp to confirm whether you have O0 or T0 variant. The S58 is not shared with any other brand - it is BMW M-exclusive.
- All models are M-division products - no standard BMW road car uses the S58.
- Check your V5C or engine block stamp to confirm whether you have O0 or T0 variant.
- The S58 is not shared with any other brand - it is BMW M-exclusive.
Question 4Should I buy a used, reconditioned, or rebuilt S58B30-
For most M3/M4 and X3 M/X4 M owners, a reconditioned unit is the best balance - it addresses known weaknesses (cooling, PCV, gaskets) and comes with a 12-24 month warranty. Used units (£6,500-£9,000) are cheaper but carry higher risk unless they have full service history and a compression test. Rebuilds (£13,500-£18,000) are reserved for high-value, low-mileage vehicles or those planning significant tuning. Used: only from low-mileage, accident-damaged donors with documented history. Reconditioned: recommended for most road cars - all known weak points addressed. Rebuilt: ideal for tracked cars or 700+ hp builds with upgraded internals.
- Used: only from low-mileage, accident-damaged donors with documented history.
- Reconditioned: recommended for most road cars - all known weak points addressed.
- Rebuilt: ideal for tracked cars or 700+ hp builds with upgraded internals.
Question 5How do I know if my car has the S58B30O0 base variant or the S58B30T0 Competition variant-
The engine code is stamped on a machined pad on the block, visible from the driver's side - it will read S58B30O0 or S58B30T0. It also appears on the V5C under 'Engine number'. The easiest method is to check your vehicle's VIN using a BMW decoder, which will list the exact engine code from the factory build sheet. O0 = 473 hp, 6-speed manual (base M3/M4) or 460 hp (G87 M2). T0 = 510-551 hp, 8-speed automatic, Competition/CS/CSL tune. Fitting a Competition-spec engine into a base manual car requires ECU and cooling system changes.
- O0 = 473 hp, 6-speed manual (base M3/M4) or 460 hp (G87 M2).
- T0 = 510-551 hp, 8-speed automatic, Competition/CS/CSL tune.
- Fitting a Competition-spec engine into a base manual car requires ECU and cooling system changes.
Question 6Is the S58B30 reliable, and what mileage can I expect-
The S58 is widely considered BMW M's most reliable modern engine, with many owners reporting 100,000+ trouble-free miles when properly maintained. The closed-deck block, forged internals, and 4-screw crank hub design address the S55's key weaknesses, and the engine has proven capable of 700+ hp on stock hardware. Typical lifespan: 150,000-200,000 miles with proactive maintenance. Replace water pump and thermostat at 80,000 miles. Check PCV system around 70,000-100,000 miles. Full service history is essential - the S58 is not an engine to neglect.
- Replace water pump and thermostat at 80,000 miles.
- Check PCV system around 70,000-100,000 miles.
- Full service history is essential - the S58 is not an engine to neglect.
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