Amongst all the enduring BMW engines, a comparatively new engine has already left its mark on historical past. It has been quietly proving its means and carving out its repute as one of many best and presumably most dependable BMW engines. That is loads to ask of any engine, regardless of the B58 sharing loads with the N55, its predecessor. There are additionally correlations between the BMW B58 and the Toyota 2JZ. Iconic is an overused time period, however the 2JZ’s repute precedes it as an eminently tunable straight-six engine and likewise the star of the present within the twin-turbo MKIV Toyota Supra.
As we will see beneath, the 2JZGTE (the turbocharged model of the 2JZ) shares some traits with the B58, together with its strong repute. There are, after all, nonetheless many variations between the B58 and 2JZ. Within the MKV Toyota GR Supra, the B58 is operating the present below the hood of the flagship mannequin, all of which means that the B58 is a future icon within the making. Its accolades embody a WardsAuto Finest Engines award for 2016, 2017, 2019, and 2020. The BMW engine’s repute for reliability comes down to a couple of its options and skills, which we take a broad overview of all through this text. All of it begins with a narrative that started 9 a long time in the past.
Toyota 2JZGTE
BMW B58
Engine
3.0-liter, twin-turbocharged I6
3.0-liter, turbocharged I6
Energy
325 horsepower
382 horsepower
Torque
325 lb-ft of torque
384 lb-ft of torque
Bore/Stroke
86 mm / 86 mm
82 mm / 94.6 mm
Compression ratio
8.5:1
11.0:1
Block/head materials
Iron block, aluminum head
Aluminum
The Historical past Of The BMW B58
BMW’s relationship with the straight-six engine started with the BMW 303 sedan in 1933, over 90 years in the past. That model was a 1.2-liter engine with simply 30 horsepower. Through the years, the straight-six has featured in lots of BMW fashions, together with iconic automobiles such because the M1 and E36/E46 M3. In 2006, following a protracted line of naturally aspirated inline-six engines, the N54 marked the beginning of the model’s first mass-produced turbocharged gasoline engine.
The three.0-liter turbocharged N54 straight six ran from 2006 to 2016, after which its successor, the N55, was born.
BMW’s N55 was in its twilight years when the brand new and improved B58 got here into manufacturing, with largely new elements and plenty of upgrades to set it other than the N55 and set it up for fulfillment as one of many model’s most dependable and versatile engines ever. The B58 is a part of the modular engine design the place all cylinders share the identical 500-cc displacement. There are some similarities between the 2 – the B58 shares the N55’s aluminum head/block, has the identical 7,000-rpm redline, and is regulated by a timing chain. Each engines even have twin overhead camshafts, variable valve timing, and variable valve raise. Nonetheless, there are numerous different enhancements and adjustments made which embody however aren’t restricted to:
The cylinder bore and stroke are modified from 84 mm / 89.6 mm to 82 mm / 94.6 mm Its compression ratio elevated to 11.0:1 from 10.2:1 An additional 19 cc is added to the displacement general, which is a slight enhance over the N55 – 2,979 cc – 2,998 cc A twin-scroll turbocharger reduces turbo lag and gives horsepower and torque over a wider vary of engine rpm The closed deck design of the engine block is extra strong and may stand up to extra stress It encompasses a water-to-air intercooler within the consumption plenum; the N55 makes use of an air-to-air design
BMW B58 Engine Household Specs
Engine
B58B30M0
B58B30M1
B58B30C
B58B30O1
B58B30M2
S58B30T0
Engine Format
3.0-liter, I6, single turbocharged (twin-scroll)
3.0-liter, I6, twin-turbocharged
Bore x Stroke
82mm x 94.6mm
84mm x 90mm
Dates Produced
2015-2019
2018-present
2018-present
2018-present
2022-present
2019-present
Energy
322-355 hp
335 hp
335 hp
382 hp
375 hp
453-503 hp
Torque
322-369 lb-ft
369 lb-ft
369 lb-ft
369 lb-ft
384 lb-ft
406-479 lb-ft
The Updates BMW Made By means of The Years
BMW B58TU
Fairly than leaving the design as it’s, BMW additionally improved the B58 throughout its quick tenure from 2015 to immediately. In 2018, the B58 was revised – the engine after that’s known as the B58TU, carrying with it varied enhancements, notably the gas system. The gas pump and injectors had been upgraded, leading to a better injection strain of as much as 350 bar. Different adjustments had been made to the B58, together with the cooling system – a split-zone setup that creates a separate cooling circuit for the block and head with two pumps, one for every space. BMW fitted a one-piece timing chain, which changed the two-piece chain in pre-2018 B58 fashions. The B58’s crankshaft was revised with weight financial savings, serving to to scale back spinning mass. A cylinder head with an built-in exhaust manifold was one other fairly drastic change to the engine. All of those adjustments to the B58TU additional optimized the B58, leading to a sequence of modest enhancements that additional elevated the effectivity, reliability, and efficiency of the straight-six engine.
BMW B58TU2
In 2022, the B58TU2 replace introduced much more enhancements to the B58. In response to BMW, these adjustments embody “Redesigned consumption ports and combustion chambers, electronically managed VANOS variable camshaft timing, and 48-volt gentle hybrid expertise.” Port injection has additionally been added to this variant. Because the B58 continues to be in manufacturing, there could also be extra optimizations alongside the road. Nonetheless, as emissions rules change into extra stringent, the B58 will probably get replaced by a more moderen successor, presumably with heavier hybrid {hardware}.
What Makes The B58 So Dependable?
Regardless of the B58’s normal robustness and reliability, it’s, like all engines, fallible. Nonetheless, the engine’s design is mostly not the difficulty. The B58 requires common high quality upkeep to remain in form. Many issues come up from not accurately following this precept. Areas of the B58 that may be problematic aren’t essentially distinctive to this engine. In response to R44 Efficiency, widespread issues embody
Valve Cowl Gasket
The valve cowl gasket is a recognized challenge that is not distinctive to the B58 throughout the BMW engine household tree – the rubber seal between the valve cowl and cylinder head degrades over time because of the excessive temperatures and plenty of heating/cooling cycles. BMW’s B58 encompasses a warmth retention system that goals to retain warmth for longer. It goals to supply a extra gradual change in temperature, with much less of a drastic change in a brief period of time; it additionally helps in colder climates to keep away from engine injury as a result of very chilly begins.
Cylinder head gasket
Just like the valve cowl gasket, the cylinder head gasket may also perish as a result of excessive variety of warmth cycles over time – one thing the B58 might be liable to. Clearly, that is one other downside that may have an effect on any engine, and in accordance with R44 Efficiency, it’s often associated to a catastrophic coolant loss, which leads to overheating (one other challenge associated to the B58). This challenge is critical because the entry of coolant into the cylinder block can lead to excessive engine injury.
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Extreme Coolant Loss
Important coolant loss is one other reported challenge with the B58, generally stemming from defective seals. Different causes may very well be leaks from the coolant hoses or the radiator. Coolant leaks on this scale are nonetheless not one thing distinctive to the B58 and may have an effect on different fashionable, high-performance engines.
Oil Filter Disintegration
Lastly, oil filter disintegration can also be a reported challenge with some B58 engines. A crushed and torn filter is all the time a priority – an oil filter’s job is to filter dust and different particles, comparable to metallic particles, from the oil because it circulates by way of the engine. If the filter is damaged, these particles can go into the engine. Though this downside appears particular to the B58, it might once more be a symptom of the engine’s necessities for good high quality oil and repair intervals not being met. The BMW B58 requires servicing yearly or 10,000 miles.
Notable Vehicles At the moment Working The B58
Beneath, we take a look at a few of the most notable automobiles that function the B58 below their hoods. It is value mentioning that the B58 is a very versatile engine that has confirmed its means to adapt to totally different automotive sorts, from sports activities automobiles to the Ineos Grenadier off-roading utility car. On account of its flexibility, the B58 will function in varied kinds all through a lot of BMW’s mannequin vary in 2024. Listed below are a few of the most memorable automobiles which have used the B58 engine up to now.
BMW M340i / xDrive
BMW M340i & M340i xDrive
Engine Model
B58B30O1
Energy
382 hp
Torque
369 lb-ft
Drivetrain
Entrance engine, RWD/AWD
Transmission
8-speed computerized
Obtainable in rear-wheel drive and all-wheel drive within the case of the ‘xDrive’ variants, the BMW M340i is an instance of how the B58 can energy a sedan simply in addition to a compact sports activities automotive. It’s enhanced with a mild-hybrid system and options twin exhausts that enable the B58 to sing. In response to BMW, the hybrid tech provides somewhat additional increase when required whereas optimizing effectivity – two ideally suited qualities for a fast and highly effective sedan that may additionally double as a snug cruiser.
BMW 540i xDrive
BMW 540i xDrive
Engine Model
B58B30M2
Energy
375 hp
Torque
398 lb-ft
Drivetrain
Entrance engine, AWD
Transmission
8-speed computerized
In one other software of the B58 – this time the B58B30M2 variant – the engine exhibits off its flexibility within the large 5-Sequence. Regardless of not being a small or light-weight mannequin, the 3-liter engine’s elevated torque works properly within the heavier 540i xDrive, the place it sends energy uniquely to all 4 wheels. Whereas this variation of the B58 is seven horsepower down on the M340i above, it comes with an additional 29 lb-ft to present the 5-Sequence low-down torque, which fits the automotive’s cruiser nature. With 375 hp on faucet, it ought to nonetheless shift while you put your foot down.
Toyota GR Supra (A90)
Toyota GR Supra
Engine
B58B30C(2020), B58B30O1 (2021-present)
Energy
382 hp
Torque
369 lb-ft
Drivetrain
Entrance engine, RWD
Transmission
6-speed handbook, 8-speed computerized
Toyota’s GR Supra is offered in two flavors, one with a two-liter turbocharged 4-cylinder, and that is the high-power variant that comes with – you guessed it- the B58. There are two variations of the B58 within the Supra, which began with the 335-hp B58B30C and culminated within the 382-hp B58B30O1. Different markets topic to EU emissions rules use one other variant of the B58 (the B58B30M1) with 335 hp. The GR Supra additionally comes with an optionally available handbook transmission. The truth that Toyota selected this engine for the Supra’s grand return reveals how extremely the model recognized for reliability thinks of the B58
Ineos Grenadier
Ineos Grenadier
Engine Model
B58B30C
Energy
282 hp
Torque
331 lb-ft
Drivetrain
Entrance engine, AWD
Transmission
8-speed computerized
This implementation of the B58 is an actual shock. Ineos selected the engine for his or her off-roading utility car. Which means it needed to be robust, dependable, and appropriate for the sorts of challenges that anybody might realistically throw on the religious successor to the unique Land Rover Defender. It runs the B58B30C variant of the B58, which has additionally been detuned for reliability and optimized for the sort of abuse the engine will probably undergo within the fingers of fans. Time will inform, but when there was proof of the B58’s reliability and flexibility, the Grenadier is a effective instance.
Morgan Plus Six
Morgan Plus Six
Engine Model
B58B30M1
Energy
335 hp
Torque
369 lb-ft
Drivetrain
Entrance engine, RWD
Transmission
8-speed computerized
Morgan’s Plus Six appears like a basic automotive, however it’s a fashionable sports activities automotive that hides large efficiency potential below its retro hood. One other instance of how the B58 can match proper in, even in a unusual roadster just like the Morgan, is that it gives the marginally decrease energy output (335 hp) ‘M1’ model of the B58 coupled with an computerized transmission, sending energy to the rear wheels. The Plus Six is the antithesis of the 5-Sequence and Grenadier, but Morgan was nonetheless satisfied that the BMW inline-six was the appropriate engine for its dainty sports activities automotive.
BMW S58: The Excessive-Efficiency Variant Of The B58
The B58 wasn’t simply restricted to the choice of derivatives we now have seen above – there’s additionally the S58 model. The S58 is the high-performance relative of the B58, used for the BMW ‘M Sport’ fashions and Alpina-branded automobiles. It follows on from the S55 engine within the BMW high-performance engine lineup, launched within the F80 BMW M3. It was additionally a 3-liter, twin-turbocharged inline-six. The S58, produced from 2019, is not only a highly-tuned model of the B58; it has variations that distinguish it from the usual engine.
2019 BMW X3 M and X4 M
, in addition to their Competitors variants. Different fashions adopted, comparable to the enduring M3, different M-branded automobiles, and Alpina fashions.
The S58 follows the S55, which was the high-performance model of the N55 – the predecessor to the B58It featured in varied M-branded automobiles, first showing within the F80 M3 with 444 hpBMW’s S58 engine first appeared in 2019 within the BMW X3 M / Competitors and X4 M / CompetitionThe S58 options bigger valves, a shorter stroke and bigger bore, and a decrease compression ratio than the B58Its displacement is barely decrease (2,993 cc, down from 2,998 cc) however makes extra energy than the B58It makes from 453 hp within the 2024 BMW M2 as much as 560 hp within the restricted version 2023 BMW 3.0 CSL – the CSL is proscribed to 50 items solely
With so many purposes, confirmed reliability, and variants as much as and together with the explosive S58, the B58 household is a supremely adaptable engine for immediately’s demanding sports activities automobiles and extra – probably a future icon within the making.