BMW N63

Design

The exhaust manifolds and turbochargers are located between the cylinder banks (on the "inside" of the V8) and the intake manifolds are located on the outside of the engine; this is opposite to the traditional manifold arrangement for a V8 with intakes in the "V" of the engine and the exhaust manifolds on the outside of the engine V. This new design creates a more compact engine package and decreases the exhaust runner length from the exhaust valves to the turbochargers. The engine uses air-to-water intercoolers, which are more efficient and provide a shorter air path than standard front mounted air-to-air intercoolers.

Similar to the N54B30, the original N63B44 and S63 do not use the second generation Valvetronic technology found in current BMW engines. The principal advantage of Valvetronic is the reduction of intake vacuum, which is not an issue in the pressurized intake found in a turbo-charged engine. Valvetronic was finally added to the updated M63TU variant of the engine.

N63B44O0

NOTE: Review additional information in "N63 Customer Care Recall Package" Section on bottom of this page

Applications:

N63B44O1(N63TU)

The N63TU engine is the successor to the N63 that also remedied the many technical issues of the N63 engine before it that are further explained on the bottom of this page in the "N63 Customer Care Recall Package" section. The further developed N63TU engine is the latest fuel-mixture generation technology Turbo Valvetronic Direct Injection TVDI. There are strong similarities here to the N20 or N55 engines. The new engine boasts better performance data at reduced fuel consumption and CO2 emissions.

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N63B44O2 (N63TU2)

The N63TU2 engine replaces the predecessor N63TU. The key enhancements of the N63TU2 over the N63TU are the improved exhaust-gas characteristics, the availability of the engine torque over a wider speed range together with optimized consumption, and a more efficient production process in the plant for the new N63TU2 engine.

The unique selling points of the new N63TU2 engine for the market include innovative detailed solutions such as the internal engine thermal management system during warm-up (called SCC, "Split Cooling Combined", the engine oil/coolant heat exchanger integrated into the engine V, the half-shell intake system and the engine charging using the twin-scroll exhaust turbocharger technology.

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S63 BMW Motorsport Versions

The S63 is BMW's Motorsport division version of the N63, which debuted in the BMW X6 M. The S63 uses two twin-scroll turbochargers plus a pulse tuned, cross-engine exhaust manifold to keep constant exhaust pulses flowing to the turbos at every 180 degree rotation.

S63B44O0

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S63B44T0

A technical update to the S63, known as the S63B44T0, debuted on the F10 M5 sedan. This version uses Valvetronic, a 10:1 compression ratio (compared with 9.3:1 for the non-TU version) and 1.5 bar of boost (compared with 1.3). It is the first BMW M to use Valvetronic.

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S63B44T2

The S63B44T2 debuted on the new generation 2015 X5 M and X6 M models.

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Alpina

Alpina uses a variant of the N63 engine that makes at least 25% more power than the base engine. Compared to the S63, Alpina's first and second variants makes lower horsepower but more torque.

For the 2013 model year, it received Valvetronic like all other N63 engines. Compared to BMW M's version of the 4.4L twin-turbo engine (such as found in the F10 BMW M5), Alpina's engine has 20 hp less but more maximum torque which is also available at a lower RPM.

M1

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M1/1 (M2/1)

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M1/2 (M2/1)

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M2/1

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M2

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M2/2

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N63M30

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The Alpina name is still unknown but the engine is codenamed N63M30 by BMW.

BMW N63 Customer Care Recall Package

On December 29, 2014, BMW released "SI B00 13 14",Recall affecting any vehicle that used the 4.4-liter V-8 (N63B44O0) within the 5 Series, 6 Series, 7 Series, X5, and X6 model lines manufactured between 2008 and 2012. Detailed instruction for the program were given in "SI B11 06 14". Dealership instructions include checking:

Quantity determined after vehicle evaluation

The sweeping program also extended to vehicles that had gone out of warranty, without concern for mileage on the vehicle. As of February 2015, both the US and Canada are implementing this campaign.

Additionally, the service interval would be shortened to nearly half, with a 12 month/10,000 mile (16,000 km) check-up instead of the long-life treatment the BMW had been maintaining up to that point, requiring a check every 2 years and 15,000 miles (25,000 km).

in June 2013, dealerships had received a service bulletin regards to the N63 powerplant, which amended the oil capacity requirements of the engine, adding a full (1) US quart to the capacity of the motor, citing "increased oil consumption" in the twin turbo V8.

Models affected by the recall included:

The dealership bulletin was accompanied by region sales rep meetings with branch/service managers, informing them of the forthcoming campaign, and issuing instructions to contact all owners serviced at their branches operating the N63 engine. The accompanying marketing campaign, which would be a major focus for 2015 of BMW world-wide, was intended to dampen the effect of such a wide spread recall on BMW's waning brand loyalty and customer service issues, the tactics of which could be seen in the extended efforts surrounding the recall.

BMW dealerships were instructed to offer extra incentives for owners affected by this campaign, offering trade-in cash bonuses for their N63 equipped vehicles with the purchase of a new BMW (details in a separate sales bulletin - "N63 Customer Loyalty Offer"). Sales teams were also provided with discretionary authorization to provide customers with a gift of $50 value, including anything from a gas card, gift bag containing BMW Lifestyle products, or vehicle detailing.