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BMW N63 engine
Manufacturer BMW, Bayerische Motoren Werke AG
Production 2008-
Combustion chamber
Configuration 90° V8
Predecessor BMW N62

The BMW N63 is a twin turbo DOHC V8 piston engine which replaced the (naturally aspirated) N62. It was launched in the 2008 BMW X6 xDrive50i,[1] and later the F01 BMW 750i.[2] The location of the intake and exhaust manifolds are reversed compared to a traditional V8. The BMW Motorsport division version of this engine, called S63, debuted in the X5M and X6M and later appeared in the M5 and M6. Alpina also uses a variant of this engine in its B5 Bi-Turbo, B6 Bi-Turbo and B7 Bi-Turbo.


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;[3] 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.[4] 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.[1]

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.

N63 Versions[edit]

Engine Displacement Power Torque Redline Bore Stroke Year
N63B44O0 4,395 cc (268 cu in) 300 kW (410 PS) @ 5500-6400 600 N·m (440 lb·ft) @ 1750-4500 6500 89 mm 88.3 mm 2008-2012
N63B44O1 330 kW (450 PS) @ 5500-6000 650 N·m (480 lb·ft) @ 2000-4500 6500 89 mm 88.3 mm 2012-
N63B44O2 330 kW (450 PS) @ 5500-6000 650 N·m (480 lb·ft) @ 1800-4500 6500 89 mm 88.3 mm 2015-
S63B44O0 408 kW (555 PS) @ 6000 680 N·m (500 lb·ft) @ 1500-5650 7000 89 mm 88.3 mm 2009-
S63B44T0 412 kW (560 PS) @ 6000-7000 680 N·m (500 lb·ft) @ 1500-5750 7200 89 mm 88.3 mm 2011-
S63B44T2 423 kW (575 PS) @ 6000-6500 750 N·m (550 lb·ft) @ 2200-5000 7200 89 mm 88.3 mm 2015-


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



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.


N63B44O2 (N63TU2)[edit]

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.


S63 BMW Motorsport Versions[edit]

The S63 engine cover

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[3] to keep constant exhaust pulses flowing to the turbos at every 180 degree rotation.




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).[5] It is the first BMW M to use Valvetronic.


  • 2011–present F10 M5
  • 2012–present F12/13 M6
  • 2013–present F06 M6 Gran Coupe


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



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.[6]

Engine Displacement Power Torque Compression ratio Bore Stroke Year
M1 4,395 cc (268 cu in) 373 kW (507 PS; 500 hp) @ 5500 700 N·m (520 lb·ft) @ 3000-4750 9,2:1 89 mm 88.3 mm 2009-2012
M1/1 397 kW (540 PS; 532 hp) @ 5200-6250 730 N·m (540 lb·ft) @ 2800-5000 2011-2015
M2, M2/1 10,0:1
M2/2 441 kW (600 PS; 591 hp) @ 6000 800 N·m (590 lb·ft) @ 3500-4500 2015-
? (N63M30) 447 kW (608 PS; 599 hp) @ 5750-6250 800 N·m (590 lb·ft) @ 3000-5000 2016-



  • 2009–2012 Alpina B7 Bi-Turbo: based on the BMW F01 7 Series[7][8]
  • 2010–2011 Alpina B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series

M1/1 (M2/1)[edit]


  • 2012–2014 Alpina B5 Bi-Turbo Sedan/Touring: based on the BMW F10/F11 5 Series[9]

M1/2 (M2/1)[edit]


  • 2011–2015 Alpina B6 Bi-Turbo Coupé/Cabrio: based on the BMW F12/F13 6 Series[9]



  • 2014–2015 Alpina B6 Bi-Turbo Gran Coupé: based on the BMW F06 6 Series[10]





  • 2015 Alpina B5 Bi-Turbo Edition 50 Sedan/Touring: based on the BMW F10/F11 5 Series[12]
  • 2015–2016 Alpina B6 Bi-Turbo Edition 50 Coupé/Cabrio: based on the BMW F12/F13 6 Series[12]
  • 2016 Alpina B5 Bi-Turbo: based on the BMW F10/F11 5 Series
  • 2016–present Alpina B6 Bi-Turbo: based on the BMW F06/F12/F13 6 Series[12]



The Alpina name is still unknown but the engine is codenamed N63M30 by BMW.[13]

  • 2016–present Alpina B7 Bi-Turbo: based on the BMW G12 7 Series
  • 2017–present Alpina B5 Bi-Turbo: based on the BMW G30/G31 5 Series

BMW N63 Customer Care Recall Package[edit]

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:

  • Hot-Film Air Mass Sensors (2)
  • PIEZO High Pressure fuel injectors (8)
  • Engine vacuum pump (1)
  • Fuel System Low Pressure Sensor (1)
  • Fresh Air Intake Turbo Seals (2)
  • Crankcase Ventilation Lines (Hoses)
  • Timing Chain Inspection Measure

Parts replaced on every affected vehicle[edit]

Part number Description Quantity
13 62 8 645 877 Hot-film air mass sensor 2
13 71 8 646 450 Gasket (Intake air duct) 2
17 51 7 585 577 Clamp 2
11 15 8 645 237 Connecting line bank 1 1
11 15 8 645 238 Vent pipe bank 1 1
11 15 8 645 239 Connecting line bank 2 1
11 15 8 645 240 Vent pipe bank 2 1

Quantity determined after vehicle evaluation[edit]

Part number Description Quantity
11 66 8 649 747 Vacuum pump As needed up to 1
13 53 8 648 937 Piezo injector (this part number is index 11 or greater) As needed up to 8
13 53 8 651 060 Decoupling element As needed up to 8
13 53 8 649 966 Fuel feed line with low pressure sensor As needed up to 1

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:

  • F01 and F02 (7 Series Sedan)– produced from 3/2009 to 6/2012
  • F04 (Active Hybrid 7)– produced from 4/2010 to 6/2012
  • F07 (Gran Turismo)– produced from 9/2009 to 6/2012
  • F10 (5 Series Sedan)– produced from 3/2010 to 7/2013
  • F12 (6 Series Convertible)– produced from 3/2011 to 7/2012
  • F13 (6 Series Coupe)– produced from 7/2011 to 7/2012
  • E70 (X5)– produced from 3/2010 to 6/2013
  • E71 (X6)– produced from 7/2008 to 6/2014
  • E72 (ActiveHybrid X6)– produced from 9/2009 to 9/2011

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.


  1. ^ a b BMW X6 Full Details, Specifications and Photos
  2. ^ New BMW 7-Series (F01) Specifications and Photos
  3. ^ a b
  4. ^
  5. ^
  6. ^ "Archived copy". Archived from the original on 2012-10-24. Retrieved 2012-10-07. 
  7. ^ Noah Joseph RSS feed. "Geneva 2009: An M7 by any other name - 2009 BMW Alpina B7 Bi-Turbo". Retrieved 2012-06-05. 
  8. ^ "2011 BMW Alpina B7 First Drive". Motor Trend. 2010-05-19. Retrieved 2012-06-05. [permanent dead link]
  9. ^ a b Burgan, Richard (27 March 2015). "Alpina B5 Bi-Turbo et B6 Bi-Turbo Edition 50 : 100 unités, 600 chevaux" (in French). Retrieved 29 June 2015. 
  10. ^ a b Quiroga, Tony (May 2014). "2015 BMW Alpina B6 xDrive Gran Coupe - First Drive Review". Car & Driver. Retrieved 29 June 2015. 
  11. ^ Vaughn, Mark (7 July 2014). "To The Max". Autoweek. 64 (14): 22–23. 
  12. ^ a b c Ramey, Jay (6 April 2015). "Celebrate Alpina's 50th at 204 mph". Autoweek. Retrieved 29 June 2015. 
  13. ^ "Road Vehicle Descriptor (RVD1)". Retrieved 2016-11-24. 

External links[edit]