Nobody goes looking for a BMW N63 engine for sale on a good day. Usually the X5 or 750i has thrown a warning, there’s blue smoke on start up, the oil light keeps coming on, or a timing chain has let go and taken the valves with it. The car is still worth something, the rest of it is fine, and now you’re weighing up a replacement engine against walking away.
We’re NJ Global Auto Parts. We sell used and rebuilt engines and ship them to buyers all over the world, and the N63 is one we handle often. It’s a brilliant engine when it’s healthy and an expensive one when it isn’t. This page covers the specs, the versions, the cars it fits, the known problems, the checks we make on every BMW N63 engine for sale, pricing and shipping. It’s written plainly, the way we’d explain it to you if you called.
Table of Contents
What You Get With a BMW N63 Engine for Sale
The N63 is BMW’s 4.4 litre twin turbo V8. It came out in 2008 and was the first production engine to put the turbos inside the V of the engine, which BMW calls a hot vee layout. The exhaust manifolds run into the middle of the engine, the two turbos sit right there, and the whole thing is compact and very responsive.
It has an aluminium block and heads, direct injection, double VANOS variable cam timing and, from the updated versions onward, Valvetronic variable valve lift. It makes big, smooth power from low revs. In a heavy X5 or 7 Series it feels effortless.
The downside of the hot vee is heat. A lot of heat sits right on top of the engine, and over the years that cooks seals, hoses and gaskets. That’s behind most of the problems you’ll read about, and it’s why the condition of any BMW N63 engine for sale matters so much more than the mileage alone.
The BMW N63 page has a full list of versions and the cars they went into. For buying, the details below are the ones that matter.
BMW N63 Engine for Sale: Full Specifications
The N63 went through several updates. The table shows the core specs, and the next section breaks down the versions. Every BMW N63 engine for sale we list is matched against this before it’s quoted.
| Engine family | N63 (N63B44) |
| Layout | 90 degree V8, twin turbo, petrol |
| Displacement | 4,395 cc (4.4 L) |
| Bore x stroke | 89.0 mm x 88.3 mm |
| Block and heads | Aluminium |
| Valvetrain | DOHC per bank, 32 valves, double VANOS. Valvetronic on N63TU onward |
| Turbos | Two, mounted inside the V (hot vee) |
| Fuel system | High precision direct injection |
| Timing drive | Chain |
| Compression ratio | 10.0:1 (N63), 10.5:1 (later versions) |
| Power | 300 to 390 kW (407 to 530 PS), depending on version |
| Torque | 600 to 750 Nm, depending on version |
| Fuel | Premium unleaded (95 RON minimum, 98 preferred) |
| Oil capacity | Roughly 8.5 L with filter, depending on model |
N63 Versions Explained
This is important. When someone offers a BMW N63 engine for sale, you need to know which version it is, because they are not all interchangeable.
N63 (N63B44O0), 2008 to about 2013. The original. About 300 kW (407 PS) and 600 Nm. No Valvetronic. This is the version with the worst reputation for oil use, timing chains and injectors, and many have had updates done under BMW programs.
N63TU (N63B44O1), about 2012 onward. The first big update. Valvetronic added, revised turbos, cooling, chains and electronics. About 330 kW (450 PS) and 650 Nm. Noticeably better than the first engine.
N63TU2 (N63B44O2), about 2015 onward. Further updates, used in cars like the G11/G12 750i. Around 330 to 340 kW.
N63TU3 (N63B44T3), about 2018 onward. The strongest non-M version, used in M50i and M550i type models. About 390 kW (530 PS) and 750 Nm.
The later versions fixed a lot of the original’s issues. They also use different wiring, electronics and cooling layouts, so you can’t just drop one into a car built for another.
Which Cars Use the N63
You’ll find the N63 in BMW’s big sedans, coupes and SUVs, including:
- BMW X5 xDrive50i (E70, F15, G05) and X5 M50i
- BMW X6 xDrive50i (E71, F16, G06) and X6 M50i
- BMW 750i and 750Li (F01/F02, G11/G12)
- BMW 550i (F10) and 550i Gran Turismo (F07)
- BMW M550i (G30)
- BMW 650i (F12, F13, F06)
- BMW M850i (G14, G15, G16)
- BMW X7 xDrive50i and M50i (G07)
- Some Alpina models based on these cars
Fitment depends on the chassis code, the year and whether the car is rear or all wheel drive. We always ask for your VIN before confirming a BMW N63 engine for sale will fit. You can check model details on the BMW site for your region.
Used, Rebuilt or Long Block?
Here’s what the three main options mean when you look at a BMW N63 engine for sale.
Used complete engine. Comes out of a donor car with turbos, injectors, wiring and most accessories on. The cheapest option, but on an N63 the donor’s history matters a lot. A low mileage engine that has been parked for years can have its own problems.
Long block. Block, heads, cams, chains, without most of the bolt-on parts. You move your turbos, injectors and accessories over. It only makes sense if your parts are in good shape.
Rebuilt engine. Opened up and rebuilt with new chains and guides, valve stem seals, gaskets, bearings and whatever else is needed. On the original N63 this is often the smartest choice, because it fixes the known weak spots before they fail. It costs more upfront.
Our guide on rebuilt vs used engines explains the trade-offs in more detail.
7 Checks We Make on Every BMW N63 Engine for Sale
The N63 punishes guesswork. These are the checks we make before we’re happy to put our name on a BMW N63 engine for sale.
1. Engine Number, Version and Donor Car
We confirm the engine code and version, record the engine number, and note the donor car, year, VIN and mileage where available. On this engine, knowing the exact version is essential.
2. Compression and Leak-Down on All Eight Cylinders
We test every cylinder for compression and, where needed, leak-down. Uneven readings point to valve or ring problems. A chain failure often shows up as bent valves and very low compression.
3. Timing Chains and Guides
We check the chains for stretch and look at the guides for cracked or broken plastic. Stretched chains on the N63 can lead to cam timing faults and, in the worst case, valve damage. Engines with chain problems get rebuilt or don’t go out.
4. Oil Consumption Signs
Worn valve stem seals are a known cause of oil burning on the N63, especially the early engines. We look for oil on the valves and in the ports with a scope, and we look for smoke on start up when the engine is run.
5. Turbos and Oil Lines
We check the turbos for shaft play and oil leaks, and look at the oil and coolant lines in the V. Heat makes these lines brittle over time, and a leak there can cause smoke and fire risk.
6. Injectors, Coils and Cooling
We check for injector leakage and signs of misfire, look at the coil packs and check the coolant pipes and the valley for leaks. The coolant pipes in the V are a common failure point.
7. What’s Included
We list exactly what’s on the engine: turbos, injectors, coils, high pressure pumps, wiring, sensors, accessories. That list comes with every BMW N63 engine for sale we quote.
Common N63 Problems You Should Know About
The N63 has a reputation, and some of it is deserved. Here are the main issues so you can judge any BMW N63 engine for sale properly.
Oil consumption. Usually from valve stem seals hardened by heat. The early N63 was worst for this. New seals fix it.
Timing chain stretch. Guides and chains wear, especially with long oil change intervals. Fault codes for cam timing and a rattle on start are early signs.
Injectors. Early piezo injectors had problems with leaking and misfires. Many were replaced with updated parts.
Turbo oil and coolant lines. Heat in the V ages these lines. Leaks can cause smoke and drips on the exhaust.
Valve cover gaskets and coolant pipes. Common leak points that get worse as the engine ages.
Battery and electrical load. Not the engine itself, but low battery voltage causes all sorts of odd faults on these cars. Always check it before blaming the engine.
Does Your BMW Really Need a New Engine?
Before you buy a BMW N63 engine for sale, get a proper diagnosis. Many N63 problems can be fixed with the engine in the car or with the engine out but not replaced.
Blue smoke on start up and slow oil use often means valve stem seals. Misfires can be coils, plugs or injectors. Coolant loss can be pipes in the V. Rattle and timing fault codes mean chains, which is a big job but not always a new engine.
If compression is low, the chain has jumped, or a turbo failure has sent debris through the engine, replacement becomes the sensible option. On a well kept X5 or 7 Series, putting in a good BMW N63 engine for sale is still far cheaper than replacing the car.
How to Tell a Good BMW N63 Engine for Sale From a Bad One
These are the things we look at, and what you should ask to see.
Version and VIN. Ask for the engine code and the donor VIN. If they don’t know which version it is, move on.
Service history. On the N63, oil change frequency matters more than on almost any other engine. An engine that had oil changed every 10,000 km or so is a much better bet than one that went 25,000 km between changes.
Updates done. Ask whether valve stem seals, chains or injectors were replaced. A BMW N63 engine for sale with the known jobs already done is worth more.
Cold start video. Watch for smoke and listen for chain rattle in the first few seconds.
Scope photos. Photos of the valves and bores tell you a lot about oil use and wear.
Price. An unusually cheap BMW N63 engine for sale almost always has a reason. Find it before you pay.
N63 or S63: Don’t Mix Them Up
We get this question a lot. The S63 is the M version of this engine, used in the X5 M, X6 M, M5 and M6. It shares the same basic hot vee idea and the 4.4 litre size, but it’s built for more power with different internals, turbos, cooling and electronics. An S63 is not a straight replacement for an N63, and the other way around. If someone offers you a cheap S63 for your 550i, or an N63 for your M5, be careful. Check the engine code on the block and the VIN of the donor before you go any further.
Parts Worth Replacing While the Engine Is Out
On most cars, you’d fit the engine and move on. On an N63, it’s worth spending a bit more while everything is apart, because getting back in there later costs a lot in labour. Workshops who fit these regularly will usually suggest some or all of these:
- Turbo oil feed and return lines, plus the coolant lines to the turbos
- Coolant pipes and seals in the valley of the engine
- Valve cover gaskets and the vacuum lines around the top of the engine
- Spark plugs and any tired coil packs
- Engine mounts, which take a beating from the torque
- Thermostat and auxiliary water pump if they’re original
None of these are expensive on their own. Doing them now protects your investment in the replacement. When we quote a BMW N63 engine for sale, we can quote these parts with it if you want everything arriving in one shipment.
Buying for a Workshop
A lot of our N63 buyers are independent BMW specialists. If you do these swaps regularly, we can hold stock for you, ship more than one unit to lower freight costs, and keep test records and photos for each BMW N63 engine for sale so you can hand them to your own customer. Tell us how many you fit in a typical month and we’ll talk pricing.
What Affects the Price of a BMW N63 Engine for Sale
- Version. Later versions like the N63TU and TU3 cost more than early N63 engines.
- Used or rebuilt. A rebuilt engine with new chains and seals costs more but fixes the known problems.
- Mileage and history. Lower mileage with good service records is worth paying for.
- How complete it is. Turbos, injectors and wiring add a lot of value.
- Freight. Your location and how fast you need it will change the final cost.
We quote the engine, what’s included and freight together. You can see current stock on the BMW N63 engine product page, the BMW N63B44 listing, and all our BMW engines.
Shipping a BMW N63 Engine for Sale Worldwide
We ship to buyers in Europe, the Americas, the Middle East, Africa, Asia and the Pacific. Every engine is drained, sealed, crated or strapped to a pallet, and wrapped to keep it clean and dry. Turbo and intake openings are capped.
Sea freight is the cheaper option and suits most buyers. Air freight is faster if your car is needed back quickly. We’ll price both if you ask.
Each BMW N63 engine for sale ships with a commercial invoice and packing list. Duties and taxes depend on your country, so check with a customs broker before it lands. The World Customs Organization has general guidance. Our shipping policy and billing terms explain our side.
Fitting Tips From BMW Specialists
Installing a BMW N63 engine for sale is a serious job. It’s usually done by removing the engine from underneath with the front subframe, or from the top depending on the car and the workshop. Either way, these steps help:
- Replace the turbo oil feed and return lines and coolant pipes in the V while you can reach them.
- Fit new spark plugs and check the coil packs.
- Flush the cooling system and check the electric water pump and radiator.
- Change oil and filter before first start and prime the oil system.
- Check the battery and charging system. Low voltage causes false faults.
- Code and adapt the engine with proper diagnostic software after installation.
- Run it to temperature, check for leaks and clear any stored faults before a road test.
Looking After the N63 Once It’s Running
Whether you buy a used or rebuilt BMW N63 engine for sale, how you treat it afterwards decides how long it lasts.
- Change the oil much more often than the long service intervals some cars show. Every 8,000 to 10,000 km is a common rule among specialists.
- Use BMW approved oil in the right grade.
- Let the engine warm up before hard driving.
- After a hard run, let it idle for a minute before switching off to help the turbos cool.
- Keep an eye on coolant level and oil level.
- Deal with small leaks early before heat makes them worse.
What Happens When the Engine Arrives
Check the crate before you sign for it. If it’s damaged or wet, take photos with the driver there and note it on the paperwork. After unpacking, match the engine number to your quote and check every part on the included list. Look closely at the wiring, sensors and turbo inlets, which are the most likely parts to get knocked in transit. If anything is wrong, send us photos straight away. We keep inspection photos of every BMW N63 engine for sale we ship, which makes sorting out any problem quicker.
Questions to Ask Before You Pay for a BMW N63 Engine for Sale
- Which version is it, and what was the donor VIN?
- What were the compression readings on all eight cylinders?
- Have the chains, valve stem seals or injectors been replaced?
- Can I see a cold start video and scope photos?
- Exactly what is included?
- What warranty comes with it and what are the conditions?
- How will it be packed and what will freight cost?
Other Engines We Supply
If you came for a BMW N63 engine for sale but work on other European cars too, have a look at these:
- BMW N63B44 engine product page
- BMW N63B44 common problems and reliability
- BMW M62 V8 for older X5, 540i and 740i models
- BMW M54B30 inline six
- Mercedes-Benz M277 V12 and more in our Mercedes range
You’ll find everything in our used engines section.
Why Buy From NJ Global Auto Parts
With an engine like the N63, the wrong purchase can cost you twice. We try to make sure that doesn’t happen. Every engine is checked, photographed and described honestly, including the version and any known issues. If we don’t think an engine is right for your car, we’ll say so.
Read more about us, our refund and returns policy, or browse the shop. There are more guides on the blog.
Frequently Asked Questions
Is the BMW N63 a reliable engine?
The later versions are much better than the original. With frequent oil changes and the known weak spots dealt with, an N63 can run a long time.
Can I fit an N63TU into a car that had the original N63?
It’s not a simple swap. Wiring, electronics and cooling differ. It’s usually better to stay with the same version.
Does the N63 use a timing chain?
Yes, chains. They need good oil and regular changes to last.
Is your BMW N63 engine for sale used or rebuilt?
We offer both, and every quote says which.
Does it come with a warranty?
Yes. Terms depend on used or rebuilt and are written on your quote.
Do you ship to my country?
Very likely. We ship worldwide by sea and air and quote freight before you pay.
A BMW N63 engine for sale is a big purchase, and it should come with a clear version, real test results and a seller who answers your questions straight. That’s what we aim for. Send your VIN through the contact page, tell us where you are, and we’ll come back with what we have and a delivered price.