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Engine code

IA Technical Bulletin

BMW N57TU Engine Guide

Engine: N57

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IAIK means IA-insiders knowledge, our collected BMW technical and ownership notes.

N57D30O1 · 2,993 cc · single-turbo common-rail diesel inline-6 · US builds 2013-2018 · 535d and 535d xDrive (F10), 740Ld xDrive (F02), X5 xDrive35d (F15)

The N57TU is BMW's 3.0 liter (2,993 cc) turbocharged inline-six diesel. BMW's training calls it the first redesign of the N57 family and says it is the only N57 available in the US market. It replaced the M57D30T2 diesel that reached the US in 2009 with the E90 335d and E70 xDrive35d.

Fuel goes in through a common-rail system with solenoid injectors, and boost comes from one variable-nozzle turbocharger. The exhaust after-treatment combines a NOx storage catalyst and particulate filter in one housing with an SCR system that doses AdBlue, built for the US ULEV II standard.

Sources show four US applications: the F10 535d and 535d xDrive, the F02 740Ld xDrive and the F15 X5 xDrive35d. BMW's training covers the 535d, 535d xDrive and X5 xDrive35d; the 740Ld xDrive appears in BMW's January 2014 announcement and in the recall records.

IAIK's dossier for this engine is short. Besides the specification table, it covers configuration, service cautions and what to record before ordering parts. It gives no costs, intervals, mileage or tuning figures.

Quick read

Ownership position: IAIK's advice is to record the full engine designation, whether the car is rear-wheel drive or xDrive, and the transmission type before ordering parts.
Reliability: Not established by IAIK as a rating. Two US safety recalls are documented for these cars, one on the high-pressure fuel pump and one on the EGR cooler.
Cost to own: Not established by IAIK; no annual cost figure is given.
Power potential: Not established by IAIK. BMW's factory rating for the US engine is 190 kW / 255 hp and 560 Nm / 413 lb-ft.
Main watch item: High-pressure fuel pump and EGR cooler recall status, checked by VIN.

Where you find it

These are the US-market applications shown by the sources. Build dates are the production windows in BMW's US parts data.

535d (F10), built 07/2013-09/2016
535d xDrive (F10), built 07/2013-10/2016
740Ld xDrive (F02), built 03/2014-05/2015
X5 xDrive35d (F15), built 12/2013-06/2018

NHTSA's recall records give model years for the same cars: 2014-2016 for the 535d and 535d xDrive, 2015 for the 740Ld xDrive, and 2014-2018 for the X5 xDrive35d in the fuel pump campaign.

BMW's training gives start of production as 7/13 for the F10 and 9/13 for the F15. The US X5 type in the parts data starts at 12/2013, and the earliest X5 date in BMW's fuel pump bulletin is December 20, 2013. The sources do not explain the difference.

Outside the US: Not established. BMW's diagnostic documentation groups the N57 technical-update engines by power stage: S1 at 280 kW, T1 at 230 kW and O1 at 190 kW, with a lower U1 stage. The same documentation also defines a second technical update stage; this guide covers only the first. This guide covers only the O1 engine, which is the one BMW's training gives for the US cars.

N57TU At a Glance

Question	Practical answer
Factory output	BMW lists 190 kW / 255 hp at 4,000 rpm and 560 Nm / 413 lb-ft at 1,500-3,000 rpm for the N57D30O1 in its F10 535d xDrive training application. BMW's announcement for the 740Ld xDrive gives the same 255 hp and 413 lb-ft.
Reliability profile	Not established by IAIK as a rating. NHTSA records two safety recalls that apply to these cars by VIN: the high-pressure fuel pump (21V-586) and the EGR cooler (21V-907, which includes cars from the earlier 18V-755).
Best ownership indicator	IAIK says to keep fuel, emissions, cooling and mechanical repair records separate, and to check recall status by VIN because the engine designation alone does not show an open recall.
Typical annual planning budget	Not established by IAIK
Possible first-year catch-up	Not established by IAIK
Largest common repair exposure	Not established by IAIK. The documented campaigns cover the high-pressure fuel pump and the EGR cooler with its intake manifold check.
Common tuned street range	Not established by IAIK
Upgraded-turbo range	Not established by IAIK
Before buying or modifying	IAIK says to review the diesel fuel-filter service history and any high-pressure-pump or injector repairs, to put the DPF soot-load and exhaust back-pressure data and any associated faults in the scan report, and to ask about earlier DPF cleaning or replacement and EGR-related repairs. Confirm rear-wheel drive or xDrive and the transmission type, and check recall status by VIN.

Technical Specifications

Specification	Detail
Configuration	Longitudinal inline-six diesel, one turbocharger, aluminium crankcase, timing chain at the flywheel end.
Engine code	N57D30O1 in IAIK and in BMW's training. D is diesel, longitudinal; 30 is 3.0 liters; O is the upper performance class; 1 is the first redesign. BMW's diagnostic documentation calls stage 1 the first technical update and O the upper power stage.
Displacement	2,993 cc, 84 mm bore x 90 mm stroke
Compression ratio	16.5:1
Power	190 kW / 255 hp at 4,000 rpm
Torque	560 Nm / 413 lb-ft at 1,500-3,000 rpm
Valvetrain	Two camshafts, four valves per cylinder, hydraulic valve clearance adjusters and roller cam followers; two-piece cylinder head with a camshaft carrier plate.
Cylinder head gasket	Three-layer metal gasket sold in three thicknesses, marked by holes: one hole is the thinnest and three holes the thickest.
Crankshaft	Forged C38modBY steel, induction hardened, eight counterweights, seven main bearings, 55 mm main journals and 50 mm rod journals.
Fuel system	Common rail. Bosch CP4.2 twin-piston high-pressure pump and Bosch CRI2.5 solenoid injectors, injection pressure up to 1,800 bar.
Turbocharger	One variable nozzle turbine (VNT) with an electric vane actuator and no wastegate.
Engine management	DDE7.41
Emissions	ULEV II. NOx storage catalyst and diesel particulate filter in one housing, SCR with AdBlue dosing, particulate matter sensor downstream of the SCR.
Engine oil capacity	6.5 liters with a filter element change, listed by BMW for the F02 and F10 with and without all-wheel drive. BMW's February 2017 oil chart lists 6.9 quarts (6.5 liters) for the N57T in the F02, F10 and F15.
Engine oil grade	BMW's February 2017 oil chart lists 0W-30 LL12FE for the N57 in both its model year 2012-2015 and its 2016-and-newer diesel tables. IAIK gives no oil specification for this engine.

The Insider Read

IAIK's starting point is record keeping. A useful N57TU service plan records the complete engine designation, whether the car is rear-wheel drive or xDrive, and the transmission type. IAIK says those distinctions affect sump sealing and the heat-exchanger arrangement. It concludes that an engine-code-only parts list is incomplete.

IAIK's second point is to keep three kinds of evidence apart: fuel-system condition, emissions faults and mechanical repair evidence. It treats metallic fuel contamination, intake deposits, EGR cooling and glow-system faults as distinct issues. Finding metal in the fuel system, IAIK says, needs a diagnosis and a plan for managing the contamination; adding a lubricant is not a substitute.

The recall record fits that habit. NHTSA lists a fuel pump campaign and an EGR cooler campaign for these cars, and BMW handles them as separate repairs under separate bulletins. The engine name alone does not show whether either is open on a given car, and IAIK says to check by VIN.

IAIK gives no reliability rating, costs, service intervals, mileage figures or tuning figures for the N57TU, and this guide does not add any. IAIK's advice comes down to one habit: preserve the fuel, emissions, cooling and mechanical repair records separately.

Factory Deep Dive

US N57TU: common-rail diesel and assembled camshafts

IAIK describes the US-market N57TU as replacing the earlier M57 diesel, with the F10 535d and F15 X5 xDrive35d among its applications. IAIK lists an aluminium crankcase, common-rail solenoid injection and composite camshafts made by the Presta method. IAIK stresses that the camshafts are assembled components rather than single cast shafts. IAIK's values for the N57D30O1 belong to the F10 535d xDrive training application, and IAIK says they should not become a specification row for every N57 variant.

Crankcase, sump and crankshaft

BMW calls the aluminium crankcase a new design based on the N57 crankcase, which was not sold in the US. The reasons BMW gives are extra engine-mount connection points, a moved oil pressure switch, new oil passages for the oil filter module, and higher loads from the extra power.

It is a closed-deck design with dry, thermally joined cast-iron cylinder liners and sintered-metal main bearing caps. A reinforcing plate is bolted to the bottom of the crankcase. BMW says it takes sideways loads at the engine-mount points, for example over a pothole, and that without it the crankcase could break at the mounting points or where the bearing pedestal meets the side wall.

The crankshaft is forged, not cast. BMW says a cast crankshaft would not cope with the loads in this engine. The connecting rods have a shaped small-end bore, which BMW says was already used on the N55 and N47TU.

Technician service notes: RWD sump sealant and xDrive gasket are different arrangements

For the rear-wheel-drive N57TU described in training, the sump flange has an internal chamfer for the excess Loctite 5970 silicone sealing material. The xDrive arrangement uses a physical gasket instead. BMW's training says the silicone is used on the sump and the timing case cover, and refers to the repair instructions for the procedure and torque.

IAIK adds that the chamfer controls where excess sealant is displaced, and that the actual sump and driveline should be verified before following the matching repair instruction for surface preparation, bead placement and torque. IAIK says this is not a universal bead-size or tightening procedure, and that a gasket should not be chosen just because a parts description says N57.

Timing chain at the back of the engine

The chain drive is on the flywheel end of the engine. BMW gives two reasons: a lower front end for pedestrian-impact safety, and lower rotational vibration on the chain because of the transmission's inertia at that end.

A two-section chain system drives the high-pressure pump and camshafts, and a second chain drives the oil and vacuum pump. BMW lists simplex sleeve-type chains, plastic tensioning and guide rails, and hydraulic tensioners. The intake camshaft is chain-driven, and the exhaust camshaft is driven gear-to-gear from the intake camshaft.

Technician service notes: pump timing and camshaft assemblies

BMW's training says the high-pressure pump must be positioned relative to the crankshaft whenever work is done on the chain drive, and it points to the repair instructions for the procedure. It also says the camshaft timing tool goes on the exhaust camshaft only.

IAIK says the Presta construction makes the shaft and cam elements a component assembly, so after a timing-related mechanical failure, setting the external timing reference alone does not show the camshaft assembly is undamaged. It says to assess the head and camshafts with the applicable inspection information before reuse, and notes that its material gives no lobe-alignment tolerance and no complete reuse test.

Oil pump, vacuum pump and crankcase ventilation

A gear-type oil pump and a vane-type vacuum pump form one unit in the sump, together with the reinforcing plate, and both are chain-driven from the crankshaft. BMW gives the oil pump's theoretical delivery as 18.6 cc per revolution, against 16 cc for the N47TU pump.

Crankcase ventilation sends blow-by gas through spring-plate oil separators in the cylinder head and into the clean-air pipe ahead of the turbocharger, at a regulated vacuum of about 38 mbar.

Variable-nozzle turbocharger, no wastegate

One turbocharger with adjustable guide vanes around the turbine wheel does the boosting. An electric actuator moves the vanes on a signal from the engine control unit, and because vane position sets turbine speed and boost, BMW says no wastegate is needed. BMW's 2014 announcement for the 740Ld xDrive describes the same single turbocharger with variable vane technology and no wastegate.

CP4.2 lubrication is part of the fuel path

The CP4.2 high-pressure pump uses fuel flowing through its camshaft chamber and bearing path for lubrication, and IAIK says its roller tappets and pumping elements operate within that fuel-fed system. BMW's training makes the same point plainly: the pump is lubricated by the fuel, so gasoline must not be used as a winter flow improver.

It describes the CP4.2 as a twin-piston pump driven from the crankshaft by the timing chain at 1:1. The pump can generate 2,000 bar, and the N57TU uses 1,800 bar.

IAIK says this explains why fuel condition matters to pump operation, but it does not establish that all US diesel causes a particular internal failure. NHTSA campaign 21V-586, covered under failure point 01, is the documented case: BMW attributes reduced pump lubrication to factors such as fuel quality in the vehicles it recalled. IAIK says fuel condition belongs in the diagnostic record, and that a fuel additive is not a substitute for diagnosing a pressure fault or contamination.

Oil-filter module: distinguish the transmission configuration

The oil-filter module can include a transmission oil-to-coolant heat exchanger on automatic-transmission cars, and BMW's training separately shows the manual-gearbox arrangement. BMW says the same module is used on the N47TU and that only the heat exchanger arrangement differs. On the automatic, BMW says a thermostat opens once the transmission oil reaches 88 °C (190 °F) to let coolant cool the oil, and an auxiliary thermostat lets warm coolant heat the oil once engine coolant reaches 80 °C.

IAIK says the presence of a heat exchanger is configuration-specific, and that a shared housing does not mean engine oil, transmission fluid and coolant are meant to mix or show which fluids will cross-contaminate after a given internal fault. BMW's parts data lists an automatic-transmission service kit for all four US applications, and BMW's announcement gives the 740Ld xDrive an 8-speed automatic. Whether any US car was built with a manual gearbox is not established here.

Intake, EGR and after-treatment

BMW says a NOx storage catalyst replaced the oxidation catalyst used on the earlier US diesel, and that it shares a housing with the particulate filter. A second-generation SCR system doses AdBlue, and a particulate matter sensor downstream of the SCR monitors the filter. BMW says that sensor debuted on the second-generation diesels, the N47TU and N57TU, which reached the US from 7/2013. BMW's 2014 announcement counts no fewer than nine sensors working together in the exhaust gas treatment.

The throttle valve sits at the front of the engine, and the swirl flaps are built into the gasket between the intake manifold and the cylinder head, so a damaged flap no longer means replacing the whole manifold. The N57TU feeds exhaust gas back cooled or uncooled depending on operating temperature, and BMW says it also uses a low-pressure EGR system, especially in heavier vehicles such as the X5.

Technician service notes: swirl-flap gasket, injectors and glow plugs

BMW's training says the swirl flaps must be in the correct position when the gasket is fitted, or they will be damaged when the manifold goes on. Each injector carries a seven-position correction code, and BMW says that after an injector is replaced or swapped, each code must be assigned to the correct cylinder in the engine control unit.

The engine has ceramic glow plugs with a fragile tip, so BMW says to handle them with care. After the glow plugs or the preheating control unit are replaced, BMW says a glow plug identification service function must be run. The parts data lists six Bosch GLP5 glow plugs for each US application.

Known Failure Points and Service Items

Recall information on this page was checked against NHTSA on October 1, 2026. Recalls are added and closed over time, and whether a specific car is covered is a VIN check with BMW or NHTSA.

01 High-pressure fuel pump and recall 21V-586

NHTSA campaign 21V-586 (BMW's report is dated July 29, 2021) covers certain diesel vehicles built with, or fitted during service with, a specific high-pressure fuel pump. BMW says that over time, and because of factors such as fuel quality, pump lubrication can fall, pump parts can wear faster, and metallic shavings can build up inside the pump housing, with a matching deviation in rail pressure. If that continued, a warning lamp would light and pump performance would drop; in rare cases the pump shuts itself down and the engine can stall.

N57TU cars in the campaign: 535d and 535d xDrive, model years 2014-2016 (about 509 vehicles, production June 17, 2013 to July 22, 2016); 740Ld xDrive, model year 2015 (about 13 vehicles, March 10, 2014 to April 14, 2015); X5 xDrive35d, model years 2014-2018 (about 6,389 vehicles, December 20, 2013 to June 30, 2018). The same campaign covers four-cylinder N47 cars, which are outside this guide.

BMW's remedy is to replace the pump with an improved version at no charge to the owner. BMW's bulletin says a dealer should not fit the new pump to a car that cranks but will not start, or that runs poorly with fuel-system faults stored, until technical support has been consulted, because starting the engine can damage the new pump. The bulletin also says most of these cars had an earlier limited warranty extension for the pump; its terms are not established here.

Watch for a fuel-system warning lamp in the instrument cluster, reduced pump performance and rail-pressure deviation, or an engine that stalls. IAIK says to keep the fuel-filter history and any pump or injector repair in the record and, where contamination is suspected, to have the inspecting shop document what was found and where, rather than treating every running complaint as a failed pump. The campaign applies only to cars with the specific pump, so recall status is a VIN check.

02 EGR cooler, intake manifold and recall 21V-907

NHTSA campaign 21V-907 (BMW's report is dated November 19, 2021) covers diesel vehicles with an EGR module that has an integrated cooler. BMW says the cooler can start to leak coolant internally over time, the coolant can mix with soot, and at the high temperatures normally present in the EGR module that can produce smoldering particles. In very rare cases the intake manifold can melt, and in extremely rare cases there can be a fire. BMW says it knew of no accidents or injuries related to the issue when it filed.

N57TU cars in the campaign: 535d and 535d xDrive, model years 2014-2016 (about 7,412 vehicles, production February 12, 2013 to October 24, 2016); 740Ld xDrive, model year 2015 (about 314 vehicles, February 13, 2014 to May 8, 2015); X5 xDrive35d, model years 2014-2017 (about 18,980 vehicles, May 7, 2013 to June 19, 2017). It also covers four-cylinder N47 cars, which are outside this guide.

BMW's dealer bulletins split the work by cooler type. The high-temperature cooler bulletin (SI B11 08 21) lists F10 production February 12, 2013 to October 24, 2016 and F15 production July 12, 2015 to June 30, 2018. The low-temperature cooler bulletin (SI B11 10 21) lists F02 production August 27, 2013 to May 8, 2015 and F15 production August 12, 2013 to June 19, 2017. The windows do not line up exactly with the report: the X5 stops at June 19, 2017 in the report but runs to June 30, 2018 in the high-temperature bulletin, and the 740Ld xDrive starts in February 2014 in the report but August 2013 in the low-temperature bulletin. The documents do not say why, so recall status is a VIN check.

The earlier campaign 18V-755 (filed October 25, 2018; recall began May 13, 2019) covered the same problem on the same models, and NHTSA's record for 21V-907 says it includes all vehicles previously recalled under it. BMW's report says field data showed a limited thermal event on one four-cylinder and one six-cylinder car after the earlier recall was done, which is why it replaced the cooler with an improved design from a new supplier.

BMW's remedy is to replace the EGR cooler and clean the EGR pipe, replace a coolant line, test the intake manifold through its diagnostic system and replace the manifold only if it fails, at no charge to the owner. Cars that had the 18V-755 repair need the new one too.

Watch for a coolant-loss warning in the instrument cluster, reduced engine power, an exhaust smell, an unusual engine noise, or smoke from the engine bay. BMW lists those as the ways a driver may be alerted. IAIK lists EGR cooling with metallic fuel contamination, intake deposits and glow-system faults as distinct issues to diagnose separately.

03 Intake deposits and glow-system faults

IAIK names intake deposits and glow-system faults as separate items from fuel contamination and EGR cooling, and gives no symptom list, mileage or cost for either.

Watch for stored fault information on the affected circuit. IAIK says to document the circuit, the fault information and the inspection findings before ordering components.

04 Diesel particulate filter and after-treatment records

IAIK says the scan report should include diesel particulate filter information: the soot-load and exhaust back-pressure data available for the vehicle, any associated faults, and the technician's interpretation.

Watch for earlier DPF cleaning or replacement and EGR-related repairs. IAIK says to confirm the applicable service schedule, interpret the measurements for that vehicle, and keep the actual diagnostic observations in the purchase record instead of reducing the decision to one mileage number.

Reliability Verdict

IAIK gives no reliability rating for the N57TU, so this guide does not give one either. What the sources establish is short: two documented US safety campaigns, one on the high-pressure fuel pump and one on the EGR cooler, apply to these cars by VIN.

IAIK's advice is to read the fuel, emissions, cooling and mechanical records separately, and not to reduce the buying decision to one mileage number.

Power Potential

Not established by IAIK. The dossier has no tuning figures for the N57TU, and this guide does not estimate any. BMW's factory rating is 190 kW / 255 hp and 560 Nm / 413 lb-ft. BMW's diagnostic documentation lists higher-output N57 power stages, T1 at 230 kW and S1 at 280 kW; those are different engines and are not established as US-market.

Cost of Ownership

Not established by IAIK. The dossier gives no annual cost, no repair cost ranges and no first-year catch-up figure. Where a car is affected and the campaign is open, the fuel pump and EGR cooler repairs are done by BMW dealers at no charge to the owner.