BMW N47 320d 120d 520d Head Gasket Keychain

The BMW N47 is a four-cylinder, common-rail turbodiesel engine family developed by BMW as the successor to the M47 diesel. It was produced from March 2007 through roughly 2014-2017 depending on displacement and market, and was itself succeeded by the B47 from 2014. The family spans two displacements: the N47D16 at 1.6 litres (1,598 cc) and the N47D20 at 2.0 litres (1,995 cc), both inline-four (row/R4) configurations with DOHC 16-valve aluminium cylinder heads. Internally, sub-codes such as N47D20A, N47D20O0, N47D20U0, N47D20T1 (twin-turbo "N47S") and N47D20C denote specific production tranches and power outputs, each tied to distinct running-change dates.

A defining and widely reported engineering trait is the rear-mounted timing chain — positioned on the transmission side of the engine rather than the front — which requires substantial disassembly (including engine removal in many cases) for inspection or replacement. This detail is frequently underreported in generic spec sheets but is central to the engine's reputation among buyers and mechanics, and is a gap worth covering explicitly since many competitor product listings omit it

Vehicle Compatibility Matrix

The N47 was fitted across BMW's compact, mid-size, and SUV ranges, plus MINI and select PSA (Peugeot/Citroën) models under license. Because reported chassis fitment varies slightly between sources, the table below consolidates the most consistently corroborated applications; some peripheral fitments (e.g. Z4 E89, 7 Series F01/F02) appear on fewer sources and should be treated as less certain.

BMW/MINI Model	Chassis Code(s)	Badge Variants	Production Years
1 Series	E81, E82, E87, E88, F20, F21	114d, 116d, 118d, 120d, 123d	2007–2015
2 Series	F22, F23	218d, 220d, 225d	2013–2015
3 Series	E90, E91, E92, E93, F30, F31, F34	316d, 318d, 320d, 325d	2007–2015
4 Series	F32, F33, F36	418d, 420d, 425d	2013–2015
5 Series	E60, E61, F07, F10, F11	518d, 520d, 525d	2007–2015
X1	E84, F48	sDrive16d/18d/20d, xDrive18d/20d/23d	2009–2015
X3	E83, F25	18d, 20d, xDrive20d	2007–2017
X5 / X6 (some markets)	F15, F85 (parts listings)	25d, 30d	Limited, per parts
MINI Cooper SD / Countryman / Paceman	R55, R56, R57, R58, R59, R60, R61	Cooper SD	2010–2016
Peugeot/Citroën (BMW-sourced diesel)	3008, 5008, C4 Picasso, C5	2.0 HDi variants	2008–2012

Note: some sources also cite the 2014–2016 US-market 328d and X3 xDrive28d as using an updated N47TU before the switch to B47; this claim appears on fewer independent sources and should be flagged as needing further verification before publishing as fact.

Why This Engine Matters

The N47 was one of BMW's highest-volume diesel engines of the 2007–2014 era, powering everything from entry-level 116d hatchbacks to 520d executive saloons and X3 SUVs, making it one of the most commonly encountered used-BMW diesel engines in the UK market today. Its cultural footprint is defined less by motorsport pedigree and more by its notorious rear timing chain failure, which became a landmark cautionary tale in BMW ownership circles and generated a large secondary market of specialist repairers and diagnostic guides. BMW issued running changes in 2009 and again around 2011 aimed at reducing (but not eliminating) the failure rate, meaning enthusiasts and buyers still actively track production dates and chassis codes when assessing risk.

Technical Specifications

Bore × stroke (N47D20): 84.0 mm × 90.0 mm; the 1.6-litre N47D16 uses a shorter-stroke 78.0 mm × 83.6 mm layout.
Compression ratio: 16.5:1 across most variants (16.1:1 on the 150 kW twin-turbo N47S).Cylinder block: Closed-deck aluminium block with cast-iron liners, forged steel crankshaft, forged connecting rods, and two balancer shafts.motorxpertisehub+1
Valvetrain: DOHC, 16 valves (4 per cylinder), with a rear-mounted timing chain rather than the more common front-mounted arrangement.
Power range: From 70 kW (94–95 hp) on the base N47D16 up to 160 kW (218 PS) on the twin-turbo N47D20T1 (N47S).
Torque range: 235 Nm on the smallest unit up to 450 Nm on the flagship twin-turbo variant.
Fuel system: Bosch common-rail direct injection; solenoid injectors at up to 1,600 bar on lower-power units, piezo injectors at up to 2,000 bar on higher-output variants.
Forced induction: Single variable-geometry turbo (VGT) on most variants; sequential twin-turbo layout on the range-topping N47S.
Emissions: Euro 5 as standard, with Euro 6-compliant later revisions.

Variant	Displacement	Power	Torque	Production Window
N47D16	1,598 cc	70 kW (94–95 hp)	235 Nm	2012–2015
N47D16	1,598 cc	85 kW (114–116 hp)	260 Nm	2012–2015
N47D20 (base)	1,995 cc	85 kW (114–116 hp)	260 Nm	2007–2014
N47D20	1,995 cc	105 kW (141–143 hp)	300 Nm	2007–2014
N47D20	1,995 cc	120–135 kW (163–184 hp)	350–380 Nm	2008–2016
N47D20T1 (N47S, twin-turbo)	1,995 cc	160 kW (218 PS)	450 Nm	2011–2015

Discrepancies exist between sources on exact kW/PS figures for mid-range variants (e.g. 130 kW vs 135 kW readings for the same nominal output), likely reflecting rounding differences between metric and imperial conversions or minor running changes; buyers should confirm exact output via the vehicle's specific chassis and build date rather than engine code alone.

Common Failure Points Beyond the Timing Chain

While the rear timing chain dominates N47 discourse, documented secondary issues include EGR valve faults triggering limp mode, DPF regeneration problems from short urban journeys, and turbocharger wear on high-mileage examples. Diagnostic trouble codes P0016, P0017, and P0018 (cam-crank correlation errors) are the standard indicators of timing chain stretch and warrant specialist inspection before any purchase decision. Preventive timing chain replacement in the used-diesel aftermarket typically runs from roughly £1,700 to £2,600 (converted from reported €2,000–€3,000), rising substantially if failure has already occurred and damaged internal components.

Product Relevance for Gasket Keys

For an N47-specific head gasket keychain, the product should reference the engine's actual head gasket footprint tied to the 84.0 mm bore/90.0 mm stroke 2.0-litre block or the smaller 78.0 mm bore 1.6-litre block, since these differ physically between the D16 and D20 families. Given the engine's strong association with reliability discourse (particularly the timing chain saga) among UK BMW diesel owners, marketing copy can credibly position the keychain as a tribute to an engine "every BMW diesel owner has an opinion about," which differentiates messaging from generic BMW diesel keychains that ignore this well-documented context.

Frequently Asked Questions

What if I don't know my exact BMW N47 engine code?
Check the engine code stamped on the block near the timing chain housing, or look up the chassis code and model year, since N47D16 relates to 116d/118d-class 1.6-litre applications while N47D20 covers most 2.0-litre 118d through 525d and X3/X1 diesel applications.

Is every N47-powered BMW at risk of timing chain failure?
The failure risk is highest on engines built between March 2007 and January 2009, with BMW's 2009 and 2011 running changes reducing but not eliminating the issue on later production dates.

Which BMW models most commonly used the N47 diesel?
The 1 Series (E81/E87/F20), 3 Series (E90/F30), 5 Series (E60/F10), X1 (E84), and X3 (E83/F25) account for the vast majority of N47-equipped vehicles sold in the UK.

N47 2.0 Diesel – BMW 320d, 120d & 520d Head Gasket Keychain