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B47D20B47C20

B47 114-150 hp, single turbo (2014-) engine: faults and reliability

BMW B47 (B47D20 / B47C20) version

With caution

Shares with the rest of the B47 family the documented risk of EGR cooler failure and, to a lesser extent, of timing chain failure.[1][2]

Years
since 2014
Power
114–150 hp
Faults that affect it
4
3 of high or critical severity
Cars that use it
7
in our database

9 sourcesHow we work

What changes in this version

Entry-level outputs of the B47 range, with a single turbo and factory power of 114 and 150 hp depending on market and model.[3]

Engine codes of this version: B47D20, B47C20.

Faults of the B47D20 engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1Critical severityFrequency: Very frequentEmissions controlEGR cooler leaks with risk of engine fireYes: the EGR valve cooler can suffer internal coolant leaks which, mixed with soot and oil, can reach combustion temperatures; BMW has launched several technical campaigns since 2018 to inspect and replace it because of the risk of engine fire.Repair (garage): €500–€1,500
  2. 2High severityFrequency: OccasionalTimingTiming chain wear (improved, but is it really at the front?)BMW improved the chain's tensioner, guides and oil supply compared with the N47, and failures take much longer to appear. But a specialist workshop insists the chain is still at the rear of the block, not at the front as is often claimed, so repairing it still means removing the engine or the gearbox.
  3. 3High severityFrequency: OccasionalTurboPremature turbo wear from neglected maintenanceThe B47's turbo does not have a design flaw as well documented as the N47's, but it can wear out early if oil changes are not respected, with repairs that usually run at around €1,000 to €2,000.Repair (garage): €1,000–€2,000
  4. 4Medium severityFrequency: CommonEmissions controlParticulate filter (DPF) clogging in urban useYes: as on most modern diesels, the B47's particulate filter can clog with soot in cars used in town on short journeys, with cleaning or replacement costing from €500 to €1,800 depending on the condition of the filter.Repair (garage): €500–€1,800

Cars fitted with the B47D20 engine

Open each car to see all its faults with this engine and what to check before buying it.

BMW

Frequently asked questions

Is the B47D20 engine reliable?

Our verdict is “With caution”. Shares with the rest of the B47 family the documented risk of EGR cooler failure and, to a lesser extent, of timing chain failure.[1][2]

What faults does the B47D20 engine have?

The documented ones that affect this version, by importance: EGR cooler leaks with risk of engine fire (critical severity), timing chain wear (improved, but is it really at the front?) (high severity), premature turbo wear from neglected maintenance (high severity) and particulate filter (DPF) clogging in urban use (medium severity).

Which cars use the B47D20 engine?

BMW Serie 1 F20 (2014–2019), BMW Serie 1 F40 (since 2019), BMW Serie 3 F30 (2014–2019), BMW Serie 3 G20 (since 2019), BMW X1 F48 (2015–2022), BMW Serie 2 Active Tourer U06 (since 2022) and BMW X1 U11 (since 2022).[3][4][5][6][7][8][9]

Are you buying a car with the B47D20 engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. 324.000 diésel de BMW tendrán que pasar por el taller en Europa, por un posible riesgo de incendio en la EGRDiariomotor · Motoring press · published 8 August 2018 · consulted 26 September 2026 · in Spanish
  2. Motor BMW B47 - Reparación EspecializadaDasercars · Technical documentation · consulted 26 September 2026 · in Spanish
  3. BMW B47Wikipedia (inglés) · Other source · consulted 26 September 2026
  4. Motor BMW B47: problemas, modelos y qué revisarCarexam · Motoring press · consulted 26 September 2026 · in Spanish
  5. BMW 1 Series (F20)Wikipedia · Other source · consulted 29 October 2026
  6. BMW 3 Series (G20)Wikipedia · Other source · consulted 29 October 2026
  7. BMW X1 (F48)Wikipedia · Other source · consulted 29 October 2026
  8. BMW 2 Series Active Tourer (U06)Wikipedia · Other source · consulted 29 October 2026
  9. BMW X1 (U11)Wikipedia · Other source · consulted 29 October 2026