G22/G23 · 2020–…

BMW 420d Coupé/Convertible G22/G23 · 190 hp (since 2020)

The 420d is the four-cylinder diesel of the 4 Series Coupé and Convertible: 140 kW (190 hp), 400 Nm and a 48-volt mild hybrid, available from launch. To check this is your version, compare with the 140 kW on the registration document. An oil change takes 5.5 l.

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Technical specifications

Fuel
Diesel
Power
190 PS / 140 kW
Displacement
1 995 cm³
Torque
400 Nm
Cylinders
4
Engine code
B47 (B47D20B)
Period covered
2020–…
Documented market
Europe

Transmission

  • Automatic · 8 speeds · 2020

Figures apply to the cited configuration and market; equipment and transmissions may vary by production date.

Specification source : [2] BMW Group [3] BMW Group [6] BMW Group [9] BMW Group [10] BMW Group

What distinguishes this version

1,995 cc four-cylinder diesel (ADAC: B47D20B) with two-stage turbocharging, 2,500 bar common-rail injection, SCR catalyst with AdBlue and a 48-volt starter-generator (8 kW/11 hp boost): 140 kW (190 hp) at 4,000 rpm, 400 Nm between 1,750 and 2,500 rpm. Eight-speed Steptronic. Coupé with rear-wheel drive (7.1 s, 240 km/h) or xDrive (7.4 s, 238 km/h); Convertible with rear-wheel drive only (7.6 s, 236 km/h). The VI/20 handbook allows a braked trailer of 1,600 kg (420d) or 1,800 kg (420d xDrive).

Source : [2] [3] [6] [13] [14] [11]

Engine oil: quantity

Oil change: 5.5 l according to BMW’s specification sheets (06/2020, 03/2021, 01/2024). Approvals and viscosity grades: see the “B47 engine” block on this page. The top-up list in the 4 Series handbook depends on the edition (VI/20 or X/23, see the generation page). The level is measured electronically: car level, engine warm and running, CAR › Vehicle status › Engine oil level › Oil level measurement › Start measurement. Only add oil when the car asks for it, in the quantity given in the message.

Source : [3] [6] [9] [10] [11]

What the service display tracks

The car calculates each due date from how it is used (Condition Based Service) and briefly shows the next date or remaining distance after switching on; details, including statutory inspections, are under CAR › Vehicle status › Service requirements, and completed work under Service History. BMW’s regular maintenance covers engine oil, brake fluid, a vehicle check, air filter, cabin microfilter and fuel filter. Brake fluid and, where applicable, oil and microfilter also depend on time. Neither the handbook nor BMW’s list sets a mileage or period.

Source : [11] [1]

Prepare the next service

Check the power on the registration document (140 kW). Note the items and dates shown under CAR › Vehicle status › Service requirements. Give the service advisor the key the car was last driven with: the car stores its service data in it. Ask for 5.5 l of a BMW-approved oil. Have the VIN checked against the starter recalls listed by ADAC, then check that the work is entered in the electronic Service History, which a later owner can also view.

Source : [11] [13] [3]

BMW B47 diesel engine (2.0 l, four-cylinder)

This applies to every car fitted with the B47 engine.

What the B47 is

Inline four-cylinder diesel engine of 1,995 cc (84 mm bore, 90 mm stroke) with common-rail direct injection and turbocharging. Codes published by BMW: B47D20U0 (218d), B47D20O0 (220d) and B47D20T0 (225d) in the 2017 facelifted 2 Series; B47C20U1 (118d) and B47C20O1 (120d xDrive) in the 2019 F40 1 Series. ADAC codes the 48 V mild-hybrid version (140 kW/190 PS, 400 Nm) of the 2020 facelifted G30 520d and the 2022 G42 220d Coupé as B47D20B.

Source : [24] [25] [17] [30] [31] [23]

Engine oil

BMW handbooks only list oils for topping up and leave the oil change to a qualified workshop; the list depends on the handbook edition. 2 Series Active Tourer F45 handbook (II/17): BMW Longlife-04, or Longlife-12 FE for certain diesels only, in SAE 0W-40, 0W-30, 5W-40 or 5W-30; otherwise up to 1 litre of ACEA C3. F45 facelift handbook (VI/19) / 5 Series G30 handbook (VI/20): BMW Longlife-04 or -12 FE — the handbook adds that Longlife-12 FE is not suitable for the 25d, 35d, 40d and 50d diesels — in SAE 0W-30, 5W-30, 0W-40 or 5W-40 (0W-20 and 5W-20 are excluded for diesels); otherwise up to 1 litre of ACEA C2 or C3. 1 Series F40 handbook (II/22): BMW Longlife-04 or -12 FE, in SAE 0W-30, 5W-30, 0W-40 or 5W-40; otherwise up to 1 litre of ACEA C2 or C3. 2 Series Coupé G42 handbook (VI/22) / Active Tourer U06 handbook (X/24): BMW Longlife-12 FE or -17 FE+, in SAE 0W-20 or 0W-30 only; otherwise up to 1 litre of ACEA C2 or C5. No additives. Quantities published by BMW: 5 l for the B47D20U0, O0 and T0 (2017 2 Series, “filling quantity”); 5.5 l for the B47C20U1 and O1 of the F40 1 Series (oil-change quantity) and for an oil change on the G42 220d Coupé (2021). No quantity is sourced here for other installations.

Source : [21] [22] [32] [18] [27] [28] [24] [25] [17] [26] [31]

Timing drive

Chain, according to ADAC. BMW’s training documents on the modular family explain that, because the crankcase is shared by petrol and diesel engines, the timing drive is two-part: a lower chain drives an intermediate shaft, which on the diesels also drives the high-pressure pump, and an upper chain drives the camshafts. The sources consulted give no replacement interval.

Source : [30] [19] [20]

Recall campaign

In October 2018 BMW expanded a technical campaign on the EGR module of certain diesels: glycol leaking from the EGR cooler, combined with soot deposits, can create smouldering particles and, very rarely, melt the intake manifold or cause a fire. About 1.6 million vehicles worldwide, built August 2010 to August 2017, with periods varying by model; the module is checked and faulty parts replaced. BMW does not list engine codes, so have the VIN checked.

Source : [29]

What changed over the years

2017: facelifted 2 Series with B47D20U0/O0/T0. 2019: B47C20 in the F40 1 Series, Euro 6d-TEMP — two turbochargers of different sizes (variable-geometry low-pressure stage, high-pressure stage integrated into the manifold), slide bearings, 2,500 bar injection, single-stage exhaust gas recirculation, particulate filter, NOx adsorption catalyst and AdBlue SCR. 2020: 48 V mild hybrid (B47D20B according to ADAC) in the facelifted 520d, Euro 6d-ISC-FCM, then in the G42 220d Coupé.

Source : [24] [16] [17] [30] [31]

Maintenance and records

Engine oil (2020 handbook)

Due date calculated by CBS

Oil change at the date the car displays, without running past it; BMW recommends having it done by a workshop. Top-up oils in the VI/20 handbook: petrol BMW Longlife-04, -12 FE or -17 FE+; diesel Longlife-04 or -12 FE (-12 FE is not suitable for the 25d, 35d, 40d and 50d diesels). Viscosities SAE 0W-20, 5W-20, 0W-30, 5W-30, 0W-40 or 5W-40, with 0W-20 and 5W-20 excluded for diesel. If unavailable, up to 1 litre of ACEA C2 or C3. No additives.

Source [11]

Engine oil (2024 handbook)

Due date calculated by CBS

Oil change at the date the car displays. Top-up oils in the X/23 handbook: petrol BMW Longlife-12 FE, -17 FE+ or -19 FE (without a petrol particulate filter, BMW prefers Longlife-01 FE to -12 FE); diesel Longlife-12 FE or -17 FE+. Viscosities SAE 0W-20 or 0W-30 only. If unavailable, up to 1 litre of ACEA C2 or C5. No additives.

Source [12]

Other maintenance items — diesel

As the service requirement dictates

BMW lists as regular maintenance: brake fluid, a vehicle check to BMW specifications, air filter, cabin microfilter and fuel filter. Each item is triggered by the service requirement the car calculates.

Source [1]

Time-based items

Calendar-based (CBS)

Brake fluid and, where applicable, engine oil and the microfilter/activated-carbon filter also depend on time. The VI/20 handbook states that periods with the battery disconnected are not taken into account: have the workshop update these items. The handbook gives no period.

Source [11]

AdBlue

At the reserve warning

Yellow reserve warning: add at least 5 litres; tank empty: at least 15 litres, or the car will not restart once switched off. BMW recommends having it topped up during regular maintenance; one top-up between services is usually enough. Below −5 °C it may need topping up more often; below −11 °C, only add it just before driving off.

Source [11]

Coolant

Regular check, engine cold

Level correct at the Max mark in the expansion tank filler neck, engine cold and air conditioning off. BMW recommends coolant to BMW LC-18, mixed 50:50 with water; do not mix additives of different colours. At delivery or after a workshop visit the tank may be overfilled: the normal level settles with use.

Source [12]

Soft top (Convertible)

Every wash; impregnate every 3–5 washes

Do not open the roof when wet, snow-covered, iced or dirty, and do not leave it open for more than a day while damp. Clean it with a dedicated soft-top cleaner, never with stain remover, thinner, solvent or petrol. After three to five washes, treat it with an impregnating agent. It is not designed to carry a roof rack.

Source [33]

Questions about this version (5)

Does the 420d need AdBlue?

Yes. The SCR system injects AdBlue into the exhaust. At the yellow reserve warning, add at least 5 litres; if the tank runs empty, at least 15 litres, or the car cannot be restarted once switched off. BMW recommends having it topped up during regular maintenance.

Source : [2] [11]

Is the 420d Convertible available with xDrive?

Not in the BMW documents we read: the 03/2021 and 01/2024 Convertible sheets list the 420d with rear-wheel drive only, while the Coupé comes with both. ADAC still lists the 420d xDrive Coupé after the 2024 update.

Source : [6] [10] [9] [15]

Which fuel?

EN 590 diesel with up to 7% biodiesel (B7); B10 as the minimum; paraffinic diesel to EN 15940 (XTL) is allowed. Never pure methyl ester or petrol. BMW recommends using only diesel additives rated as suitable.

Source : [11] [12]

Which recalls can apply to this version?

ADAC lists three BMW starter recalls covering this generation of the 4 Series: October 2025 (built 09/2015–09/2021), February 2026 (05/2020–10/2024) and July 2026 (07/2020–02/2026). A relay poorly protected against water, or wear deposits in it, can cause a short circuit and a fire; the starter is replaced. Not every car is affected: have your VIN checked.

Source : [13]

How should a new car of this version be run in?

Up to 2,000 km, do not exceed 3,500 rpm or 150 km/h, avoid full load and kick-down and do not use Launch Control; then increase gradually. New tyres need a gentle approach for the first 300 km, the brakes for about 500 km. The same rules apply after these parts are replaced.

Source : [11]

Documentary sources

  1. [1] BMW Service Inclusive — Die Leistungen (bmw.de, archived 15/04/2026)

    BMW AG · DE · Germany · Section “Die Leistungen von BMW Service Inclusive” · Accessed 08/10/2026

  2. [2] BMW Media information 06/2020 — The new BMW 4 Series Coupé (press kit, long version)

    BMW Group · EN · Europe (German base data) · p. 2–3 (model variants at launch), p. 13 (Dingolfing, launch October 2020), pp. 23–28 (engines, 48V mild hybrid, eight-speed Steptronic, xDrive) · Accessed 08/10/2026

  3. [3] BMW Media information 06/2020 — Technical specifications, the new BMW 4 Series Coupé

    BMW Group · EN · Europe (German base data) · 420i, 430i, M440i xDrive, 420d, 420d xDrive: output, torque, engine oil (oil change), performance, emission rating · Accessed 08/10/2026

  4. [4] BMW Group Plant Dingolfing, 1 July 2020 — Start of production for new BMW 4 Series Coupé

    BMW Group · EN · Europe (German base data) · p. 1 · Accessed 08/10/2026

  5. [5] BMW Media information 09/2020 — The all-new BMW 4 Series Convertible (press kit, long version)

    BMW Group · EN · Europe (German base data) · pp. 2–3 (model variants), p. 4 (launch March 2021, Dingolfing), pp. 10–11 (panel bow soft top, 18 s, 50 km/h, boot 300/385 l) · Accessed 08/10/2026

  6. [6] Specifications of the BMW 4 Series Convertible, valid from 03/2021

    BMW Group · EN · Europe (German base data) · 420i, 430i, M440i xDrive, 420d Convertible: output, torque, engine oil (oil change), performance, emission rating · Accessed 08/10/2026

  7. [7] BMW model update measures for spring 2023 (press release)

    BMW Group · EN · Europe (German base data) · Section “BMW 4 Series and BMW M4 now with BMW Operating System 8 and BMW Curved Display” (March 2023) · Accessed 08/10/2026

  8. [8] BMW Media information 01/2024 — The new BMW 4 Series Coupé and the new BMW 4 Series Convertible (long version)

    BMW Group · EN · Europe (German base data) · pp. 2–4 (model variants), p. 13 (Dingolfing, launch March 2024), pp. 15–16 (powertrain, Steptronic Sport, 48V mild hybrid) · Accessed 08/10/2026

  9. [9] BMW Media information 01/2024 — Technical specifications, the new BMW 4 Series Coupé

    BMW Group · EN · Europe (German base data) · 420i to M440d xDrive Coupé: output, torque, engine oil (oil change), performance, emission rating · Accessed 08/10/2026

  10. [10] BMW Media information 01/2024 — Technical specifications, the new BMW 4 Series Convertible

    BMW Group · EN · Europe (German base data) · 420i to M440d xDrive Convertible: output, torque, engine oil (oil change), performance, emission rating · Accessed 08/10/2026

  11. [11] BMW 4er Coupé (G22) Betriebsanleitung, Sach-Nr. 01405A11254 – VI/20 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · pp. 175–176 (Servicebedarf, Service Historie), 330–331 (Einfahren, Partikelfilter), 380–382 (Kraftstoff, AdBlue), 386–390 (Motoröl, Kühlmittel), 392–393 (CBS), 415–418 (Gewichte, Anhängelasten) · Accessed 08/10/2026

  12. [12] BMW 4er Coupé (G22) Betriebsanleitung, Sach-Nr. 01405A9A824 – X/23 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · pp. 353–354 (Kraftstoffqualität), 360–361 (Motorölsorten), 362 (Kühlmittel), 365 (Condition Based Service, Standzeiten) · Accessed 08/10/2026

  13. [13] ADAC Autokatalog — BMW 420d Coupé Steptronic (10/20 - 01/24)

    ADAC · DE · Germany · Technische Daten: Motorcode, Leistung, Drehmoment, Hubraum, Antriebsart, Nockenwellensteuerung, Modellstart/-ende, Schadstoffklasse; Rückrufe & Mängel · Accessed 08/10/2026

  14. [14] ADAC Autokatalog — BMW 420d Coupé xDrive Steptronic (10/20 - 01/24)

    ADAC · DE · Germany · Technische Daten: Motorcode, Leistung, Drehmoment, Hubraum, Antriebsart, Nockenwellensteuerung, Modellstart/-ende, Schadstoffklasse; Rückrufe & Mängel · Accessed 08/10/2026

  15. [15] ADAC Autokatalog — BMW 420d Coupé xDrive Steptronic (ab 03/24)

    ADAC · DE · Germany · Technische Daten: Motorcode, Leistung, Drehmoment, Hubraum, Antriebsart, Nockenwellensteuerung, Modellstart/-ende, Schadstoffklasse; Rückrufe & Mängel · Accessed 08/10/2026

  16. [16] BMW Media information 05/2019 — The all-new BMW 1 Series (press kit)

    BMW Group · EN · Europe (ACEA) · PDF p. 2 (launch dates), pp. 13–14 (xDrive, limited-slip differential), pp. 16–20 (engines, transmissions) · Accessed 08/10/2026

  17. [17] BMW UK Technical data — The all-new BMW 1 Series (118i, M135i xDrive)

    BMW (UK) Ltd. · EN · United Kingdom · Basic data summary (engine description B38A15M1 / B48A20T1); Motor: “Engine oil (exchange quantity)” · Accessed 08/10/2026

  18. [18] BMW 1er (F40) Betriebsanleitung, Sach-Nr. 01405A54108 – II/22 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · p. 182 (Servicebedarf), pp. 349–357 (Kraftstoff, AdBlue, Motoröl, Kühlmittel), pp. 360–361 (Condition Based Service, Service Historie) · Accessed 08/10/2026

  19. [19] BMW Technical training — B46 Engine (with the B38 three-cylinder)

    BMW of North America — Technical training (archive.org copy) · EN · USA · Information status June 2014 · §1 (B38/B46, “Bx8”) · §2.2.7 Chain drive, Bx8 engines (pp. 57–58) · Accessed 08/10/2026

  20. [20] BMW Technical training — B58 Engine

    BMW of North America — Technical training (archive.org copy) · EN · USA · Information status April 2015 · §1.2 Modular design · §1.3 Technical data (engine oil specification) · §2.2.4 Chain drive · Accessed 08/10/2026

  21. [21] BMW 2er Active Tourer (F45) Betriebsanleitung, Sach-Nr. 01402978274 – II/17 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · p. 96 (Servicebedarf), pp. 214–215 (Kraftstoffqualität), pp. 231–234 (Motoröl), pp. 235–236 (Kühlmittel), pp. 237–238 (Condition Based Service, Service Historie) · Accessed 08/10/2026

  22. [22] BMW 2er Active Tourer (F45) Betriebsanleitung, Sach-Nr. 01402666468 – VI/19 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · pp. 140–141 (Servicebedarf), pp. 270–273 (Kraftstoff, AdBlue), pp. 295–298 (Motoröl), pp. 299–300 (Kühlmittel), pp. 301–302 (Condition Based Service, Service Historie) · Accessed 08/10/2026

  23. [23] BMW parts catalogue (ETK) — BMW 2 Series F45 Active Tourer, Europe: model and engine list

    bmwfans.info (copy of the BMW ETK parts catalogue) · EN · Europe · Model, Engine: 214d/216d B37, 216i/218i B38, 218d/220d (and xDrive) B47, 220i/225i/225i xDrive B48, 225xe B38X · Accessed 08/10/2026

  24. [24] BMW UK Technical data — 2 Series Coupé LCI [F22LCI]

    BMW Group UK · EN · United Kingdom · Effective production week 44/2017 · engine type (B58B30M0, B47D20U0, B47D20O0, B47D20T0), gearbox, “Engine oil (filling quantity)” · M2 Coupé LCI · Accessed 08/10/2026

  25. [25] BMW UK Technical data — 2 Series Convertible LCI (F23LCI)

    BMW Group UK · EN · United Kingdom · Effective production week 44/2017 · engine type (B38B15M0, B48B20M0, B48B20O0, B58B30M0, B47D20U0, B47D20O0, B47D20T0), gearbox, “Engine oil (filling quantity)” · Accessed 08/10/2026

  26. [26] BMW Technical specifications 07/2021 — BMW 2 Series Coupé (220i, M240i xDrive, 220d)

    BMW Group · EN · Europe (ACEA) · pp. 1–6; “Engine oil”, footnote 2) “Oil change”; 48V mild hybrid output and battery (220d); consumption WLTP combined · Accessed 08/10/2026

  27. [27] BMW 2er Coupé (G42) Betriebsanleitung, Sach-Nr. 01405A5E757 – VI/22 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · pp. 157–158 (Servicebedarf), 260–261 (Einfahren, Partikelfilter), 278 (Segeln), 311–315 (Kraftstoff, AdBlue), 316–321 (Motoröl, Kühlmittel), 322–323 (CBS, Service Historie), 326–328 (Batterie, Mild-Hybrid), 347–351 (Gewichte, Anhängelasten) · Accessed 08/10/2026

  28. [28] BMW 2er Active Tourer (U06) Betriebsanleitung, Sach-Nr. 01405B553E0 – X/24 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · pp. 170–171 (Service), 334 (Einfahren), 350–351 (Rekuperation, Segeln), 389–394 (Kraftstoff, AdBlue), 394–399 (Motoröl, Kühlmittel), 401 (CBS, Service Historie), 405–408 (Batterie, Mild-Hybrid), 412–413 (Starthilfe), 425–431 (Technische Daten) · Accessed 08/10/2026

  29. [29] BMW — élargissement de la campagne EGR, 23/10/2018

    BMW Group · EN · Europe / marchés ACEA · Page 1 : fuite glycol, suie, risque thermique ; périodes variables selon modèle, contrôle et remplacement des composants concernés. · Accessed 08/10/2026

  30. [30] ADAC Autokatalog — BMW 520d Steptronic (07/20 – 05/23)

    ADAC · DE · Germany · Technische Daten: Motorart, Motorcode, Leistung, Drehmoment, Schadstoffklasse, Abgasreinigung, Aufladung, Nockenwellensteuerung, Hubraum · Accessed 08/10/2026

  31. [31] ADAC Autokatalog — BMW 220d Coupé Advantage Steptronic (01/22 – 06/22)

    ADAC · DE · Germany · Technische Daten: Motorart, Motorcode, Leistung, Drehmoment, Schadstoffklasse, Abgasreinigung, Aufladung, Nockenwellensteuerung, Hubraum · Accessed 08/10/2026

  32. [32] BMW 5er Limousine (G30) Betriebsanleitung, Sach-Nr. 01405A11307 – VI/20 (online copy)

    BMW AG · DE · Germany · pp. 405–406: Motorölsorten zum Nachfüllen, geeignete und alternative Motorölsorten, Viskositätsklassen (Fußnote zu Longlife-12 FE und Dieselmotoren 25d/35d/40d/50d) · Accessed 08/10/2026

  33. [33] BMW 4er Cabrio (G23) Betriebsanleitung, Sach-Nr. 01405A9A8D8 – X/23 (online copy)

    BMW AG (online copy: Kfz-Handbuch.de) · DE · Germany · pp. 106–110 (Verdeck: Hinweise, Funktionsvoraussetzungen, manuelles Schließen), 389 (Verdeck reinigen und imprägnieren) · Accessed 08/10/2026

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