G26 · 2021–…

BMW 420d Gran Coupé G26 · 190 hp (since 2021)

The 420d Gran Coupé is the four-cylinder diesel: 140 kW (190 hp) with 48-volt mild hybrid, rear-wheel drive or xDrive. To check this is your version, compare with the 140 kW on the registration document. An oil change takes 5.5 l.

Choose an engine

Identify the car and prepare its maintenance

Technical specifications

Fuel
Diesel
Power
190 PS / 140 kW
Displacement
1 995 cm³
Torque
400 Nm
Cylinders
4
Engine code
B47 (B47D20B)
Period covered
2021–…
Documented market
Europe

Transmission

  • Automatic · 8 speeds · 2021

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

Specification source : [4] BMW Group [7] BMW Group

What distinguishes this version

1,995 cc four-cylinder diesel with 48-volt mild hybrid (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. 420d: 7.3 s, 235 km/h; 420d xDrive: 7.6 s, 233 km/h (06/2021 and 07/2024 sheets). Since 2024, latest-generation particulate filter and SCR catalyst, Euro 6e. ADAC codes this engine B47D20B in the Coupé.

Source : [4] [7] [6] [10]

Engine oil: quantity

Oil change: 5.5 l according to BMW’s specification sheets (06/2021, 07/2024). Approvals and viscosity grades: see the “B47 engine” block on this page.

Source : [4] [7]

What the service display tracks

Due dates are calculated by Condition Based Service from how the car is used. BMW’s regular maintenance covers engine oil, brake fluid, a vehicle check, air filter, cabin microfilter and fuel filter, each triggered by the calculated service requirement. BMW’s list sets no mileage or period: the reference is the date your car displays.

Source : [1]

Prepare the next service

Check the power on the registration document (140 kW) and note the items and dates the car displays. Ask for 5.5 l of a BMW-approved oil. Have the VIN checked against the recalls listed by ADAC and keep a record of every job.

Source : [10] [4]

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 : [19] [20] [12] [25] [26] [18]

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 : [16] [17] [27] [13] [22] [23] [19] [20] [12] [21] [26]

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 : [25] [14] [15]

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 : [24]

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 : [19] [11] [12] [25] [26]

Maintenance and records

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]

Questions about this version (5)

Rear-wheel drive or xDrive?

Same engine and oil quantity (5.5 l); BMW quotes 7.3 s and 235 km/h with rear-wheel drive, 7.6 s and 233 km/h with xDrive. Both remain in the July 2024 line-up.

Source : [4] [7]

Does it need AdBlue?

Yes. The 4 Series diesels use an SCR catalyst with AdBlue injection (Coupé press kit), and BMW lists a latest-generation SCR catalyst on the diesel Gran Coupé models from 2024. Top it up when the car asks and at each service.

Source : [2] [6]

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. (These rules come from the Coupé handbook, which shares the same engines.)

Source : [8] [9]

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 : [10]

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 : [8]

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 06/2021 — The all-new BMW 4 Series Gran Coupé (press kit, long version)

    BMW Group · EN · Europe (German base data) · p. 2 (model variants at launch), pp. 4–6 (Munich plant, market launch November 2021, dimensions, boot 470–1,290 l) · Accessed 08/10/2026

  4. [4] BMW Media information 06/2021 — Technical specifications, the all-new BMW 4 Series Gran Coupé

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

  5. [5] 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

  6. [6] BMW Media information 04/2024 — The new BMW i4 and the new BMW 4 Series Gran Coupé (long version)

    BMW Group · EN · Europe (German base data) · p. 2 (model variants), pp. 3–4 (Munich plant, market launch July 2024), pp. 18–19 (Steptronic Sport, engines, Euro 6e) · Accessed 08/10/2026

  7. [7] Technical data — BMW 4 Series Gran Coupé, valid as of July 2024

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

  8. [8] 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

  9. [9] 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

  10. [10] 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

  11. [11] 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

  12. [12] 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

  13. [13] 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

  14. [14] 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

  15. [15] 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

  16. [16] 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

  17. [17] 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

  18. [18] 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

  19. [19] 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

  20. [20] 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

  21. [21] 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

  22. [22] 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

  23. [23] 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

  24. [24] 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

  25. [25] 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

  26. [26] 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

  27. [27] 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

We use cookies to measure audience and improve your experience. Learn more