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Service bulletin B170420

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10177622
Published by NHTSA2020-07-27
Manufacturer's numberB170420
Manufacturer's date2020-06-01
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

COOLANT LEVEL CHECK AND TOP-OFF AT SECOND OIL SERVICE: A new, additional coolant level check task is now linked to the second engine oil service (Service Counter 2 only). The scope of maintenance work will display in ISPA Next that applies to the high-temperature circuit. This new coolant check only pertains to the above listed models with gasoline engines. During the normal operation of the vehicle, there is a certain amount of coolant absorption by the various components/gaskets/seals contained within the coolant systems. Over time, the coolant absorption can cause the coolant level to fall below the maximum fill level in the reservoir. In some cases, the level may even fall low enough to cause the high-temperature circuit low coolant level warning light to illuminate, along with displaying the corresponding Check Control message.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
BMW 530E2018, 2019, 2020
BMW 530I2017, 2018, 2019, 2020
BMW 540D2018, 2019
BMW 540D2020
BMW 540I2017, 2018, 2019, 2020
BMW 640I2018, 2019
BMW 640I2020
BMW 740E2017, 2018, 2019
BMW 740I2017, 2018, 2019, 2020
BMW 740LI2016 to 2017
BMW 745E2020
BMW 750I2018, 2019
BMW 750LI2016 to 2019
BMW 840I2020
BMW B7 ALPINA2018 to 2020
BMW F800 R2017
BMW M550I2017
BMW M550I2018, 2019, 2020
BMW M760I2017, 2018, 2019, 2020
BMW M8 GRAN COUPE2020
BMW M850I2019
BMW M850I2020
BMW M850XI2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
24V5880002024-08-08. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
24V5760002024-08-01. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM:STARTER ASSEMBLY
22V6140002022-08-10. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
21V5980002021-08-02. ENGINE
18V4650002018-07-11. ENGINE AND ENGINE COOLING:ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B1104262026-08-03. Service bulletin. The manual starting of electronic engine oil level measurement from inside the vehicle, usually afterperforming an engine oil service task, is inoperative or it may lock up at between a 15% to 30% completionrate.
B0115242026-08-03. Warranty extension. The NVLD modules limited warranty for defects in materials and/or workmanship has been extended to 15 years / 150,000 miles as determined from the vehicles original in-service / first delivery date.
B0109212026-08-03. Warranty extension. The NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
B0102242026-08-03. Warranty extension. The EVAP systems purge (vent) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in-service / delivery date.
B0113252026-05-18. Warranty extension. The EVAP systems purge (vent) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in-service / delivery date.
B0103242026-05-18. Warranty extension. The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
B0101262026-05-18. Warranty extension. The EVAP systems purge (vent) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in-service / delivery date.
InVehicle-InApp-Comm2026-02-05. Over-the-air update. Service Action: Starter MotorHigh impact energy may cause the circlip for the starter motor pinion positioning to break which may cause the pinion to move in the direction of the starter jaw, causing damage of the starter motor. Also, consequential damage to the flywheel (torsional vibration damper) and transmission may occur.
B0117242025-10-09. Warranty extension. The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the engine’s center fuel injector bore area that resulted after this location was periodically contaminated by engine coolant residue over time. This special program’s coverage is 15 years / 150,000 miles as determined from the vehicle's original in-service / first delivery date.
B0114252025-10-09. Warranty extension. The EVAP systems purge (vent) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in-service / delivery date.