# 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.

- Type: Service bulletin
- NHTSA id: 10177622
- Published by NHTSA: 2020\-07\-27
- Manufacturer's number: B170420
- Manufacturer's date: 2020\-06\-01
- NHTSA component: ENGINE 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177622-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177622-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2018 to 2020 BMW 530E
- 2017 to 2020 BMW 530I
- 2018 to 2019 BMW 540D
- 2020 BMW 540D
- 2017 to 2020 BMW 540I
- 2018 to 2019 BMW 640I
- 2020 BMW 640I
- 2017 to 2019 BMW 740E
- 2017 to 2020 BMW 740I
- 2016 to 2017 BMW 740LI
- 2020 BMW 745E
- 2018 to 2019 BMW 750I
- 2016 to 2019 BMW 750LI
- 2020 BMW 840I
- 2018 to 2020 BMW B7 ALPINA
- 2017 BMW F800 R
- 2017 BMW M550I
- 2018 to 2020 BMW M550I
- 2017 to 2020 BMW M760I
- 2020 BMW M8 GRAN COUPE
- 2019 BMW M850I
- 2020 BMW M850I
- 2019 BMW M850XI

## Recalls for the same vehicles and component

- [24V588000](/recalls/nhtsa/24V588000.md), 2024-08-08: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\)
- [24V576000](/recalls/nhtsa/24V576000.md), 2024-08-01: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ELECTRICAL SYSTEM:STARTER ASSEMBLY
- [22V614000](/recalls/nhtsa/22V614000.md), 2022-08-10: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\)
- [21V598000](/recalls/nhtsa/21V598000.md), 2021-08-02: ENGINE
- [18V465000](/recalls/nhtsa/18V465000.md), 2018-07-11: ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [B110426](/bulletins/11035500.md), 2026-08-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. 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.
- [B011524](/bulletins/11035499.md), 2026-08-03, Warranty extension: ENGINE. 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.
- [B010921](/bulletins/11035498.md), 2026-08-03, Warranty extension: ENGINE. 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.
- [B010224](/bulletins/11035496.md), 2026-08-03, Warranty extension: ENGINE. 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.
- [B011325](/bulletins/11032733.md), 2026-05-18, Warranty extension: ENGINE. 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.
- [B010324](/bulletins/11032731.md), 2026-05-18, Warranty extension: ENGINE. 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.
- [B010126](/bulletins/11032729.md), 2026-05-18, Warranty extension: ENGINE. 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\-Comm](/bulletins/11028295.md), 2026-02-05, Over\-the\-air update: ENGINE. 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.
- [B011724](/bulletins/11024203.md), 2025-10-09, Warranty extension: ENGINE. 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.
- [B011425](/bulletins/11024202.md), 2025-10-09, Warranty extension: ENGINE. 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.

JSON: [/v1/bulletins/10177622](/v1/bulletins/10177622)

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