# Service bulletin B651915

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: 10147555
- Published by NHTSA: 2018\-11\-13
- Manufacturer's number: B651915
- Manufacturer's date: 2016\-07\-01
- NHTSA component: EQUIPMENT

## NHTSA's summary

XM SATELLITE RADIO RECEPTION This Service Information bulletin supersedes SI B65 19 15 dated December 2015.. INFORMATION Currently Satellite Radio is provided by SiriusXM for BMW customers. SiriusXM is the only company currently broadcasting Satellite Radio in North America. Satellite radio was broadcast from two different sets of Satellites using different earth orbits. XM uses geosynchronous \(GEO\) satellites located roughly above the equator. This means that the satellite signal to some parts of the United States can come in at an angle as low as 32 degrees to the horizon. This is different than Sirius Satellites in a Highly Elliptical Orbit \(HEO\) which came in to the vehicle at a higher angle to the horizon. As of April 2016 Sirius equipped head units moved to the XM Satellites constellation and now show the same location based cutouts. SiriusXM is currently updating the repeater network to cover areas of low reception, but the general disadvantage of geostationary satellites can't be compensated completely. Buildings, hills, trees, highway sound blocking walls or any other obstacles might block the satellite signal coming from the south at a 32 degree elevation angle might cause audio cut outs in absence of terrestrial repeaters. Reception quality decreases the further north you travel, as the angle of the incoming signal gets flatter. Adverse weather conditions will affect reception. Sirius XM will increase the amount of Sirius and XM repeaters gradually to improve situation in metropolitan areas. When investigating Satellite Radio cutouts or a temporary loss of reception: Please compare to a similarly equipped vehicle. Keep in mind the roofline of the vehicle, size of the antenna \(sharkfin\) and location of the antenna on the vehicle will all affect the strength of the reception. Do not compare a Sport Activity Vehicle \(SAV\) with a high roofline mounted antenna to a different vehicle such as a coupe or convertible with a much lower mounting point of the antenn

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10147555-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10147555-0001.pdf)

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

## Components

Equipment and accessories

## Vehicles listed

- BMW K SERIES

JSON: [/v1/bulletins/10147555](/v1/bulletins/10147555)

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