# Service bulletin 0503\-18

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: 10151485
- Published by NHTSA: 2018\-12\-10
- Manufacturer's number: 0503\-18
- Manufacturer's date: 2018\-05\-03
- NHTSA component: EQUIPMENT; ENGINE

## NHTSA's summary

0503\-18 Relative Cylinder Compression Test

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10151485-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10151485-0001.pdf)

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

## Components

Engine, Equipment and accessories

## Vehicles listed

- 2014 FREIGHTLINER 114SD
- 2016 to 2018 FREIGHTLINER 114SD
- 2014 FREIGHTLINER 122SD
- 2016 to 2018 FREIGHTLINER 122SD
- 2014 FREIGHTLINER BUSINESS CLASS M2
- 2016 to 2018 FREIGHTLINER BUSINESS CLASS M2
- 2014 FREIGHTLINER CASCADIA
- 2016 to 2018 FREIGHTLINER CASCADIA
- 2014 WESTERN STAR 4700
- 2016 to 2018 WESTERN STAR 4700
- 2014 WESTERN STAR 4900
- 2016 to 2018 WESTERN STAR 4900
- 2014 WESTERN STAR 5700
- 2016 to 2018 WESTERN STAR 5700
- 2014 WESTERN STAR 6900
- 2016 to 2018 WESTERN STAR 6900

## Recalls for the same vehicles and component

- [2020408](/recalls/tc/2020408.md), 2020-09-01: Engine
- [20V527000](/recalls/nhtsa/20V527000.md), 2020-09-01: ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING
- [18V581000](/recalls/nhtsa/18V581000.md), 2018-08-30: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2017636](/recalls/tc/2017636.md), 2017-12-18: Accessories
- [17V810000](/recalls/nhtsa/17V810000.md), 2017-12-15: EQUIPMENT
- [17V452000](/recalls/nhtsa/17V452000.md), 2017-07-17: EQUIPMENT
- [16V416000](/recalls/nhtsa/16V416000.md), 2016-06-09: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2016285](/recalls/tc/2016285.md), 2016-06-06: Engine
- [16V143000](/recalls/nhtsa/16V143000.md), 2016-03-09: EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:ELECTRICAL
- [15V816000](/recalls/nhtsa/15V816000.md), 2015-12-07: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

## Other bulletins for the same vehicles and component

- [FleetCom\_SS 3163\-FTL](/bulletins/11026453.md), 2025-12-06, Other: ENGINE. Fleet Communications for Power Steering Reservoir Fill Cap Venting
- [CXA 3\_25\_NOx](/bulletins/11016309.md), 2025-04-02, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 2\_25\_Turbo Oil Drain](/bulletins/11014819.md), 2025-03-04, Other: ENGINE. CX Advocate for turbo oil drain cracking
- [CXA 2\_25\_NOx](/bulletins/11014818.md), 2025-03-04, Other: ENGINE. CX Advocate for NOx conversion low faults
- [MYCOM\_02102025\-1](/bulletins/11014786.md), 2025-03-04, Other: ENGINE. My Communications for Variable Speed Coolant Pump for DD13 Engines \- Cascadia/57X Only
- [CXA 1\_16\_Turbo Oil Drain](/bulletins/11013206.md), 2025-01-29, Other: ENGINE. CX Advocate for turbo oil drain cracking
- [CXA 1\_16\_NOx](/bulletins/11013204.md), 2025-01-29, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 1\_16\_GATS2.4](/bulletins/11013201.md), 2025-01-29, Other: ENGINE. CX Advocate for GATS2.4 being expanding to DD15
- [CXA 1\_16\_DD13 Altitude](/bulletins/11013199.md), 2025-01-29, Other: ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
- [CXA 1\_16\_CARB Truck Chec](/bulletins/11013196.md), 2025-01-29, Other: ENGINE. CX Advocate for CARB tightening the Readiness Criteria applied to On\-Board Diagnostic \(OBD\) test submissions for the Clean Truck Check.

JSON: [/v1/bulletins/10151485](/v1/bulletins/10151485)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%200503-18&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10151485&vehicle=Service%20bulletin%200503-18)