# Service bulletin 03\-003\-18\-3519

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: 10145249
- Published by NHTSA: 2018\-10\-09
- Manufacturer's number: 03\-003\-18\-3519
- Manufacturer's date: 2018\-09\-20
- NHTSA component: EQUIPMENT; POWER TRAIN; ENGINE

## NHTSA's summary

Some vehicles may exhibit an oil leak from the companion flange area \(A\) of the transfer unit. This concern may be caused by companion flange oil seal wear. The oil seal has been improved to increase the wear resistance.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10145249-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10145249-0001.pdf)

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

## Components

Engine, Equipment and accessories, Transmission and driveline

## Vehicles listed

- 2013 to 2016 MAZDA CX\-5

## Other bulletins for the same vehicles and component

- [SA\-041\-26](/bulletins/11034447.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This SA supersedes the previously issued SA\(s\) listed below. The changes are noted in Red. SA\-061/25 12/17/25 DESCRIPTION If you encounter any type of electrical concern \(e.g, dead battery, engine no start, DTC\(s\) stored...\), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC\-2 \(battery discharge/DTC stored\) 2. Devices plugged into the 12V outlet 3. GPS tracking device \(engine no start/battery discharge\) 4. Dash cam \(DTC stored\) 5. Non\-certified USB cable \(Apple Carplay™/ Android Auto™ will not connect\) 6. Over\-sized wheels/tires \(incorrect GPS location\) 7. DTC C0023:14 8. Decorative trim and/or cover on the START/STOP ENGINE button Example 1: Some electrical devices connected to the DLC\-2 connector by insurance or mobile phone companies may cause: Battery discharge. The device may disrupt the CAN system battery saver mode. • IDS/MMDS will not communicate with the vehicle due to poor DLC\-2 connection. The aftermarket device may cause DLC\-2 female terminals to spread open.
- [SA\-029\-26](/bulletins/11032103.md), 2026-05-05, Service bulletin: UNKNOWN OR OTHER; ENGINE; POWER TRAIN; SERVICE BRAKES. This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA\-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle\-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle \-specific manufacturer scheduled maintenance. Workshop Manual \- Refer to section 00\-00 SCHEDULED MAINTENANCE. Owner's Manual \- Refer to section 8 Maintenance and Care. b. Note: Please refer to the information below outlining the services not included in Mazda's Factory Scheduled Maintenance: IMPORTANT: Recommending fluid flushes when not necessary can lead to customer confusion and dissatisfaction. Fluid flushing for preventive maintenance purposes is strongly discouraged, unless otherwise specified in a published procedure \(Owner’s Manual, Workshop Manual, Technical Service Bulletin, etc.\).
- [SA\-026\-26](/bulletins/11032101.md), 2026-05-05, Service bulletin: ENGINE. This Service Alert supersedes the previously issued M\-Tip\(s\) listed below. The changes are noted in Red text. MT\-002/19 09/30/19 and 12/19/19 DESCRIPTION If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the intake manifold is not cleaned properly, the replacement engine may fail prematurely. Metallic debris from the old engine \(with catastrophic internal mechanical failure\) may rest inside the intake manifold. When the new engine assembly is installed, debris in the intake manifold will be ingested into the new engine and cause internal damage. Clean the intake manifold internally to remove any debris from old engine before installing the new replacement engine assembly. If the intake manifold cannot be properly cleaned internally, replace it.
- [01\-008\-26](/bulletins/11032003.md), 2026-05-03, Service bulletin: POWER TRAIN. This bulletin supersedes the previously issued bulletin\(s\) listed below. The changes are noted in Red. 01\-008/23 06/05/23 Some vehicles may exhibit rattling noises from the engine compartment and oil leakage from the drive belt auto tensioner. This may be caused by insufficient sealing at the drive belt auto tensioner damper when the auto tensioner fully operates under both high ambient temperature and high load conditions. To eliminate this concern, the shape of the drive belt auto tensioner damper has been changed. REPAIR PROCEDURE If the tensioner is found to be "No Good" after completing the Drive Belt Auto Tensioner Inspection, replace it with a modified part according to the instructions on MGSS online:
- [SA\-052\-25](/bulletins/11026351.md), 2025-12-05, Service bulletin: ENGINE; POWER TRAIN. Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service. Examples of residue or seepage that may not be considered a leak and that may not require repair based on splash shield inspection.
- [SA\-051\-25](/bulletins/11026350.md), 2025-12-05, Service bulletin: STEERING; SUSPENSION; POWER TRAIN; WHEELS. Noise, Vibration, and Harshness \(NVH\) Diagnostic Guidelines Diagnostic Guidelines When diagnosing NVH concerns, it is essential to first classify the issue into one of three primary categories: Noise, Vibration, or Harshness. Many customer complaints may involve overlapping symptoms, such as both noise and vibration, so identifying the dominant characteristic is critical. Once the primary symptom is determined, follow the appropriate diagnostic path. For example, if a concern includes both noise and vibration but is related to vehicle speed, the vibration diagnostic path should be followed. When considering component replacement during the diagnostic process, it is best practice to start with the lowest cost or most accessible part unless diagnostic evidence clearly identifies a more expensive or complex component as the root cause. This approach helps minimize repair costs and avoids unnecessary part replacements. For example, a growling or bearing whine noise may be mistakenly attributed to internal components in the differential, transfer unit, or transmission, when the actual source is a wheel bearing. Misdiagnosis like this can lead to unnecessary repairs, added time and cost. To help prevent this, always follow the guidelines in the repair procedure.
- [SA\-079\-24](/bulletins/11009654.md), 2024-11-04, Service bulletin: POWER TRAIN. The SKYACTIV\-DRIVE FW6A\-EL AT uses “Automatic Transmission Fluid \(ATF\) Type: FZ”. Only use “ATF\-FZ” to fill or top off the fluid level. ATF\-FZ is specially designed for use in the SKYACTIV\-DRIVE series AT. It is a low viscosity formula with less friction for better fuel economy. NOTE: ATF\-FZ is colored blue for easy identification.
- [SA\-057\-24](/bulletins/11007019.md), 2024-09-04, Service bulletin: ENGINE; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. If you encounter any type of electrical concern \(e.g, dead battery, engine no start, DTC\(s\) stored...\), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices.
- [SA\-052\-24](/bulletins/11007010.md), 2024-09-04, Service bulletin: POWER TRAIN; ENGINE. Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service.
- [PF\-24\-03](/bulletins/10252507.md), 2024-04-03, Service bulletin: POWER TRAIN. Due to limitations, certain vehicles from 2016 to current models might display an inaccurate transmission part number in the Global Electronic Parts Catalog \(GEPC\). To provide support in such cases, a temporary lookup guide has been developed for assistance.

JSON: [/v1/bulletins/10145249](/v1/bulletins/10145249)

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