Service bulletins for the 2018 Mazda CX-5
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.
634 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Engine are shown. Show all
| SA-025-20 | 2020-02-27. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. A valve tapping or knocking noise may be heard from the top end after the engine cools down (the vehicle is parked overnight) or after it has been idling for an extended time. The tapping noise will decreases as the vehicle is being driven or if the rpm is held above 2500-3000 RPM. This may be caused by the valve Hydraulic Lifters (HLA) bleeding down as the engine cools or when the engine has been idling for an extended period of time, creating excessive valve lash clearance. |
|---|---|
| SA-009-20 | 2020-01-30. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; STRUCTURE. LACK OF POWER UNDER HEAVY LOAD WITH NO WARNING LIGHTS OR DTCS: Some customers may complain of a lack of power under heavy load without any warning lights or DTCs. This concern may be due to a loose or detached hood weatherstrip, which can cause a blockage or restriction in the air intake system. |
| SA-005-20 | 2020-01-30. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. THUMPING/RATTLING NOISE FROM ENGINE COMPARTMENT: Some customers may complain about an unusual thumping/rattling noise coming from the engine compartment. The noise is most pronounced under the following conditions: • Engine at idle • Transmission in drive • Foot on the brake pedal • A/C OFF • Audio OFF The noise may be caused by loose fitting heater hoses vibrating the heater hose bracket protector. |
| SA-053-19 | 2019-12-21. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. GUIDE LINES AND PHOTOS TO DETERMINE IF FLUID/OIL SEEPAGE OR LEAK IS SEVERE ENOUGH TO REQUIRE WARRANTY REPAIR OR TO CLEAN AND MONITOR. 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. |
| MT-002-19 | 2019-12-20. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. 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. |
| 01-022-19-3657 | 2019-12-20. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING. There is a concern that some water pumps are being replaced that are not faulty, due to signs of a very small coolant leak from the bleed hole. This Service Bulletin is to inform you about the water pump sealing mechanism and the criteria if replacement is necessary or not. |
| 01-019-19-3628 | 2019-12-05. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may exhibit oil leakage from the drive belt auto tensioner and rattling noises from the engine compartment. 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. |
| SA-012-19b | 2019-11-24. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. A valve tapping or knocking noise may be heard from the top end after the engine cools down (the vehicle is parked overnight) or after it has been idling for an extended time. The tapping noise will decreases as the vehicle is being driven or if the rpm is held above 2500-3000 RPM. This may be caused by the valve Hydraulic Lifters (HLA) bleeding down as the engine cools or when the engine has been idling for an extended period of time, creating excessive valve lash clearance. |
| MT-004-19 | 2019-11-24. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM. Some customers may complain about: • Intermittent engine no start • Instrument cluster red security indicator light ON • Engine Start/Start Button Amber indicator light flashing • Battery discharge • Electrical relay buzzing noise • DTC B13D3:94 (Communication error with remote transmitter) stored.This may be caused by: • A key in a purse near a cell phone. The cell phone radio waves may interrupt the immobilizer system. • An aftermarket cell phone charger. The charger may produce electrical noise that interrupts the immobilizer system. • An aftermarket GPS tracker. Some aftermarket devices that are wired to the vehicles’s wiring harness may create unusual electrical symptoms. |
| SA-049-19 | 2019-11-21. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Some customers may complain about a Mazda Mobile Start (MMS) system malfunction. Use the information below to troubleshoot the customers complaint: • MAZDA MOBILE START (MMS) TROUBLESHOOTING GUIDE • CANNOT COMMUNICATE WITH VEHICLE • ERROR MESSAGE INSTALLED ON ANDROID DEVICES • COMMUNICATION ERRORS • MMS CHECK MODE - Use to verify system operation (see below). |
| 01-017-19-3601 | 2019-11-21. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Some customers may complain about a vibration through the driver and passenger seats at idle in (D)rive and (R)everse when the engine rpm drops down to 550. This vibration is caused by: 1.5L The No.3 and No.4 engine mount rubber hardening during vehicle usage at high ambient temperatures which decreases the damping force. 2.0L Components of the No.3 engine mount rubber melting inside the mount at high ambient temperatures which creates deposits on the engine mount plate that restrict engine mount plate movement. Mass production change has not been determined at this time, but modified No.3 and No.4 engine mounts have been newly established as service parts. Their material and spring characteristic have been changed. |
| 07-007-19-3638 | 2019-11-21. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE. Some customers may complain about poor heater performance even after the engine reaches normal operating temperature. This may be caused by a plugged heater core. For 2014-2016 Mazda6 and 2013-2016 (US spec) / 2017 (Mexico spec) CX-5, the CHECK ENGINE light may turn on with DTC P011A:00 (ECT sensor No.1/No.2 performance problem) stored at the same time. NOTE: Refer to TSB 01-015/15 if the customer is using a block heater at temperatures below freezing. To solve this concern, two mass production changes have been implemented. a) The concentration of the coolant has been increased so that the amount of the contained anti-rust additive is higher. b) The composition of the coolant has been changed (the ratio of the anti-rust additive has increased). |
| MT-003-19 | 2019-10-30. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may complain about high engine oil consumption. Before attempting any repairs, verify the complaint by using the guideline below to determine if an engine repair is necessary: |
| MT-002-19 | 2019-10-04. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 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. |
| SA-041-19 | 2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. If a customer comes in with the following concerns, contact Hotline for assistance. OIL PRESSURE WARNING light and/or the CHECK ENGINE light ON, DTC P055F and/or P0524 stored, No drivability concern or engine mechanical noise, Outside the VIN range in TSB 01-020/18. |
| SA-040-19 | 2019-09-23. Service bulletin. STRUCTURE:BODY:HOOD; ENGINE AND ENGINE COOLING. Some customers may complain of a lack of power under heavy load without any warning lights or DTCs. This concern may be due to a loose or detached hood weatherstrip, which can cause a blockage or restriction in the air intake system. |
| SA-012-19 | 2019-08-21. Service bulletin. ENGINE AND ENGINE COOLING. On some vehicles, a tapping or knocking noise may be heard from the top end after the engine cools down (vehicle is parked overnight) or after it has been idling for an extended time. The tapping noise will decreases as the vehicle is being driven or if the RPM is held above 2500-3000 RPM. Click here for an example of the noise. Contact Hotline for instructions. |
| 01-015-19-3626 | 2019-08-15. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may experience a lack of power and the check engine light on with DTC P061B:00 stored in PCM memory under one of the following conditions (A or B). DTC P061B:00 - [PCM] Internal control module torque calculation performance problem. Due to an improper control logic of the PCM, the engine torque calculation error detection is too sensitive. To eliminate this concern, the PCM software has been modified. |
| 01-014-19-3618 | 2019-08-15. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may experience a check engine light illuminating with DTC P0012:00 stored in PCM memory. DTC P0012:00 - Electric variable valve timing control system: Over-retarded. NOTE: This concern occurs only on vehicles with PCMs manufactured by MITSUBISHI. Due to improper control logic of the PCM, a false error may be detected. To eliminate this concern, the PCM software has been modified. |
| 01-013-19-3605 | 2019-08-01. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may experience both the check engine light and Selective Catalytic Reduction (SCR) warning light illuminating at the same time. This concern may be caused by lower and/or higher pressures that are detected, which are caused by micro air bubbles that remain inside the urea tank. The micro air bubbles are created at the production line when the liquid (urea) is poured quickly into the urea tank. To eliminate this concern, the pump filter will be modified to reduce any remaining micro air bubbles. |
| SA-026-19a | 2019-08-01. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING. Not only does the diesel engine have unique features compared with a traditional gasoline engine, but the Mazda SKYACTIV-D 2.2L has many unique features even when compared with a conventional diesel engine. For this reason, we are providing the following necessary basic information for service. Please familiarize yourself with the material so that you understand and can explain the unique features and operation of this engine. I. TECHNICAL FEATURES: Common Rail Injection System, Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) System, NSC (NOx Storage Catalyst) Control. II. CUSTOMER ADVICE: Before Driving, Starting the Engine, Turning the Engine Off, When Driving, Maintenance. III. REPAIR: Fuel Injector Installation. IV. PRE-DELIVERY INSPECTION (PDI): Diesel Particulate Filter (DPF) Regeneration. |
| SA-026-19 | 2019-07-02. Service bulletin. ENGINE AND ENGINE COOLING. Not only does the diesel engine have unique features compared with a traditional gasoline engine, but the Mazda SKYACTIV-D 2.2L has many unique features even when compared with a conventional diesel engine. For this reason, we are providing the following necessary basic information for service. Please familiarize yourself with the material so that you understand and can explain the unique features and operation of this engine. I. TECHNICAL FEATURES: Common Rail Injection System, Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) System, NSC (NOx Storage Catalyst) Control, II. CUSTOMER ADVICE: Before Driving, Starting the Engine, Turning the Engine Off, When Driving, Maintenance III. REPAIR: Fuel Injector Installation IV. PRE-DELIVERY INSPECTION (PDI): Diesel Particulate Filter (DPF) Regeneration |
| SA-022-19 | 2019-05-30. Service bulletin. ENGINE. If you receive a customer complain of lack of power, rough idle, engine noise with stored DTC's P0340:00, P0304:00, P3400:00, P349B:00, and/or P3498:00, perform the following. |
| SA-015-19a | 2019-05-30. Service bulletin. POWER TRAIN; ENGINE. If you receive a customer concern with the check engine light coming on and DTC P3400 (cylinder deactivation system malfunction) stored, perform the inspection in the Repair Procedure. |
| SA-011-19a | 2019-05-30. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Some vehicles may display some (or all) of the following symptoms: Check engine light on wit DTC P061B Surging on acceleration Transmission will not shift past 4th gear Various U codes (U0401 ABS, U0401, U0415 FSC, U0301, U0316 SBS/MRCC, U0442 TCM) may be set |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.