Vehicle recall R/2018/237

Mazda MX-5 and Mazda CX-3 recall: Control logic which monitors the charging control program fails to divert electrical power away

DVSA recall R/2018/237 names the Mazda MX-5 and Mazda CX-3. It was launched 17 September 2018. It covers vehicles built 11 February 2015 to 13 April 2017.

Recall data updated 22 September 2026

Recall: R/2018/237
Launched: 17 September 2018
Issued by: MAZDA
Manufacturer reference: AJ042A
Vehicles: DVSA lists 965 on each model line

What can go wrong

DVSA summary. Control logic which monitors the charging control program fails to divert electrical power away from capacitor in the event of a fault

On the subject vehicles the control logic which monitors the charging control program fails to divert the electrical power away from the capacitor when a fault is detected within the capacitor circuit. This can cause a short circuit inside the DCDC converter and could cause the engine to stall or overheating of the DCDC converter itself which could cause a fire. The fault is accompanied by the ‘i-ELOOP’ warning light being illuminated on the instrument cluster along with the ‘i-Stop’ warning light flashing The engine may in some circumstances stall and fail to restart. In extreme cases the DCDC converter could overheat and cause a fire

The fix

Reprogram the PCM with the correct control logic. If error code ‘U3000: 49-DCDC’ is stored the DCDC Converter must also be replaced.

Models and build dates

As listed in the DVSA recall file. DVSA lists the same vehicle number on each line: 965. It may be a figure per line or for the whole recall.
Model	Built	Vehicles
Mazda CX-3	11 February 2015 to 13 April 2017	965
Mazda MX-5	15 May 2015 to 13 April 2017	965

Is a specific car affected? A recall lists models and build dates, not individual vehicles, so these pages cannot tell you whether one car is included. Enter the registration on the DVSA vehicle recall checker on GOV.UK, or give the vehicle identification number (VIN) to the manufacturer or one of its dealers. Buying used? Ask the seller for proof that any recall work was done.

Other recalls for these models

R/2019/036 Models fitted with automatic transmission may unexpectedly downshift 25 February 2019, Mazda MX-5
R/2018/087 Software error can cause engine to fail 2 April 2018, Mazda 3, Mazda 2, Mazda CX-3
R/2019/265 Undershield metal bracket may separate from vehicle 2 September 2019, Mazda MX-5
R/2017/203 Brake hose retaining clip may fail. 14 July 2017, Mazda CX-3, Mazda 2
R/2017/163 Tailgate may drop down without warning 31 May 2017, Mazda 6, Mazda CX-3, Mazda CX-5 and others
R/2021/435 Low pressure fuel pump impeller might become deformed 4 January 2022, Mazda 2, Mazda CX-3, Mazda 6 and others

Found one you might buy?

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Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA vehicle recall records (RecallsFile.csv), recalls launched 1992 to 2026. Recall data updated 22 September 2026.

Recall wording is DVSA's, with capitals and punctuation tidied and American spellings such as tire, center and windshield given in British English. We list a recall when its make and model match a car or van family with at least 1,000 DVSA MOT tests from 2022 to 2025, and when the maker of the vehicle issued it.

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