DC/DC converter N8B2-14B227-AC 433123456 – Jaguar Land Rover MHEV
Original DC/DC converter used in selected Land Rover and Range Rover vehicles equipped with a Mild Hybrid Electric Vehicle system. The N8B2-14B227-AC reference also appears in service documentation as N8B214B227AC and under service number 433123456. Before dispatch, the module is checked for basic operation and the condition of its connectors.
Applications of the N8B214B227AC converter
Official Jaguar Land Rover documentation confirms the use of this converter variant in the following models equipped with an MHEV system:
- Range Rover L460 – SUV, from model year 2022, selected MHEV versions,
- Range Rover Sport L461 – SUV, from model year 2023, selected MHEV versions,
- Range Rover Velar L560 – SUV, from model year 2020, selected MHEV versions,
- Land Rover Discovery L462 – SUV, from model year 2020, selected MHEV versions,
- Range Rover Evoque L551 – SUV, from model year 2019, selected MHEV versions,
- Land Rover Discovery Sport L550 – SUV, from model year 2019, selected MHEV versions,
- Land Rover Defender L663 – SUV, from model year 2020, selected MHEV versions.
Not every engine version of the models listed above uses the same converter. Before purchasing, the complete reference should be compared with the original module fitted to the vehicle. Particular attention should be paid to the N8B2-14B227-AC designation, as a different suffix may indicate a different part variant.
Common symptoms of a faulty DC/DC converter
Jaguar Land Rover identifies an internal 48 V converter fault as one possible cause of electrical power supply problems in the vehicle. Possible symptoms include:
- “Stop Safely Electrical Fault Detected” message on the instrument cluster,
- loss of or no charging of the 12 V electrical system,
- faults related to operation of the MHEV system,
- visible overheating or damage to the converter connectors,
- damage to the wiring harness or connector near the DC/DC module,
- charging system fault codes stored during vehicle diagnostics.
If a fault is suspected, not only the converter itself but also its connectors and wiring harness should be inspected. The official JLR procedure includes checking these components before replacing the module.
Programming, cloning and module preparation
The N8B2-14B227-AC is a DC/DC converter, so it should not be treated like an engine ECU or automatically assumed to require immobiliser data cloning.
- before dispatch, we compare the part number with the customer’s original module,
- the module is checked for basic functionality before sale,
- cloning is not a standard procedure confirmed by JLR for this converter,
- the need for coding or configuration should be determined for the specific vehicle using the VIN and diagnostic results,
- after installation, the charging system should be diagnosed and stored fault codes cleared,
- if the connector is damaged, the wiring harness connected to the converter should also be inspected.
The official manufacturer procedure for N8B214B227AC is based on diagnosis of the MHEV system and, where a converter fault is confirmed, replacement of the module. For this reason, we do not state that programming or cloning is mandatory without first verifying the specific vehicle.
Frequently asked questions – N8B2-14B227-AC
Does the N8B2-14B227-AC fit the Land Rover Defender L663 MHEV?
Yes, JLR documentation confirms the use of the N8B2-14B227-AC converter in selected Defender L663 MHEV versions from model year 2020. However, the complete reference on the original module should still be compared before purchase.
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Does the 433123456 converter fit the Range Rover Velar L560?
Yes, service number 433123456 corresponds to the N8B214B227AC converter and is specified for selected Range Rover Velar L560 MHEV versions from model year 2020.
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Is the N8B214B227AC used in the Range Rover Evoque L551?
Yes, this DC/DC converter variant is confirmed for selected Range Rover Evoque L551 vehicles with an MHEV system from model year 2019. Engine capacity should not be used as the sole basis for selecting the part without checking the reference number.
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Does the N8B2 14B227 AC DC/DC converter require programming after installation?
There is no basis for stating that programming is mandatory for every vehicle. The official JLR procedure provides for diagnosis and replacement of a faulty converter. Any additional configuration should be confirmed for the specific vehicle.
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Does the N8B2-14B227-AC fit the Discovery, Discovery Sport and Range Rover Sport?
Yes, JLR lists the Discovery L462 from MY2020, Discovery Sport L550 from MY2019 and Range Rover Sport L461 from MY2023, but only in the appropriate MHEV versions equipped with this converter reference.
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