How to Find the Right Land Rover MHEV DC-DC Converter Part Number

Don't Order the Wrong Part: How to Find the Right MHEV DC-DC Converter Part Number

Replacing the 48V to 12V DC-DC converter on your Land Rover MHEV requires one thing above all else: the correct part number. While many converters look similar, installing the wrong one can result in incompatibility and a failed repair. Here’s how to get it right.

Method 1: The VIN is Your Golden Ticket

This is the most accurate and recommended method.

1. Locate your 17-digit Vehicle Identification Number (VIN) on your windshield or registration documents.
2. Contact a JLR parts specialist, like the team at SX-Tool, or a dealership parts counter.
3. Provide them with the VIN. They will use the official JLR Electronic Parts Catalogue (EPC) to pinpoint the exact part number engineered for your vehicle's specific model year, engine, and feature set.

This method also accounts for part ‘supersessions,' where Land Rover has updated a part and assigned it a new number. A specialist will always provide you with the latest, correct version.

Method 2: Inspect the Old Part

If the old DC-DC converter has already been removed from the vehicle, you can find the part number printed on a sticker on its housing. Look for a number in one of these formats:

• Engineering Number: e.g., T4A37286
• Land Rover Part Number: e.g., LR176473

Take a clear photo of this label. You can then use this number to search for the replacement part. Be sure to cross-reference it with a parts catalogue or specialist to check for any updated, superseded part numbers.

Why You Can't Just ‘Match the Model'

Saying “I need a converter for a 2021 Defender” isn't enough. Within the same model year, Land Rover may use different parts based on the vehicle's original market (e.g., North America vs. Europe), production date, or other optional equipment. The only way to be 100% certain is to use the VIN or the number from the original part.

We're Here to Help

Getting the right part is the first step to a successful repair. Before you order, use our search bar to look up your part number or contact our team with your VIN. We'll ensure you get the exact genuine Land Rover DC-DC converter you need for the job.