Enter your registration below. No email required to see your result - we'll show you the engine code, known faults, and whether a replacement is likely to be worth it.
Enter your registration and get your engine code, known faults, and a repair-or-replace verdict in seconds - no account, no email, no obligation.
Try it below - this demo uses a small sample of real fitment data to show you how it works.
Enter your registration
We identify your engine
See faults, cost & verdict
Demo tool - try plate prefixes LR21, LR15, or LR10 to see sample results. The production version integrates a live DVLA/vehicle-data lookup.
No account, no email required to see your result.
Your registration is matched against manufacturer build data to identify your exact model, generation and engine - such as 306DT or 204DTD.
Engine code, known faults, real cost data, and a repair-or-replace verdict - with a route to a quote if you want one. From there, confirm the exact spec on our engine number location guide, or run the numbers through our repair vs replace calculator.
This is one of eight free tools on the site - see also our VIN decoder and engine value checker for related lookups.
The engine code is your vehicle's confirmed primary engine - for badges known to span two different engines across their production run (like certain D300 and D200 vehicles, covered in full on our AJ20D6 fitment guide), we'll flag this and point you to our engine number location guide to confirm. The verdict uses the same 60% repair-to-value framework published openly on our Decision Framework page - it's a starting guide based on typical values for your model, not a substitute for your own vehicle's specific valuation.
Fault and cost data behind this tool is drawn from the same 2025 UK enquiry dataset behind every other page on this site - full detail on our Data Methodology page. Build and fitment data is cross-referenced against manufacturer records and independent parts suppliers.
Yes, completely free with no email required to see your result.
Very high for the primary engine fitted to your model and generation. For badges known to span two engines across their production run, such as certain D300 and D200 badged vehicles, we show both possibilities and recommend confirming against your engine number.
You can use our full Fitment Matrix to identify your engine manually by model, generation and build year, or check the engine number stamp directly using our Engine Number Location guide.
No Email GateYour result is free and immediate, always.
Honest UncertaintyWhere we're not certain, we say so and point you to the fitment matrix.
12 Vetted JLR SpecialistsEvery result routes to a specialist who can confirm and quote.
100% IndependentNo sponsors, no manufacturer influence.
Whatever your engine turns out to be, compare quotes from our vetted specialist network.
COMPARE QUOTES NOW → REPAIR VS REPLACE CALCULATOR