Every Jaguar engine code cross‑referenced to every model, chassis and year range. Use our matrix, VIN decoder and registration lookup to identify your exact engine in seconds.
Your Jaguar's engine code is the key to ordering the right replacement, confirming compatibility and avoiding costly mistakes. The code is stamped on the engine block and encoded in your VIN — and our matrix below shows you exactly which engine belongs to which model.
Start with our registration lookup tool for the fastest answer, or use the matrix below to manually cross‑reference.
Every engine code, its family, and the Jaguar models and chassis it was fitted to.
| Engine Code | Type | Models / Chassis | Years | Notes |
|---|---|---|---|---|
| 204DTD | 2.0 Diesel (Ingenium) | XE (X760), XF (X260), F-Pace (X761), E-Pace (X540) | 2015–present | Pre‑2019 tensioner risk; revised after |
| 204PT | 2.0 Petrol (Ingenium) | XE (X760), XF (X260), F-Pace (X761), E-Pace (X540) | 2015–present | More reliable than diesel; water pump weak point |
| 306DT | 3.0 V6 Diesel | XF (X260), XJ (X351), F-Pace (X761) | 2010–2021 | Crankshaft bearing failure risk; D300 badge shared with AJ20D6 |
| 276DT | 2.7 V6 Diesel | XF (X250), XJ (X350), S‑Type (X200) | 2004–2010 | Oil pump housing failure common |
| AJ126 | 3.0 V6 Petrol SC | XF (X250, X260), XJ (X351), F‑Type (X152), F‑Pace (X761) | 2012–2021 | Cooling system failures; water pump and crossover pipes |
| AJ133 | 5.0 V8 Petrol SC | XF (X250), XJ (X351), F‑Type (X152), XK (X150) | 2009–2015 | Pre‑2013 timing chain tensioner risk; revised after |
| AJ20D6 | 3.0 Straight‑6 Diesel | XF (X260), XJ (X351), F‑Pace (X761) | 2020–present | Replaces 306DT in D300/D350; no catastrophic failure pattern yet |
| AJ‑V8 | 4.0/4.2 V8 Petrol | XK (X100), XJ (X308, X350), S‑Type (X200) | 1996–2009 | Chain guide wear on earlier units |
| AJ6 / AJ16 | 3.6/4.0 Straight‑6 Petrol | XJ (X300, XJ40), XJS | 1986–1996 | Robust six‑cylinder; parts availability declining |
| Duratorq 2.0 | 2.0 Diesel | X‑Type (X400) | 2003–2009 | Ford‑sourced; injector and DPF issues |
| 224DT | 2.2 Diesel | X‑Type (X400), S‑Type (X200) | 2004–2009 | EGR and turbo actuator failures |
| V12 | 5.3/6.0 V12 Petrol | XJS, XJ (Series 3, XJ40) | 1971–1997 | Specialist territory; high maintenance cost |
| XK6 | 2.8/3.4/3.8/4.2 Straight‑6 | XK, Mark 2, E‑Type | 1948–1992 | Classic engine; many variants |
For chassis‑specific details and exact year splits, see the Engine Code Guide or use our VIN Decoder.
Three reliable methods — from quickest to most certain.
Enter your registration or VIN into our registration lookup or VIN decoder to get your exact engine code instantly. This is the fastest and most accurate method.
The engine code is stamped on the block. Location varies by engine family — our engine number location guide shows you exactly where to look for each engine type.
Some engines have distinctive features: the AJ20D6 straight‑six has a different rocker cover and a single turbo, while the 306DT V6 has two turbos. Compare with our engine gallery.
Ordering the wrong engine because you relied on the badge (e.g., "D300") rather than the actual engine code is the most expensive mistake a Jaguar owner can make. The 306DT and AJ20D6 are both 3.0‑litre diesels, both badged D300, but they are not interchangeable — mounting points, ECU calibration, ancillaries and even the physical dimensions differ. A supplier quoting for "a D300 engine" without confirming the architecture is guessing. Our matrix and tools eliminate that guesswork.
Pro tip: Always confirm the engine code before requesting a quote. Use our registration lookup to get it in seconds, then share that code with any specialist.
The wrong assumptions that lead to wrong engines.
For a detailed breakdown of badge‑ambiguity cases, see our Engine Code Guide and the AJ20D6 fitment page.
You have three options: (1) Use our free registration lookup tool — enter your number plate and get the engine code instantly. (2) Decode your VIN — the 8th character is the engine code digit; use our VIN decoder for accurate mapping. (3) Find the engine number stamp on the block — location varies; see our engine number location guide.
No. The engine code (e.g., 204DTD, AJ126) identifies the engine type. The engine number is a unique serial number for your specific unit. The code is what you need for ordering a replacement; the serial number is for registration and provenance.
Jaguar updates engines within a model lifecycle. For example, the XF X260 started with the 306DT V6 diesel and later switched to the AJ20D6 straight‑six, both badged D300. The engine code is the only reliable identifier.
Only if the engine codes match exactly. Even then, you must confirm mounting points, ECU, ancillaries and loom compatibility. Our fitment matrix shows which codes are used in which models — but cross‑model swaps are rarely straightforward. Always consult a specialist.
We cover the most common Jaguar engines. If your code is missing, it may be a rare or older unit — please contact us and we'll add it. Alternatively, check the Engine Code Guide for additional codes.
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Use our free registration lookup to identify your engine code, then compare quotes from our vetted specialist network.
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