The XJ6 was a core part of the Jaguar XJ range from 1994 to 2003, spanning the X300 and X308 generations. Across both, it used the AJ16 — a 3.2‑ to 4.0‑litre inline‑6 petrol engine. This was Jaguar’s final straight‑six before the switch to V8s, and it remains a respected unit for its smoothness and character. The XJ6 is no longer in production, but we continue to rebuild and replace engines for every one still on the road. Jaguar XJ6 Engine Compatibility Because the XJ6 uses the same AJ16 engine family across both generations, compatibility is straightforward once we confirm the exact variant and year. However, there were running changes during production, so we always verify your specific engine by registration or VIN before quoting or sourcing any parts. This ensures we fit the correct timing components, gaskets and ancillaries for your exact build. Jaguar XJ6 Applications by Generation Generation Chassis Years Engine Code Fuel X300 X300 1994‑1997 AJ16 Petrol X308 X308 1997‑2003 AJ16 Petrol Jaguar XJ6 Engines by Year Year Generation Engine Code Fuel Service 1994 X300 AJ16 Petrol Rebuild / Replacement 1995 X300 AJ16 Petrol Rebuild / Replacement 1996 X300 AJ16 Petrol Rebuild / Replacement 1997 X300 / X308 AJ16 Petrol Rebuild / Replacement 1998 X308 AJ16 Petrol Rebuild / Replacement 1999 X308 AJ16 Petrol Rebuild / Replacement 2000 X308 AJ16 Petrol Rebuild / Replacement 2001 X308 AJ16 Petrol Rebuild / Replacement 2002 X308 AJ16 Petrol Rebuild / Replacement 2003 X308 AJ16 Petrol Rebuild / Replacement *1997 and 2003 were transition years — we’ll confirm your exact spec by registration.* We Cover Every Jaguar XJ6 Model Year: ✓ Jaguar XJ6 1994 Engine Rebuild ✓ Jaguar XJ6 1996 Engine Rebuild ✓ Jaguar XJ6 1998 Engine Rebuild ✓ Jaguar XJ6 2000 Engine Rebuild ✓ Jaguar XJ6 2002 Engine Rebuild If your registration year isn’t listed above, get in touch — we’ll confirm availability directly against your reg. Jaguar XJ6 Engine Sizes ✓ Jaguar XJ6 3.2L Engine (AJ16) ✓ Jaguar XJ6 4.0L Engine (AJ16) Jaguar XJ6 Fuel Types ✓ Jaguar XJ6 Petrol Engine Rebuilds Jaguar XJ6 Engine Costs A Jaguar XJ6 engine rebuild starts from £3,200 for the AJ16. A full replacement engine and fitting service is also available. Exact pricing depends on the condition of your existing engine and the parts required — submit your registration for a fixed‑price quote within 30 minutes. Related Jaguar XJ Variants Looking for a different XJ engine? We also cover: [Jaguar XJ8 Engine →] · [Jaguar XJR Engine →] · [Jaguar XJ Super V8 Engine →] · [Jaguar XJ 3.0d Engine →] · [Jaguar XJ 3.0 V6 Engine →] · [Jaguar XJ 5.0 V8 Engine →] [← View All Jaguar XJ Engines] Frequently Asked Questions What engine does the Jaguar XJ6 use? The XJ6 uses the AJ16 — a 3.2‑ to 4.0‑litre inline‑6 petrol engine. It was fitted from 1994 to 2003 across the X300 and X308 generations. How much does a Jaguar XJ6 engine rebuild cost? Rebuilds start from £3,200 for the AJ16. Exact price depends on condition and parts required — submit your reg for a fixed‑price quote. Which engine code is fitted to my XJ6? All XJ6 models use the AJ16. We’ll confirm your exact spec by registration to ensure we quote the right parts. Do you rebuild AJ16 XJ6 engines? Yes. We rebuild the AJ16 to a near‑new standard, replacing worn components with updated OEM parts, and back it with a 12‑month unlimited‑mileage warranty. Do you supply used XJ6 engines? Yes, in some cases a matched low‑mileage used engine is the right option. Our team will advise honestly once we’ve matched your registration and understood your situation. Can you recover my XJ6 if the engine has failed? Yes — nationwide recovery is available from £70, and most vehicles are collected within a few hours of booking. How long does an XJ6 engine rebuild take? Most rebuilds are completed within 3‑5 working days from the time your car arrives at our workshop. Is rebuilding better than fitting a used engine? For most XJ6 owners, yes. A rebuild removes the compatibility risk that comes with an unknown used unit’s history, and comes with a 12‑month unlimited‑mileage warranty — often longer and more comprehensive than what a used engine supplier offers. <a name="quote-form"></a> Get Your Free Jaguar XJ6 Fixed‑Price Quote [Quote Form: Registration Number | Postcode | Name | Phone | Email | Issue/Enquiry Type (dropdown: Engine Failure / Replacement Needed / General Enquiry) | Submit] Most quotes returned within 30 minutes during working hours. ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://jaguargarage.uk#organization", "name": "Jaguar Garage", "url": "https://jaguargarage.uk", "email": "info@jaguargarage.uk", "telephone": "+44 01268 944 234", "sameAs": [ "https://facebook.com/jaguarrebuildgarageuk", "https://twitter.com/jaguarrebuildgarageuk", "https://instagram.com/jaguarrebuildgarageuk", "https://tiktok.com/@jaguarrebuildgarageuk" ] }, { "@type": "AutoRepair", "@id": "https://jaguargarage.uk#autorepair", "name": "Jaguar Garage – XJ6 Engine Rebuild Specialists", "url": "https://jaguargarage.uk/jaguar-xj6-engines", "telephone": "+44 01268 944 234", "email": "info@jaguargarage.uk", "priceRange": "£££", "address": { "@type": "PostalAddress", "streetAddress": "Unit A5 Windsor Road, Commercial Estate, Ramsden Heath", "addressLocality": "Billericay", "postalCode": "CM11 1QE", "addressCountry": "GB" }, "openingHours": "Mo-Fr 09:00-18:00, Sa 11:00-14:00", "areaServed": "GB", "parentOrganization": { "@id": "https://jaguargarage.uk#organization" }, "brand": { "@type": "Brand", "name": "Jaguar" } }, { "@type": "Service", "serviceType": "Jaguar XJ6 Engine Rebuild & Replacement", "provider": { "@type": "AutoRepair", "name": "Jaguar Garage" }, "areaServed": "GB", "offers": { "@type": "Offer", "priceCurrency": "GBP", "price": "3200", "description": "Jaguar XJ6 engine rebuild starting price, AJ16" } }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What engine does the Jaguar XJ6 use?", "acceptedAnswer": { "@type": "Answer", "text": "The XJ6 uses the AJ16 — a 3.2‑ to 4.0‑litre inline‑6 petrol engine. 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We continue to rebuild and replace engine engines for every XJ6 on the road.