Jaguar XJ X358 Engine ReplacementCompare Prices & Get Quotes

Short summary: Jaguar XJ X358 engine replacement costs range from £1,600 for a rebuilt 2.7 TDV6 diesel to £5,500 for a supercharged 4.2 V8. Supply-only rebuilt engines average £2,000-£5,500 depending on engine code, with supply-and-fit adding £800-£1,500 labour.

• Rebuilt AJD 2.7 TDV6 units start around £1,600 supply-only
• Rebuilt AJ34 4.2 V8 replacements average £2,400-£4,200
• Rebuilt AJ33SC supercharged V8 commands £3,200-£5,500
• Supply-and-fit labour typically adds £800-£1,500

Short summary: The most common warning sign is a metallic rattle on cold start, lasting 1-3 seconds. As the tensioners worsen, the rattle may persist longer or occur on hot starts. Ignoring this warning risks the chain jumping teeth, causing valve-to-piston contact and catastrophic engine failure.

• Cold-start rattle is the primary warning sign
• Plastic tensioners wear prematurely, allowing chain slack
• Updated metal tensioners provide a permanent fix
• Do not continue driving if rattle is present

Short summary: The 2.7 TDV6 offers strong fuel economy and relaxed cruising but has a known vulnerability: crankshaft bearing failure that can snap the crankshaft. Regular oil changes (every 10,000 miles or annually) and prompt investigation of any bottom-end knock are essential to avoid catastrophic failure.

• Crankshaft bearing failure is the dominant failure pattern
• Regular oil changes are critical to bearing longevity
• Any knocking noise from the bottom end requires immediate investigation
• A rebuilt unit with upgraded bearings offers improved reliability

Short summary: Replacing an X358 engine is often worthwhile if the chassis, interior and electronics remain sound. With X358 values typically £3,000-£9,000, a rebuilt engine at £2,000-£5,500 can extend the car's life significantly. For cars valued under £4,000, a used engine may offer better value; above £6,000, a rebuilt unit with 12-month warranty is the smarter investment.

• X358 values range from £3,000-£9,000 depending on condition
• Rebuilt engine with warranty protects your investment
• X358 is considered a future classic, supporting long-term value
• Supply-and-fit packages simplify the process

Short summary: Identify your X358 engine code by checking the VIN plate on the firewall, the service book, or using EnginesMarket's free registration lookup tool. X358 codes include AJ34 (4.2 V8 petrol), AJ33SC (4.2 supercharged V8), AJD/276DT (2.7 TDV6 diesel), RG (3.5 V8) and AJ-V6 (3.0 V6 petrol). Matching the exact code ensures compatibility.

• VIN plate on driver-side firewall displays engine code
• Service book and MOT certificates often record the code
• Registration lookup confirms engine code and compatible replacements

Short summary: The X358 is the 2007 facelift of the X350, widely considered the last of the traditionally styled XJs. The X358 features a revised front grille and bumper assembly, side vents, rear tail lights and rear bumper. The engine range - 3.0 V6 petrol, 2.7 TDV6 diesel, 3.5 V8, 4.2 V8 and 4.2 supercharged V8 - remained unchanged between the two generations.

• X358 is a cosmetic facelift of the X350, not a new platform
• Revised front grille, bumper, side vents and rear lights distinguish it
• Same engine range as the X350
• Production ran 2007-2009