Aston Martin AJ133 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility

A reconditioned Aston Martin AJ133 engine typically costs between £5,500 and £9,000 for supply only, or £6,410 to £10,170 fully fitted by an accredited specialist. Prices vary based on whether the timing chain tensioners, supercharger coupler, and coolant crossover pipes are included in the reconditioning process. Labour typically adds 14-18 hours of specialist workshop time due to complex ancillary removal.

• Prices vary based on whether the timing chain tensioners, supercharger coupler, and coolant crossover pipes are included in the reconditioning process.
• Labour typically adds 14-18 hours of specialist workshop time due to complex ancillary removal.

The most documented failures are timing chain tensioner wear (particularly in pre-2013 models), coolant leaks from the plastic crossover pipes, and supercharger coupler degradation. Symptoms include a metallic rattling noise on cold starts, a sweet smell in the engine bay, or a rhythmic chattering at idle. If ignored, tensioner failure can lead to catastrophic valve-to-piston contact, while coolant loss can cause severe overheating.

• Symptoms include a metallic rattling noise on cold starts, a sweet smell in the engine bay, or a rhythmic chattering at idle.
• If ignored, tensioner failure can lead to catastrophic valve-to-piston contact, while coolant loss can cause severe overheating.

The Aston Martin AJ133 is fitted to the V8 Vantage (later models) and early DB11 V8 variants. It is fundamentally the same 5.0L supercharged V8 widely deployed across the Jaguar (XF, XJ, F-Type) and Land Rover (Range Rover, Discovery 4) lineups, albeit with Aston Martin-specific ECU calibration and ancillary packaging. Always verify your specific chassis code, as it is commonly confused with the naturally aspirated 5.0L (508PN) or the newer Mercedes-sourced M177.

• It is fundamentally the same 5.0L supercharged V8 widely deployed across the Jaguar (XF, XJ, F-Type) and Land Rover (Range Rover, Discovery 4) lineups, albeit with Aston Martin-specific ECU calibration and ancillary packaging.
• Always verify your specific chassis code, as it is commonly confused with the naturally aspirated 5.0L (508PN) or the newer Mercedes-sourced M177.

A reconditioned Aston Martin AJ133 is strongly recommended over a used unit due to the known timing chain tensioner and cooling system vulnerabilities on higher-mileage examples. A proper reconditioning process installs revised timing chain tensioners, replaces the supercharger coupler, and updates all plastic coolant crossover pipes. Used units rarely come with documented proof that these critical preventative repairs have been performed.

• A proper reconditioning process installs revised timing chain tensioners, replaces the supercharger coupler, and updates all plastic coolant crossover pipes.
• Used units rarely come with documented proof that these critical preventative repairs have been performed.

You can confirm your engine code by checking the compliance sticker and VIN plate, or by having a specialist inspect the code stamped directly onto the engine block during routine servicing. It is commonly confused with the naturally aspirated AJ-V8 5.0 NA or the newer M177 twin-turbo V8. Fitting the wrong revision will lead to complete ECU incompatibility, incorrect supercharger mapping, and severe running issues.

• It is commonly confused with the naturally aspirated AJ-V8 5.0 NA or the newer M177 twin-turbo V8.
• Fitting the wrong revision will lead to complete ECU incompatibility, incorrect supercharger mapping, and severe running issues.