How do you replace brake accumulator for a 1989 Jaguar XJS?

To replace the brake accumulator on a 1989 Jaguar XJS, first ensure the vehicle is safely elevated and secure. Disconnect the negative battery terminal, then locate the brake accumulator, usually found near the master cylinder. Use a wrench to carefully remove the accumulator by unscrewing it from its mounting point, and replace it with the new unit, tightening it securely. After installation, reconnect the battery and bleed the brake system to remove any air.