24/09/2026
π§ KIA TANDEM PUMP / BRAKE SERVO FAULT β PROPER DIAGNOSIS MATTERS! π§
Hereβs another interesting diagnostic job, this time involving a Kia with an issue relating to the tandem/vacuum pump system and brake servo operation.
Our technician works through the system, showing the components involved under the bonnet, including the vacuum pipework, pump area and the vacuum supply to the brake servo.
β οΈ WHY IS VACUUM SO IMPORTANT?
The brake servo uses vacuum assistance to reduce the amount of force the driver needs to apply to the brake pedal. If the vacuum supply is insufficient, or thereβs a problem with the pump, pipework or associated components, it can result in:
β A hard brake pedal
β Reduced brake assistance
β Increased effort required when braking
β Inconsistent servo assistance
β Associated warning lights or faults
π FIND THE CAUSE β NOT JUST THE SYMPTOM
Rather than simply replacing parts, the vacuum supply and tandem pump system need to be properly tested to establish exactly where the problem is coming from.
When we're dealing with something as safety-critical as the braking system, getting the diagnosis right is essential.
πΈ WE SHOW YOU WHAT WE FIND
At Edward Street Garage, we use photos and videos to show our customers the components we're testing, explain the fault and demonstrate why a particular repair is required.
That way, you can actually see what we've found before making a decision on the repair.
π Edward Street Garage β Crewe
π 01270 382 001
π± WhatsApp: 07599 525197
Hard brake pedal, braking issue or a fault that's proving difficult to diagnose? Get in touch with our team.