IsItAGoodCar
Reliability Guide

Common Problems with the
2001 MG ZS (Classic)

Launched in summer 2001, the ZS mated the Rover 45 shell to retuned suspension and steering, with 1.6 and 1.8 K-Series engines, the 2.5 KV6 ZS 180 and two L-Series diesels.

What changed for 2001

  • •2.5-litre KV6 ZS 180 with 175PS, uprated brakes and 17-inch alloys
  • •1.6 ZS 110 and 1.8 ZS 120 petrol plus TD and TD 115 diesels
  • •Saloon and five-door hatchback bodies with stiffer springs and dampers

Common MOT watch-outs

  • !Worn front suspension bushes and ball joints
  • !Deteriorated rear trailing arm bushes
  • !Corrosion on sills and rear wheel arches
4
Known Issues
1
Serious
2
Moderate
1
Minor

All Known Issues

K-Series Head Gasket Failure (1.6/1.8 Petrol)

SeriousEngine

The 1.6 and 1.8 K-Series petrol engines are prone to head gasket failure, especially if the cooling system has been neglected. Blown head gaskets are a well-known fault on this platform.

Est. Repair Cost: £500–£800
Warning Signs:

Overheating, Oil/coolant mixing ("mayonnaise" under oil cap), Loss of heater performance

What to Inspect:
  • Check the oil filler cap and expansion tank for contamination
  • Verify the radiator and hoses are in good condition
Verified by IsItAGoodCar Research Team

V6 VIS Motor Failure

ModerateEngine

The Variable Intake System (VIS) motors on the 2.5 V6 fail, leaving the butterfly valves stuck in one position.

Est. Repair Cost: £150–£300
Warning Signs:

Loss of power above 3,000rpm, Rattling from the plastic intake plenum, Flat spots in acceleration

What to Inspect:
  • Listen for a "bag of marbles" sound from the manifold
  • A simple "VIS tester" can be used to check motor function
Verified by IsItAGoodCar Research Team

Front Suspension Bush Wear

ModerateSuspension & Chassis

The front suspension bushes wear prematurely, leading to vague steering, knocking noises over bumps, and uneven tyre wear. This is a common MOT failure point.

Est. Repair Cost: £100–£250
Warning Signs:

Knocking from the front end, Vague or imprecise steering, Uneven front tyre wear

What to Inspect:
  • Inspect the front lower arm bushes for splits or movement
  • Check for MOT advisories on suspension components
Verified by IsItAGoodCar Research Team

Boot Strut Failure

MinorBodywork & Rust

The gas struts supporting the boot lid weaken over time, especially on hatchbacks with large rear spoilers. The boot may not stay open on its own.

Est. Repair Cost: £30–£80
Warning Signs:

Boot lid falls shut, Difficulty holding the boot open, Struts visibly leaking oil

What to Inspect:
  • Open the boot and check if it stays up unaided
Verified by IsItAGoodCar Research Team

Buying Tips for 2001 MG ZS (Classic)

  • Check the VIS motors on the KV6 inlet manifold operate through the rev range
  • Confirm the KV6 timing belt has been changed on schedule
  • Check the boot floor and rear light seals for water
2002–2003
Check a 2001 MG ZS (Classic) by Registration