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MG ZR problems (2001–2005)

The only engine of the MG ZR that we have documented, the Rover K-Series, has high or critical severity faults in the versions it is fitted to. Our verdict for the versions it is fitted to: «With caution».[1][2][3][4]

Outside the engine: The sources consulted document few faults on the MG ZR outside the engine, mostly minor issues with fitting, the clutch and the locking.[5]

MG ZR (2001–2005)
Photo: Sjoerd95 · CC BY-SA 3.0 · Wikimedia Commons. Reference image for this generation.
02468105.4out of 10

MG ZR rating: acceptable reliability

Calculated using only 3 documented faults and their sources: the most serious and frequent faults weigh more. Provisional: we have found few sources for the rest of the car (suspension, brakes, electronics…). Its faults appear on the page, but they do not count towards the score or the rankings until the analysis is complete. How it is calculated

  • Engine5.43 faults
  • GearboxLittle data
  • SuspensionLittle data
  • BrakesLittle data
  • Tyres and wheelsLittle data
  • SteeringLittle data
  • Electrical systemLittle data
  • Headlights and lightsLittle data
  • Electronics and infotainmentLittle data
  • Climate controlLittle data
  • Bodywork and interiorLittle data
  • Airbags and safetyLittle data

The weak points of the MG ZR

  1. 1High severity: Head gasket failureRover K-Series engine
  2. 2High severity: Sunken cylinder liners and warped head after overheatingRover K-Series engine
  3. 3Medium severity: Coolant leaks: expansion tank cap, rear block rail and hosesRover K-Series engine
  4. 4Medium severity: Clutch cables that snap and loose linkageGearbox and clutch
  5. 5Low severity: Loose parts inside and outside the bodyBodywork and interior

Documented engine

The first label is the most serious fault affecting that engine in this car; the second, our verdict for the versions it is fitted to. Each engine's risk index is calculated only from the faults that affect this car (how we calculate it). We only show engines we have documented with sources: if yours does not appear, we have not analysed it yet. View all engines

See what to check before buying

Outside the engine

8 sourcesHow we work

Rover K-Series

Rover / MG K-Series (1.1, 1.4, 1.6 and 1.8 16V, incluido el 1.8 VVC) · Petrol

In the ZR
2001–2005[6][7]
Names
ZR 105 · ZR 120 · ZR 160
Faults that affect it
3 · 2 of high or critical severity
Risk index on this car
46
Moderate risk

Verdict for the versions it uses

  • 1.4 8V/16V 74-103 hp (14K2F / 14K4F, 1995-2005)1995–2005 · 74–103 hp · 14K2F, 14K4F

    With caution

    Technical sources describe the head failure mainly on the 1.8, but Diariomotor speaks of "all K-Series"; it is worth buying if the coolant has been looked after and there are no signs of overheating.[1][2]

  • 1.8 16V 117-136 hp (18K4F, 1995-2005)1995–2005 · 117–136 hp · 18K4F

    With caution

    This is the version most cited in head gasket failures; it is worth buying if it already has the multi-layer (MLS) gasket with the liners measured, and Diariomotor considers its absence a good argument for negotiating the price.[1][2][3]

  • 1.8 VVC 145-160 hp (18K4K, 1995-2005)1995–2005 · 145–160 hp · 18K4K

    With caution

    It shares the 1.8's head gasket problem (suppliers sell specific multi-layer kits for the VVC); we have not found faults specific to the VVC mechanism in open sources.[3][4]

Faults that affect the ZR

  1. High severityFrequency: CommonCylinder head and blockHead gasket failureThe K-Series' big problem is the head gasket, which can fail even below 100,000 km because of a mix of gasket design, cooling and overheating. The usual repair uses the multi-layer steel (MLS) gasket that was developed for the Freelander.
  2. High severityFrequency: OccasionalCylinder head and blockSunken cylinder liners and warped head after overheatingAfter overheating, the K-Series liners can end up below the surface of the block and the aluminium head can be marked or warped; then no gasket seals properly and the liner height has to be measured and restored.
  3. Medium severityFrequency: OccasionalCoolingCoolant leaks: expansion tank cap, rear block rail and hosesThe K-Series circuit holds about 5.5 litres, so a slow leak empties the expansion tank and causes localised overheating. The points cited are the tank cap, the metal rail at the rear of the block (corrosion), the hoses and the coolant passages of the inlet manifold gasket.

ZR Rover K-Series pageAll versions and faults of the Rover K-Series

Faults of the MG ZR outside the engine

Suspension, brakes, tyres, electronics and the rest of the car. They occur with any engine.

Checklist for buying a used MG ZR

Check the advert or the paperwork to see which engine the car has and go through its section. Each point comes from a documented fault; you can tick them off as you inspect.

If it has the Rover K-Series (2001–2005)

Head gasket failure

High severity

Sunken cylinder liners and warped head after overheating

High severity

Coolant leaks: expansion tank cap, rear block rail and hoses

Medium severity

Wear parts for the MG ZR

Brakes, wiper blades, pollen filter and battery, searched for this model. The exact part number depends on the engine and year: confirm it with the registration plate or VIN.

Affiliate links: if you buy from these shops, MotorFiable may receive a commission at no cost to you. Check compatibility against the registration plate or VIN before ordering. Affiliate links

Buying a MG ZR?

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Own a MG ZR? Tell us what faults you have had, at what mileage and how much you paid. Report your fault.

Frequently asked questions

Is the MG ZR reliable?

The only engine of the MG ZR that we have documented, the Rover K-Series, has high or critical severity faults in the versions it is fitted to. Our verdict for the versions it is fitted to: «With caution». The sources consulted document few faults on the MG ZR outside the engine, mostly minor issues with fitting, the clutch and the locking.

What problems does the MG ZR have apart from the engine?

The sources consulted document few faults on the MG ZR outside the engine, mostly minor issues with fitting, the clutch and the locking. The most important documented faults are: clutch cables that snap and loose linkage (gearbox and clutch, medium severity), loose parts inside and outside the body (bodywork and interior, low severity) and problematic central locking (electrical system, low severity).[5]

What faults does the MG ZR have?

The most important by severity and frequency, on the engines we have documented, are: head gasket failure (Rover K-Series, high severity), sunken cylinder liners and warped head after overheating (Rover K-Series, high severity) and coolant leaks: expansion tank cap, rear block rail and hoses (Rover K-Series, medium severity).

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Guía de compra del MG TF de segunda manoDiariomotor · Motoring press · published 7 November 2023 · consulted 8 October 2026 · in Spanish
  2. Choosing the correct K Series Head Gasket KitDMGRS · Technical documentation · consulted 8 October 2026
  3. MG ZR ZS ZT & Modern Engine & FuelMGOC Spares · Technical documentation · consulted 8 October 2026
  4. MGF & TF Headgasket Repair KitsMGOC Spares · Technical documentation · consulted 8 October 2026
  5. MG ZRAuto Express · Motoring press · published 28 September 2004 · consulted 29 October 2026
  6. MG ZR (2001 - 2005) used car reviewRAC · Motoring press · consulted 8 October 2026
  7. MG ZR (used car review)Auto Express · Motoring press · published 28 September 2004 · consulted 8 October 2026
  8. Cooling and heating (K-Series: ZR, ZS, ZT, MGF, TF)MGOC Spares · Technical documentation · consulted 8 October 2026