MajorCommonEngine

MG ZST: 1.3T Turbo Intercooler Pipe Clip Failure Causing Boost Leak

1.3T Turbo Intercooler Pipe Clip Failure Causing Boost Leak is a common engine fault on the MG ZST on the 2019 onward cars, and we rate it major. Putting it right costs $100 to $450 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 5 documented faults on the MG ZST.

Vehicle: MG ZST
Engine: 1.3L
Years: 2019 onward
Fuel: petrol
Gearbox: dct
System: Engine

This page covers the MG ZST as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All MG ZST faults5 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Turbocharger yet. We would rather show none than show a picture of a different part.

What goes wrong

The 1.3-litre turbocharged engine in ZS models uses spring-clip retained intercooler hose connections that are prone to releasing under boost pressure, causing a sudden loss of engine power and a hissing noise under acceleration. The failure is triggered by clip fatigue or incorrect seating during servicing. Affected vehicles typically show hesitation and power drop under load. Replacement with revised worm-drive clamps or dealer-supplied updated clips is the standard fix.

What you would notice

Loss of power under acceleration, particularly at higher throttle inputs
Hissing sound from the engine bay under load
Boost pressure fault code such as P0299
Engine entering a low-power protection mode

How to check it

Where to look. Intercooler pipes and hose connections, engine bay

Inspect all intercooler hose connections and clamp or clip condition. Look for signs of oil residue around hose joints indicating a boost leak. Squeeze hoses to check for hardening or cracking. A smoke test can confirm any boost system leak. Hard acceleration test should reveal any power drop.

Parts involved: Turbocharger.

What it costs to put right

$100 to $450 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has any hissing from the engine been noticed under hard acceleration?”
“Has the vehicle ever lost power suddenly and then recovered?”
“Have any intercooler or boost system components been replaced?”

Now check the MG ZST you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

MG ZST buyer questions

Is 1.3t turbo intercooler pipe clip failure causing boost leak serious on a MG ZST?

We rate it major and common on the MG ZST. The 1.3-litre turbocharged engine in ZS models uses spring-clip retained intercooler hose connections that are prone to releasing under boost pressure, causing a sudden loss of engine power and a hissing noise under acceleration. The failure is triggered by clip fatigue or incorrect seating during servicing. Affected vehicles typically show hesitation and power drop under load. Replacement with revised worm-drive clamps or dealer-supplied updated clips is the standard fix.

How much does it cost to fix on a MG ZST?

$100 to $450 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which MG ZST years are affected?

Our research records this fault on the 2019 onward MG ZST. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.