MajorCommonElectrical

Peugeot 206: Water ingress kills the COM2000 / BSI and corrodes the ECU

Water ingress kills the COM2000 / BSI and corrodes the ECU is a common electrical fault on the Peugeot 206 on the 2000–2007 cars, and we rate it major. Putting it right costs $400 to $2,200 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 7 documented faults on the Peugeot 206.

Vehicle: Peugeot 206
Years: 2000–2007
System: Electrical

This page covers the Peugeot 206 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Peugeot 206 faults7 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

Blocked scuttle/plenum drains and tired seals let water reach the electronics, most notably the COM2000 steering-column module and the body computer, and coolant can also creep up the wiring into the ECU plug. Symptoms are wild and intermittent: electric windows and central locking cutting out, indicators/wipers/horn acting on their own, and warning lights flashing. Chasing these faults is time-consuming and a water-damaged ECU is expensive.

What you would notice

Electric windows or central locking work intermittently
Indicators, wipers or horn operate by themselves
Random warning lights
Damp carpets or a musty smell in the cabin

How to check it

Where to look. COM2000 module behind the steering wheel; BSI/fuse box and ECU; scuttle drains under the windscreen

Press down on the front carpets and lift the mats feeling for damp or checking for a musty smell.
Test every window, the central locking, indicators, wipers and horn several times.
Wiggle the column stalks.
If anything is intermittent, treat it as a potential water/electronics problem, not a quick fix.

What it costs to put right

$400 to $2,200 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

“Have the footwells ever been wet?”
“Do all the windows, locks, indicators and wipers work every time?”
“Has the ECU or column module ever been replaced?”

Now check the Peugeot 206 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 the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

ECU Testing - 'Peugeot 207/206 water damaged ECU'
WhoCanFixMyCar - 'Common problems with the Peugeot 206' (COM2000 unit)

Peugeot 206 buyer questions

Is water ingress kills the com2000 / bsi and corrodes the ecu serious on a Peugeot 206?

We rate it major and common on the Peugeot 206. Blocked scuttle/plenum drains and tired seals let water reach the electronics, most notably the COM2000 steering-column module and the body computer, and coolant can also creep up the wiring into the ECU plug. Symptoms are wild and intermittent: electric windows and central locking cutting out, indicators/wipers/horn acting on their own, and warning lights flashing. Chasing these faults is time-consuming and a water-damaged ECU is expensive.

How much does it cost to fix on a Peugeot 206?

$400 to $2,200 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 Peugeot 206 years are affected?

Our research records this fault on the 2000–2007 Peugeot 206. 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.

How do I check for it before I buy?

Press down on the front carpets and lift the mats feeling for damp or checking for a musty smell. Test every window, the central locking, indicators, wipers and horn several times. Wiggle the column stalks. If anything is intermittent, treat it as a potential water/electronics problem, not a quick fix. Look here: COM2000 module behind the steering wheel; BSI/fuse box and ECU; scuttle drains under the windscreen