Rear Parking Sensors Fault

[andycalvia]

So I've been getting the message telling me to clean my parking sensors. They have been cleaned but still the fault persists.

Took the car to my local dealer who informed me the sensor needs replaced but would not be covered under warranty.

I was charged £113 for diagnosis and then quoted £293.46 for a new sensor to be fitted.

The alleged damage to the sensor is this miniscule chip on the right hand side of the rear sensor

Surely that's not enough to damage it beyond use. Also how does one get a stone chip on the rear sensor?

I've driven around 350,000 in cars with parking sensors and never heard of one becoming inoperable due to a stone chip, never mind something so tiny.

Any thoughts?

 

[CosmicBlue]

Pressure washers and those sensors can be an issue - water ingress trashes them.

 

[andycalvia]

Just an update the dealer was quoting the NSR sensor as being damaged and needing replaced. Yet the onboard computer shows it as being the OSR sensor. This shows no signs of damage.

Spoke to the dealer again who says the NSR sensor is throwing out the OSR one. Then surely if that was the case, they would all be flagging up, not just that one?

 

[Seriously?]

Just an update the dealer was quoting the NSR sensor as being damaged and needing replaced. Yet the onboard computer shows it as being the OSR sensor. This shows no signs of damage.

View attachment 40796

Spoke to the dealer again who says the NSR sensor is throwing out the OSR one. Then surely if that was the case, they would all be flagging up, not just that one?

They could be correct.
Or they could be quoting from the Dealers Big Book Of Excuses......

 

[EVangelist]

Just an update the dealer was quoting the NSR sensor as being damaged and needing replaced. Yet the onboard computer shows it as being the OSR sensor. This shows no signs of damage.

View attachment 40796

Spoke to the dealer again who says the NSR sensor is throwing out the OSR one. Then surely if that was the case, they would all be flagging up, not just that one?

I have the same problem. Dealer said they need testing one by one, as one failed sensor will cause the car to report a fault with the entire system (it will only operate when all sensors are working).

He needed to order a replacement sensor to test & identify the failed one following SEAT's workshop procedure.

I'm told you can troubleshoot by placing your fingertip lightly on a sensor and having a helper engage reverse gear; if the sensor is working you should feel a slight vibration. I haven't got to it yet, but I'd like to avoid the dealer's bill!

I had a Octavia with rear parking sensors for 4.5 years (bought it 4 years old) and sensors never gave trouble - makes me wonder why SEAT can't achieve the same quality with the same parts...

 

[Glosphil]

On my 2018 Mk3 Leon my rear parking sensors have shown an error a few times.. I think it is due to water ingress or just damp. A good squirt of WD40, leave for a few minutes & then wipe off the excess. After leaving for a few more hours the problem has always gone away for me. No expensive dealer involvement required.

Worth a try?

 

[LK29]

Just wondering if there was any updates on a solve for this issue please? Our MK4 PHEV has the same issue and would like to avoid taking it into a dealer if possible!

Cheers

 

[MJ]

If you get the warning to clean the sensors and there is a grey block shown against one of the sensors on the MIB screen then it tends to be the one at fault.

 

[andycalvia]

Just wondering if there was any updates on a solve for this issue please? Our MK4 PHEV has the same issue and would like to avoid taking it into a dealer if possible!

Cheers

I didn't manage to get it fixed. Seat were going to be charging a small fortune for it, so I've just persevered with the annoying fault. Tried all sorts of ways of cleaning it to no avail.

I have a 2006 Volvo C70 with 120,000 miles on the clock and the sensors on that work perfectly and I've got an 2014 ex police Peugeot 308 with 160,000 miles on it, which will have led a pretty hard life and the sensors on that also work without fault.

I genuinely just don't think they build cars to the same standard these days

 

[Kaxolo]

Same has been happening to me. The rear sensors have been failing one by one. I already replaced 4 of them.

They start giving random faults when raining and working when not raining until they totally stop working. Changing them on the dealer is really expensive so I found on ebay a seller that sells the sensors painted to the color of the car for about 50€. I change them my self. The rear centre ones are easy enough from the gap below the car, the other ones you need to open the wheel arch and stick you arm in to reach them.

I kept 2 of the faulty sensors, and for a try, i put them in a food container with one of these pouches that are sold in Tesco to remove the moisture inside the car. They are basically a pouch full of silica, So I basically made my own desiccator to remove the water from inside the sensor. To my surprise when another one failed I tried to put back one of the dried ones and it worked. Until it rained for a couple of days .

My next step was to take a dried one and I painted it with my wife´s clear nail polish to try and seal the sensor. So far 2 days raining and driving and the sensor still works.

 

[andycalvia]

Same has been happening to me. The rear sensors have been failing one by one. I already replaced 4 of them.

They start giving random faults when raining and working when not raining until they totally stop working. Changing them on the dealer is really expensive so I found on ebay a seller that sells the sensors painted to the color of the car for about 50€. I change them my self. The rear centre ones are easy enough from the gap below the car, the other ones you need to open the wheel arch and stick you arm in to reach them.

I kept 2 of the faulty sensors, and for a try, i put them in a food container with one of these pouches that are sold in Tesco to remove the moisture inside the car. They are basically a pouch full of silica, So I basically made my own desiccator to remove the water from inside the sensor. To my surprise when another one failed I tried to put back one of the dried ones and it worked. Until it rained for a couple of days .

My next step was to take a dried one and I painted it with my wife´s clear nail polish to try and seal the sensor. So far 2 days raining and driving and the sensor still works.

What's the ebay link?

 

[Kaxolo]

What's the ebay link?

OEM Parking sensor 5WA919275C PDC VW Golf Caddy Skoda CUPRA All Colors Available | eBay

OEM Parking sensor 5WA919275C PDC VW Golf Caddy Skoda CUPRA All Colors Available | eBay Motors, Automotive Tools & Supplies, Diagnostic Service Tools | eBay!

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