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FAQ - Mag Ride Test, Repair, Calibration & Delete Options

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17K views 1 reply 1 participant last post by  SwissJetPilot  
#1 ·
Audi Magnetic Ride - aka "MagRide"

Audi magnetic ride is a suspension technology employed in the A3, TT and R8 families. This system continually adapts the function of the shock absorbers to the road profile and the driver’s style.

A synthetic hydrocarbon oil containing tiny magnetic particles between 3 and 10 thousandths of a millimeter in diameter – one tenth the thickness of a human hair – circulates in the shock absorber pistons. When voltage is applied to a coil integrated in the damper, a magnetic field is produced and the particles realign. They orient themselves crosswise with respect to the direction of oil flow in the piston channels, obstructing its flow. The process is completed in a few milliseconds.

The controller, which receives signals from a sophisticated system of sensors, continuously computes the optimal values for each individual wheel. It analyzes the driver’s style and the condition of the road and adaptively adjusts the function of the dampers. The Sport button allows the driver to switch between normal mode and sport mode. In normal mode – when fluid viscosity is low – the car offers up a balanced ride. In sport mode – when flow is obstructed – it is uncompromisingly firm on the road.

Solutions and Options for Failed Shocks (Dampers)

For those looking for solutions or options for their failing or broken Mag Ride shocks, I've added this post with some common links that discuss testing, OEM replacement costs and after-market delete kits.

If the MagRide fault warning icon stays on, then one or more of the Mag Ride shocks has a fault. You'll find them reported under Address 14: Susp. Elect.

• 00142 - Left Front Dampening Adjustment Valve (N336)​
• 00143 - Front Right Dampening Adjustment Valve (N337)​
• 00144 - Rear Left Dampening Adjustment Valve (N338)​
• 00145 - Rear Right Dampening Adjustment Valve (N339)​
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The Mag Ride system is directly connected with the headlight range and level sensors which if broken or damaged, can result in the following faults being reported -

• 01539 - Headlights Not Adjusted​
• 00497 - Sensor for Vehicle Leveling; Rear​
• 00496 - Sensor for Vehicle Leveling; Front​
• 01316 - ABS Control Module​
• 00778 - Steering Angle Sensor (G85)​
• 00774 - Level Control System Sensor - Left Rear (G76)​
• 00775 - Level Control System Sensor - Right Rear (G77)​
• 00776 - Level Control System Sensor - Front Left (G78)​
• 01769 - Level Control System Sensor - Front Right (G289)​

The only way to replace the OEM shocks with aftermarket non-mag ride shocks is to use a "cancellation" or "delete" kit which comprises a set of resistors that plugs into the existing connectors to fool the CAN BUS into thinking the shocks are still connected to the system. There are a few companies and individuals that make them listed below.

A warning light on the dash may not necessarily be the MagRide shocks. In several cases reported in the Forum a broken, damaged or seized level sensor has triggered a fault. Be sure to check the faults first before you conclude the shock is faulty. Level sensors should be included in your routine maintenance for a visual inspection, cleaning and lubrication of the ball/socket fittings.

Mag Ride Topics & Discussions -

Connector Replacement and Repairs


Non-MagRide Shock Options

Delete Kits Options

Non-OEM Chinese made MagRide shocks -

Technical Documents -

• Suspension, Wheels & Steering (D3E80075730)
• SSP 381 Audi TT Coupé ´07 - Suspension System

MagRide Testing with VCDS -


As of Dec 2022, this post is still a work in progress. Link here.

Rebuild Services -

As of the date of this writing, Nagengast (Poland) is the only company offering rebuild / refurbishing services for Mag Ride shocks that I am aware of. They offer an exchange service to customers in Europe and North America where they will ship the shocks directly when ordered and refund the core charge when you return yours. This saves putting your TT up on blocks and waiting several weeks for your rebuilt shocks to arrive.

However with the additional cost of shipping and customs, depending on where you live, it might be cheaper to just buy new Mag Shocks directly from Audi or try to find a used one of a wrecked low mileage Mk2.

Nagengast Shock Regeneration
"NAGENGAST" ul. Malczewskiego 103 80-107 GDAŃSK
Phone:+48 883 604 053
email: raf@nagengast.pl
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Rear Shock Cap & Connector -

According to the Workshop Manual, the cap with the electrical connector on top of the rear shock must be replaced. Once it's been removed from the defective shock, it can't be reused. There have been some discussions about a possible work-around by de-pinning the connector and carefully removing it, but we have no solid documentation on this for the Audi TT Mk2. You can read more about it here.

Additionally, here's a link for a DIY on replacing the shock and cap without breaking the connector. Well worth a read!
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#2 ·
Magride Calibration

According Workshop Manual Suspension, Wheels & Steering - D3E80075730 (link) the control position must be reprogrammed/calibrated anytime a Magride shock is replaced.

This thread will discuss ODIS, which is the equipment Audi and most VAG specialists use, and whether or not VCDS can be used.

ODIS -

Organism Font Parallel Screenshot Document



Most Forums mention ODIS (Offboard Diagnostic Information System, which is basically the VAS 5051) used for VW, Audi, Seat, and Skoda vehicles (link).

If you have done the work and replaced the shocks yourself, it would be worth either having Audi Service or a qualified independent do the reprogramming/calibration.

If you paid an independent workshop to replace the shocks, they should include the reprogramming/calibration as part of the service. If this has not been done, either the shop was unaware of this requirement or they simply couldn't be bothered.

If there's a question on whether it's required, or whether or not it was done, you might want to print out the pages from the Workshop Manual to discuss this with the shop that did the work.

Here's the link.

I had it done recently by an independent. It needs to be done using ODIS, it’s a fairly quick job, < 30m.
They scan the car and then update the ride height (you measure the new height) with new settings. The process also adjusts the headlights.

It takes a few start cycles for the shocks to adapt to new settings. It makes the ride smoother in the smaller bumps and undulations. It brings back a suppleness to ride quality. Mine also felt a little smoother in the transition in a corner (but could be my imagination.)

I didn’t notice any difference in bigger bumps, still has the crash Audi ride. But IMO well worth it.



VCDS -

TBO I'm still not completely sure if VCDS supports the Magride shock reprogramming/calibration the same say ODIS does. I contacted Ross Tech to clarify as the post I found in their Forum is specific to the 00149 DTC and replacing the J250. However I have not seen a reply to my question. Link here.

I also found an older post in another forum about reprogramming/calibration the Suspension Dampener Control Module (J250) after lowering a vehicle, Link here. It includes some information on Cold Start function for the shocks which requires going around and measuring the height of each wheel from the center of the hub to the edge of the fender.

I don't know if this is the same as what ODIS would do, as it seems that the reprogramming/calibration program simply has the system look at the existing stance of the vehicle without any actual measurements, and sets a value based on what the level sensors is telling it. So I'm really not sure... :unsure:

According to SSP381 (for the Audi TT Mk2), it only mentions calibration if the Suspension Dampener Control Module (J250) or a level sender is replaced. However it does talk about Cold Start function with a diagnostic tester.

"The system initialisation must be performed when the control unit J250 and/or one or more vehicle level senders is replaced. The characteristic curves of the vehicle level sender are stored in the control unit. During the system initialisation procedure, the control unit is informed which vehicle ride heights at the wheel positions match the actual measured values generated by the vehicle level sender. If these assignments are known to the control unit, then all measured values generated subsequently by the vehicle level sender can be converted to vehicle ride heights. The basic system initialisation procedure is identical to the procedure for initialising the as systems in the A6 and A8. The system initialisation can only be performed when the code control unit is coded."

"When control unit J250 or shock absorber dampers are replaced, the control unit must determine the electrical resistance values of the damper coils at ambient temperature. The control unit saves these values as "standard values" for purposes of temperature compensation (refer to "Special functions - temperature model"). This function is activated automatically after ignition on, provided the vehicle has been out of use for at least 3 hours (e.g. even after a cold start in the morning). During this time not in use, the temperatures of the dampers have adjusted to the ambient temperature. If the mechanic has fitted shock absorber dampers which are already at ambient temperature (e.g. parts sourced directly from the spare parts warehouse), the resistance measurement function can be started immediately by activating the "Cold start" function with the diagnostic tester."


From the Ross Tech Forum -

https://forums.ross-tech.com/index.php?threads/22041/

Do not change the coding for the [14-Susp. Elect.], it is correct at [000012] since this is a 2008 Audi TT (8J) Coupe with a 3.2l VR6. To clear the code 01794-Control Module - Incorrect Chassis (VIN) Number you will need to follow the procedure below:

As per the Ross-Tech wiki page linked above
"When found in Audi TT (8J) [14]-Suspension Electronics, and the J250-Electronic Damping Control Module was replaced, it will be necessary to code the J250 and Re-adapt default ride height positions."

Here is the procedure for the " Re-adapt default ride height positions".

Re-adapt 'Susp. Elect.' (J250) to default position - ("Heights for running gear with controlled damping J250")

Specs for Audi TT Mk2 (8J):
• Front Axle = 369mm
• Rear Axle = 355mm
• (Max deviation = +/-50mm)[/INDENT]

Prerequisites -
  • Ignition [ON], Use a Battery maintainer
  • Vehicle on level surface
  • No persons or gear in Vehicle
  • Fuel Tank 50% or more
  • Nothing under vehicle
  • Door are to remain shut during the entire procedure

Typically when the Suspension Dampener Control Module (J250) has been replaced you will need to Code the J250 controller -
  • Re-adapt default position
  • If equipped with Dynamic Headlights, run the Headlight Basic Settings
  • Adapt cold start*

1) Select - [14-Susp. Elect.] -
[Security Access-16] enter - [31564], [Do it!]​

2) Measure the ride height -
In millimeters, from the center of the wheel to the edge of fender, do this for all four wheels and record the values.​
Select [Adaptation - 10]​
Enter in each of the following Channels:​
Channel 01 (front left), [Read]​
- Enter the [New value] = recorded value for the front Left wheel.​
Then press [Test] and [Save]​
Channel 02 (front Right), [Read]​
- Enter the [New value] = recorded value for the front Right wheel.​
Then press [Test] and [Save]​
Channel 03 (rear left), [Read]​
- Enter the [New value] = recorded value for the rear Left wheel.​
Then press [Test] and [Save]​
Channel 04 (rear Right), [Read]​
- Enter the [New value] = recorded value for the rear Right wheel.​
Then press [Test] and [Save]​
Channel 05 (confirmation), [Read]​
If all measured values are correct, enter "new value" of 1.​
[Test] and [Save]​

3) Check and clear fault codes -
Cycle the ignition as necessary and recheck for fault codes.​
*Note: It maybe necessary to perform the [Security Access] of [20117] to enable the (Cold Start/Reset), Adaptation Channel [110], see VCDS for important notes.​

If required, here is the Headlight Aim Control (Xenon Plus) instructions from Ross Tech. Link here.


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