98-06 Audi TT MK1 Complete Hydraulic System Upgrade 8N7871794 8N7871793 8N7871795 8N7871796 8N7871791
  • 98-06 Audi TT MK1 Complete Hydraulic System Upgrade 8N7871794 8N7871793 8N7871795 8N7871796 8N7871791

Complete Hydraulic System Upgrade - Audi TT MK1 - 1998-2006


There are two options for placing your order:

1. (Most affordable) You send in your malfunctioning Audi TT MK1 Hydraulic System, and Top Hydraulics rebuilds it.

  • The rebuild includes electric motor replacement or rewinding if necessary, service of hydraulic valves, and upgrade of internal seals in the pump and all cylinders to eliminate current or future pressure loss or internal bypass. Three years warranty.


2. (Fastest) Expedited Core Exchange Option where Top Hydraulics ships parts from our inventory first

($1210 plus a $400 Refundable Core Charge).

  • Option 2 means that you get a rebuilt & upgraded system from Top Hydraulics' inventory first, then you ship back your original system for credit of your $400 core refund. Top Hydraulics ships the system filled and vented for plug-and-play installation. You get a system that has been rebuilt to outlast and outperform OEM replacements.
Order Method:


No sales tax for orders in the USA


We provide world class technical support


3-year standard warranty (should last decades)

Complete hydraulic system upgrade for model year '98-'02 Audi TT MK1 convertible.


Rebuilt/Upgraded Hydraulic Cylinders

Four New, Upgraded Hydraulic Lines

Rebuilt/Upgraded Hydraulic Pump Assembly

Core exchange is available with refundable core deposits for the hydraulic pump and cylinders plus Top Hydraulics' inventory management fee. There is a $100 surcharge (or deduction from deposit refund) for damaged or rusty cylinder shafts.

Top Hydraulics' new hydraulic hoses with Kevlar reinforcement far exceed OEM specifications. The rated burst pressure is 23,200 PSI, far exceeding OEM specifications for a truly superior hydraulic line.  In addition to the superior pressure rating, Top Hydraulics' hoses are more flexible than the OEM hoses, which makes them longer lasting in the folding roof application, plus easier to install!  The lines are clearly labeled and come with new o-rings.

Original Audi p/n: 

LH Driver's Side Hydraulic Lines: 8N7871794.

RH Passenger Side Hydraulic Line: 8N7871793.

Left Top Drive Cylinder: 8N7871795.

Right Top Drive Cylinder: 8N7871796.

Hydraulic Pump Assembly: 8N7871791.

Complete System Upgrade

Specific References

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