Engine Mounts - All

Complete replacement of all engine mounts on the 2017 Audi R8 5.2L V10 Performance, requiring engine support and removal of subframe components to access the mounts.

Warnings

Tools required

Parts

• Left engine mount × 1 — 420 199 381 G or equivalent OEM
• Right engine mount × 1 — 420 199 382 G or equivalent OEM
• Rear engine mount × 1 — Use OEM specification
• Front engine mount (if equipped) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Disconnect negative battery terminal and wait 10 minutes for airbag system capacitors to discharge.
3. Remove engine cover panels from rear engine bay by releasing quick-release fasteners.
4. Raise vehicle on lift or securely support on jack stands at all four corners with wheels removed.
5. Remove rear undertray panels to access engine mounts from below (typically secured with T25 and T30 Torx fasteners).
6. Remove side undertray panels for access to left and right mounts.
7. Install engine support fixture across engine bay or attach overhead hoist to engine lift points (check service manual for approved lift point locations on this engine).
8. Take up slack on engine support to bear slight weight, but do not lift engine yet.

Procedure

1. 1

   Document engine position and remove heat shields
   Before disturbing any mounts, mark the current engine position relative to the subframe using a paint marker or take reference measurements. This will aid in alignment during reinstallation. Remove any heat shields covering the engine mounts (typically secured with E8 or E10 E-Torx bolts). The left and right mounts may have aluminum heat shields; the rear mount may have an additional metal heat shield (verify material and fastener type against service documentation). Note: 4S0 199 381 or equivalent OEM (verify against Audi parts catalog for Type 4S chassis)
2. 2

   Disconnect electrical connections and vacuum lines near mounts
   Inspect around each engine mount location for any electrical connectors, vacuum lines, or coolant hoses that may interfere with mount removal or engine movement. Disconnect and secure these components away from the work area. Common items may include wiring harness brackets and hoses; verify the specific components near each mount against service documentation for this engine. Note the routing for reassembly. Note: 4S0 199 382 or equivalent OEM (verify against Audi parts catalog for Type 4S chassis)
   Torque spec

   Electrical Connector Bolts7 Nm (5 lb-ft)
3. 3

   Remove left engine mount through-bolt
   Locate the left engine mount on the driver's side of the engine. Apply penetrating oil to the through-bolt that passes horizontally through the mount assembly. Using the correct drive type and size (verify against Audi documentation — Audi mount fasteners are often triple-square/XZN or E-Torx rather than standard hex) and a breaker bar, remove the through-bolt. Support the bolt as it exits to prevent it from falling. The mount will remain captured between engine bracket and subframe mount.
   Torque spec

   Engine Mount Through-Bolt88 Nm (65 lb-ft)
4. 4

   Remove left engine mount-to-frame bolts
   With the through-bolt removed, locate the bolts securing the mount's subframe bracket to the vehicle frame (typically 3-4 bolts accessible from below). These are usually 16mm or 17mm and may be secured with E-Torx or standard hex heads. Remove these bolts and lower the mount bracket. The engine-side bracket will remain attached to the engine.
   Torque spec

   Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
5. 5

   Remove left engine mount from engine bracket
   Remove the bolts securing the mount to the engine bracket (typically 2-3 bolts accessible from above through the engine bay). Once removed, extract the left engine mount assembly. Inspect the engine bracket for cracks or damage.
   Torque spec

   Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
6. 6

   Remove right engine mount through-bolt
   Repeat the process for the right (passenger side) engine mount. Apply penetrating oil and remove the through-bolt using appropriate tools. The right mount may have additional heat shielding or components nearby requiring care during removal.
   Torque spec

   Engine Mount Through-Bolt88 Nm (65 lb-ft)
7. 7

   Remove right engine mount-to-frame bolts
   Remove the bolts securing the right mount's subframe bracket to the vehicle frame from underneath. These fasteners follow the same pattern as the left side. Lower the mount bracket once all fasteners are removed.
   Torque spec

   Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
8. 8

   Remove right engine mount from engine bracket
   Access the engine bay from above and remove the bolts securing the right mount to the engine bracket. Extract the right engine mount assembly and inspect the bracket.
   Torque spec

   Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
9. 9

   Support engine weight and remove rear mount through-bolt
   With both side mounts removed, the engine is now supported only by the rear mount and your support fixture. Verify the engine support is properly bearing the engine weight. Locate the rear engine mount per the Audi 4S service manual (confirm its exact position relative to the engine, transaxle, and rear subframe before proceeding). Apply penetrating oil and remove the rear mount through-bolt.
   Torque spec

   Engine Mount Through-Bolt88 Nm (65 lb-ft)
10. 10

    Remove rear engine mount assembly
    Remove the mounting bolts securing the rear mount to both the engine bracket and the transmission/subframe bracket. The rear mount typically has 2-3 bolts on each side. Carefully extract the rear mount assembly, maneuvering it out of the confined space. You may need to slightly adjust engine position using the support fixture to create clearance.
    Torque spec

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
11. 11

    Inspect and remove front mount if equipped
    The 2017 R8 V10 Performance mid-engine layout may use a torque/pendulum mount in addition to the primary mounts. Confirm the exact number and location of mounts against Audi service documentation before ordering a front mount. If present, locate it at the front of the engine/transmission assembly. Remove the through-bolt first, then the mounting bracket bolts following the same procedure as the other mounts. If no front mount is present, proceed to installation. Note: Confirm the total number of engine/transmission mounts against the Audi 4S service manual before proceeding. If an additional torque-reaction mount is present, locate it per the manual, remove the through-bolt first, then the bracket bolts following the same procedure. If no additional mount is present, proceed to installation.
    Torque spec

    Engine Mount Through-Bolt88 Nm (65 lb-ft)

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
12. 12

    Install new rear engine mount
    Begin reassembly with the rear mount. Position the new rear mount between the engine bracket and transmission/subframe bracket. Install and hand-tighten the mount-to-frame bolts first, then the mount-to-engine bolts. Install the through-bolt hand-tight. Do not torque any fasteners yet.
    Torque spec

    Engine Mount Through-Bolt88 Nm (65 lb-ft)

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
13. 13

    Install new right engine mount
    Position the new right engine mount on the engine bracket and install the mounting bolts hand-tight. Lower the subframe bracket into position and install those bolts hand-tight. Install the through-bolt hand-tight. Verify the mount is properly seated in all brackets.
    Torque spec

    Engine Mount Through-Bolt88 Nm (65 lb-ft)

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
14. 14

    Install new left engine mount
    Position the new left engine mount on the engine bracket and install the mounting bolts hand-tight. Install the subframe bracket bolts hand-tight, then install the through-bolt hand-tight. All mounts should now be in position but not torqued.
    Torque spec

    Engine Mount Through-Bolt88 Nm (65 lb-ft)

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
15. 15

    Install front mount if equipped
    If the vehicle is equipped with a front stabilizer mount, install it following the same procedure: position the mount, install all mounting bolts and through-bolt hand-tight.
    Torque spec

    Engine Mount Through-Bolt88 Nm (65 lb-ft)

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
16. 16

    Align engine to reference marks
    Using the engine support fixture, carefully adjust the engine position to align with the reference marks made during disassembly. The engine should be centered in the engine bay with equal gaps on both sides. Use a pry bar if necessary to make fine adjustments. This step is critical for proper driveline alignment and vibration control.
17. 17

    Torque all mount fasteners in sequence
    With the engine properly positioned, torque all fasteners in the following sequence: First, torque all mount-to-frame bolts on all mounts to the Audi-specified value for this chassis (verify in service manual; many are torque-plus-angle). Second, torque all mount-to-engine bracket bolts to spec. Finally, torque all through-bolts to spec. Confirm whether any fasteners are single-use stretch bolts requiring replacement. This sequence ensures proper load distribution across all mounts. Note: First, torque all mount-to-frame bolts on all mounts to the factory-specified value (verify in Audi 4S service manual). Second, torque all mount-to-engine bracket bolts to the factory-specified value. Finally, torque all through-bolts to the factory-specified value, observing any torque-angle stages. Do not use assumed values — confirm each against official Audi documentation.
    Torque spec

    Engine Mount Through-Bolt88 Nm (65 lb-ft)

    Engine Mount-to-Frame Bolts61 Nm (45 lb-ft)
18. 18

    Reinstall heat shields and accessories
    Reinstall all heat shields removed during disassembly, torquing E-Torx fasteners to appropriate specifications (typically 10-15 Nm for shield fasteners). Reconnect any electrical connectors, vacuum lines, and wiring harness brackets that were disconnected.
    Torque spec

    Electrical Connector Bolts7 Nm (5 lb-ft)
19. 19

    Remove engine support and reinstall underbody panels
    Carefully remove the engine support fixture or hoist, ensuring the engine settles properly onto the new mounts. Reinstall all undertray panels and secure with their original Torx fasteners. Reinstall wheels if removed and torque to specification.

Reassembly

1. Reinstall engine cover panels in the rear engine bay, ensuring all quick-release fasteners are fully seated.
2. Reconnect the negative battery terminal and torque to 7 Nm (5 lb-ft).
3. Reset any fault codes that may have been stored due to battery disconnection using an OBD-II scanner.
4. Lower vehicle from lift or jack stands.

Verification

• Start the engine and allow it to idle. Listen for any unusual noises or vibrations that might indicate improper mount installation or alignment.
• With the engine running, have an assistant shift through all gear positions (Park, Reverse, Neutral, Drive) while you observe the engine for excessive movement. The engine should move slightly but smoothly without harsh jolts.
• Test drive the vehicle at various speeds and observe for vibrations, particularly at idle and during acceleration. Excessive vibration may indicate a mount was not properly torqued or the engine is misaligned.
• Perform a final visual inspection underneath the vehicle to verify all mount bolts are secure and all undertray panels are properly installed.
• Check that no tools or parts were left in the engine bay or under the vehicle.

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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