Removing and installing hydraulic control unit, 0BE, 0BF — AUDI

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017), Audi A5 Cabriolet (8F), Audi A8 D4 (4H, 2010–2017), Audi A5 (8T, 2007–2016), Audi A4 B8 (8K, 2007–2015), Audi A6/A7 C7 (4G, 2011–2018); platform codes 83, 4X

• Opens: gearbox oil

Don't miss

• A second mechanic is required for removing the rear section of the exhaust system.
• Mark connectors (2) for oil pressure and oil temperature senders and clutch valves.
• To loosen and tighten the nut for the pipe (right-side) at the hydraulic control unit , the all-wheel drive pump V415 must be removed.
• Carefully observe safety precautions when renewing hydraulic control unit. If possible the "“old”" senders must be re-installed .

📋 Procedure

1. Place vehicle on lifting platform.
2. Lower rear section of exhaust system slightly and secure; if necessary remove rear section of exhaust system 26Exhaust pipes/silencers; Exploded view - silencers. [Note: A second mechanic is required for removing the rear section of the exhaust system.]
3. If fitted, unscrew bolts (arrows) and detach bracket (1) for wiring harness from rear final drive. [Note: Mark connectors (2) for oil pressure and oil temperature senders and clutch valves.]
4. Unplug connectors (2) from oil pressure and oil temperature senders and clutch valves.
5. Then unplug connector (4) from all-wheel drive pump V415.

6. Subsequently, unclip wiring harness (3) from final drive and subframe (items 5 ... 7) and tie up.
7. Position drip tray under rear final drive.
8. Drain ATF from rear final drive .
9. Drain gear oil from rear final drive .
10. Remove all-wheel drive pump V415. [Note: To loosen and tighten the nut for the pipe (right-side) at the hydraulic control unit , the all-wheel drive pump V415 must be removed.]
11. Loosen pipe (left-side) (6) and pipe (right-side) (7) leading to hydraulic control unit (1) one turn (arrows A) and disconnect from superposition gears (arrows B).
12. Unscrew bolts (2 ... 5) and detach hydraulic control unit (1) with gasket. [Note: Carefully observe safety precautions when renewing hydraulic control unit. If possible the "“old”" senders must be re-installed .]
13. Install all-wheel drive pump V415.
14. Clip in wiring harness (3) at final drive and subframe (items 5 ... 7).
15. Plug in connectors (4) and (2), paying attention to marks made during removal for identification of oil pressure and oil temperature senders and clutch valves.
16. If fitted, install bracket (1) for wiring harness at rear final drive and tighten bolts (arrows) to specified torque. Take care not to trap wiring harness (3). [Note: Allocation of connectors for oil pressure and oil temperature senders and at clutch valves:(1) = connector for oil pressure and oil temperature sender 2G640(2) = connector for oil pressure and oil temperature sender G437(3) = connector for clutch valve 2 for all-wheel drive N446(4) = connector for clutch valve for all-wheel drive N445]
17. Fill up gear oil in rear final drive and check oil level .
18. Fill up ATF in rear final drive and check ATF level .
19. Install rear section of exhaust system and perform stress-free alignment 26Exhaust pipes/silencers; Exploded view - silencers.

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