Removing and installing air mass meter: Audi A8 D2 (AKF, BAT, BNK, BUB, …)

🧭 Before you start

Fits: Audi A8 D2 (4D)

• Renewed: gaskets

Don't miss

• Seal off inlet connections with clean cloths.
• Mark vacuum hoses (2) prior to disconnection.
• Fig. shows right exhaust gas recirculation valve with engine removed.
• Illustration shows engine removed.
• Do not use silicone spray or silicone-based lubricants, as the silicone could damage the air mass meters.

🔧 Engine codes this applies to

📋 Procedure

1. Remove engine cover .
2. Disconnect hose to air cleaner housing at top air pipe.
3. Remove top air pipe (arrows). [Note: Seal off inlet connections with clean cloths.]
4. Unscrew clamp (1).
5. Sever cable ties (arrows).

6. Mark vacuum hoses (2) prior to disconnection.
7. Disconnect vacuum hoses (2...5).
8. Screw out bolts (arrows) at mechanical exhaust gas recirculation valves on both sides. [Note: Fig. shows right exhaust gas recirculation valve with engine removed.]
9. Detach mechanical exhaust gas recirculation valves.
10. Pull out retaining clips (1) and (2) approx. 10 mm. [Note: Illustration shows engine removed.]
11. Detach rear air pipe first from left and then from right air mass meter.
12. Guide out rear air pipe upwards (arrows) with a twisting motion. [Note: Proceed as follows if rear air pipe cannot be removed:Turn clamps on connecting hoses slightly towards turbocharger so that ends of hose clamps no longer create an obstruction.Place a suitable wooden block on a trolley jack and position this behind ATF pan at gearbox housing.Use the trolley jack to raise the automatic gearbox slightly until the engine tilts forward somewhat, thus providing access to the bulkhead.]
13. Unfasten hose clamp (2) and detach air mass meter from air hose.
14. Unplug connector (1). [Note: Illustration shows engine removed.] [Note: Replace gaskets and seals.Hose connections and hoses must be free of oil and grease before fitting.]
15. Coat O-rings in rear air pipe with fuel. [Note: Do not use silicone spray or silicone-based lubricants, as the silicone could damage the air mass meters.]
16. Consecutively press the two air mass meters into the rear air pipe (the retaining clips (1) and (2) must be heard to engage).

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