Engine Code BBW
WARNING: This page is about a different variant/trim than selected.
Special tools, testers and auxiliary items required
- Torque wrench (5 to 50 Nm) VAG 1331
- Engine/transmission jack VAG 1383 A
- Textile or rubber mat
Requirement
- Fuel tank must be empty
Removing
NOTE:
- Observe safety precautions before starting work. Refer to Safety Precautions When Working on the Fuel Supply System under Safety precautions when working on fuel supply system .
- The fuel extraction unit VAS 5190 is recommended for emptying the fuel tank. Contrary to the operating instructions the draining must not occur via the filler neck in this engine/vehicle or inner components will be damaged. Empty fuel tank only via the open flange. Refer to Fuel Delivery Unit, Removing and Installing under Fuel delivery unit, removing and installing .
- Open fuel flap.
- Check whether a coded radio is installed. If so, obtain anti-theft coding.
- With ignition switched off disconnect battery Ground strap.
- Fold rear seat bench forward.
- Remove cover from fuel delivery unit.
- Disconnect 4-pin connector - 1 -.
- Unscrew nuts - 2 - and take flange - 3 - off.
- Drain fuel tank via flange opening, e.g. with VAS 5190.
- Bolt on flange again .
- Remove rear axle: Refer to 42 REAR SUSPENSION
- Remove rear part of exhaust system. .
- Remove right rear wheelhousing liner: Refer to 66 EXTERIOR EQUIPMENT
- Clean fuel filler neck and EVAP canister area.
- Remove tank flap unit with rubber cup - 1 -. Refer to TANK FLAP UNIT
- Pull vacuum hose for fuel system leak detection pump - 2 - off union.
- Remove 3-pin connector - 3 - and disconnect wiring.
- Pull pressure hose - 5 - off.
NOTE:
- To unlock, press the safety ring - arrow - into the EVAP canister.
- Remove fuel system leak detection pump - 4 - with detection pump air filter and bracket by pulling from center forward and then sliding downward.
- Pull breather lines - 3 - and - 4 - off by pressing safety rings at EVAP canister - arrows - on upper and lower part together and unclipping breather line - 3 - out of clip - 1 -.
- Remove bolts - 2 -.
- Unclip vacuum line - 1 - at fuel tank.
- Disconnect breather line - 2 -.
CAUTION:
- The fuel system is under pressure! Before opening the system place a cloth around the connection. Then release the pressure by carefully loosening the connection.
- Always wear eye protection and wear fuel-resistant gloves when disconnecting system connections.
- Loosen spring-type clamp - 3 - and pull supply hose off fuel line. Collect leaking oil.
- Seal lines to avoid contamination of fuel system.
- Support fuel tank with engine/transmission jack VAG 1383 A and unscrew bolts - arrows -.
NOTE:
- To prevent paintwork being damaged place a textile or rubber mat between fuel tank and jack.
- Lower fuel tank.
Installing
Installation is performed in reverse order to removal, considering the following:
- Tensioning strap rubber profile must not be damaged.
- Replace bolts - arrows -.
- Guide wirings on EVAP canister must be securely connected. Check for correct seat by tightening.
- Adapt (match) engine control module to throttle valve control module. Refer to Adapting Components and Functions under Components, checking .
- Generate readiness code again if DTC memory has been erased, refer to Adapting Components and Functions under Components, checking .