Bayern Munich completed a stunning Champions League semi-final mauling of Barcelona last night to set up a mouthwatering Wembley final against their long- time Bundesliga rivals Borussia Dortmund.

Leading 4-0 from the first leg, Bayern were similarly clinical at Camp Nou with second-half goals from Arjen Robben, Gerard Pique – who put through his own net – and Thomas Mueller sealing a one-sided win over the Catalan side for whom world player of the year Lionel Messi was an unused substitute.

The victory puts Bayern through to their third final in four years and they will hope to improve on their runner-up finishes against Inter Milan in 2010 and Chelsea last year when they face Real Madrid's conquerors Dortmund – in the competition's first all-German final – on May 25.

Barca were up against it with only three teams ever having overturned a four-goal first-leg deficit in Europe, and their chances of joining that list looked even slimmer after Messi was judged not fit enough to start the game.

The Argentina forward has been struggling with a hamstring problem in recent weeks and, although he scored after appearing as a second-half substitute in Saturday's Primera Liga draw with Athletic Bilbao, coach Tito Vilanova opted only to name him on the bench.

Even with Messi in their side, Barca barely troubled Bayern during the first leg, and it was the German champions who dominated the early exchanges, as well.

Robben and Philipp Lahm both looked poised to give Bayern what would almost certainly have been a tie-ending away goal in the opening 20 minutes but Pique produced brilliant, last-ditch tackles to deny both players.

Barca's first serious threat on goal came in the 24th minute when Pedro Rodriguez saw his 30-yard drive tipped over by Manuel Neuer as it arrowed towards the top corner.

Two minutes later, Xavi volleyed a decent opening over the top from seven yards out while Adriano drew a relatively comfortable save from Neuer in the 40th minute, but those were rare moments of concern for Bayern in the opening period.

Barcelona remained unchanged at the start of the second half with Messi continuing on the bench, but any hopes the world's best player might later inspire an unlikely fightback disappeared three minutes after the restart as Bayern took the lead.

Robben picked up a long, cross-field pass from David Alaba out near the right touchline before racing into the area where he cut inside Adriano on to his favoured left foot and curled an unstoppable shot past the Barca goalkeeper Victor Valdes inside the far post.

That away goal left Barca needing to score six times to go through to a fourth final in eight years, and it proved well beyond them.

With the tie gone, Vilanova opted to keep Messi under wraps and his first two changes were to send on Alexis Sanchez and Thiago for Spain duo Xavi and Andres Iniesta.

Despite those changes Bayern continued to look comfortable and they doubled their advantage 18 minutes from time.

Franck Ribery got in behind Dani Alves down the left and his cross was sliced into his own net by Pique with Mario Mandzukic lurking menacingly behind.

Ribery was also involved four minutes later as Bayern heaped more misery on Barca with a third goal.

The home side had actually come close to making it 2-1 moments earlier when Villa's glancing header hit the outside of a post, but it was game, set and match for the Germans in the 76th minute when Ribery burst past Alex Song before dinking a cross to the far post where Mueller climbed highest to head the ball high into the net.

Barca, who were last defeated in both legs of a European knock-out tie by Dundee United in 1987, tried to find a consolation goal late on but Jupp Heynckes' side held firm to record a 22nd win from their last 23 competitive games and seal their spot in the final at Wembley later this month.

"We played an outstanding game but there is a difference in Barcelona with and without Messi," Heynckes said after the game. "But it is a result that no-one could not forecast."

"I know the philsophy of Barcelona and my team understood extremely well how to deploy our tactics. It was harder than it looked. My team was very focused . . . we knew what we were up against."