Hamilton on pole, Vettel to start at back following engine problem
Raikkonen 2nd, Verstappen 3rd
Hamilton leads title race by 28 points
Race on 5 live and sport website - coverage from 06:30 BST
Qualifying at Sepang gets underway at 10:00 BST and you can listen to commentary on BBC Radio 5 live sports extra from 09:55 BST. Click the play icon at the top of the page to listen.
Full coverage details for across the weekend are available here.
Andrew Benson
BBC Sport’s chief F1 writer
Mercedes drivers will stay with same car specs as in final practice: Hamilton with the old spec, Bottas with new.
Mercedes mixed things up in final practice, giving Valtteri Bottas the upgraded aero package they had brought to Malaysia and giving Lewis Hamilton the old spec. The result was Bottas finishing two tenths quicker than Hamilton.
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Image source, EPAThere was a little bit of drama right at the end of final practice when Jolyon Palmer clipped Max Verstappen as they both took a corner.
Verstappen blamed Palmer while Palmer blamed Verstappen but stewards have decided to take no action.
Here's an odd one.
The Formula 4 Southeast Asia Championship event took place earlier this morning... without a single car making it to the finish.
It appears they all ran out of fuel with four cars stopping on lap six of the eight-lap race and three more halting on lap seven.
A future pub quiz question if I ever saw one.
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Image source, .Lewis Hamilton has taken four pole positions in Malaysia, three of those coming in the last three races.
A fifth pole position at Sepang is not looking likely for the championship leader, but Mercedes are always capable of finding that bit more.
Six tenths is quite a bit to make up, though.
Image source, .Qualifying today will be a tough one to call.
Fancy having a go? Make your predictions here.
Andrew Benson
BBC Sport’s chief F1 writer
Image source, Getty ImagesLewis Hamilton set only fifth fastest time in final practice and he was 0.659 seconds off the pace, set by Kimi Raikkonen.
Mercedes' performance is likely to be a major concern for the team, especially as their two cars were running in different specifications in the session in an attempt to understand the handling problems the drivers experienced on Friday.
An aerodynamic upgrade was taken off Hamilton's car but left on Bottas' - the team saying it was so they could "confirm our confidence in that kit".
The fact that Hamilton ended up slightly slower than Bottas, but should have been slightly faster, would be expected to leave them in a quandary - especially as this is a track on which at the very least they expected to be evenly matched with Ferrari.
One positive for Mercedes is that the gap to the front is much smaller than it was on Friday, when they were 1.4secs off the pace.
Yes, Kimi Raikkonen was fastest in final practice for the Malaysian Grand Prix.
The Finn led the way ahead of Sebastian Vettel, whose session came to a premature end because of an issue with the engine.
Ferrari are changing his engine as precaution but, as the tweet below says, he will incur no penalty.
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Both Mercedes off the pace.
An engine problem for Sebastian Vettel.
This guy though.
Image source, Getty Images
Image source, Getty ImagesSo, question marks remain over Mercedes' pace as they finished four tenths off the pace of Ferrari, although it was far from smooth sailing for Sebastian Vettel as an issue late on saw him slow down on the track.
Plenty to ponder before qualifying for a few teams then.
That gets under way at 10:00 BST, we'll be back at 09:00 for build up.
11) Alonso
12) Stroll
13) Magnussen
14) Hulkenberg
15) Sainz
16) Gasly
17) Palmer
18) Grosjean
19) Ericsson
20) Wehrlein
1) Raikkonen 1:31.880
2) Vettel +0.162
3) Ricciardo +0.211
4) Bottas +0.449
5) Hamilton +0.659
6) Verstappen +0.699
7) Perez +1.329
8) Massa +1.360
9) Ocon +1.410
10) Vandoorne +1.441
That's the chequered flag.
Kimi Raikkonen finishes quickest in final practice for the Malaysian Grand Prix.
Image source, AFP/Getty ImagesBoth were approaching the corner with Jolyon Palmer on the inside of Max Verstappen. Palmer locked up and clipped the back of Verstappen's Red Bull.
A strange incident on the track. Both Max Verstappen and Jolyon Palmer have spun.
"He hit me, what the hell," says Verstappen.
"What an idiot!" says Palmer.
Image source, Getty Images
Jennie Gow
BBC Radio 5 live pit-lane reporter
Sebastian Vettel is in the pits. The team are ready. It will be very interesting to see what work they do. Mercedes will probably be looking up at their screens and licking their lips slightly.
Sebastian Vettel is told initially to stop the car before then being asked to "keep the revs as they are" and bring it back to the Ferrari garage.
Image source, EPA