2009 BMW 3-Series

2009 BMW 3-Series

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Photos by -Autonet.ca
Glen Woodcock
Published: 05 01 2009

Adding diesel to the performance mix

MERRICKVILLE, Ont. – The BMW 3 Series is one of the world’s sweetest cars – that’s a fact few drivers would dispute.

Many of those same people, however, will put up a fight over what I’m about to tell you next: it’s even sweeter with a diesel engine.

The 3.0-litre, inline six diesel engine is also available in the xDrive35d version of BMW’s luxurious X5 SUV (or SAV, for sport activity vehicle, in BMW-speak). It’s the first of BMW’s advanced diesels with BluePerformance to be sold in Canada although it powers a wide range of European models and has been named International Engine of the Year several times.

It’s not only efficient, thanks to the precise fuel management of its third-generation common rail direct-injection, but clean burning and in full compliance with emissions standards in Canada and all 50 U.S. states.

Like other BluePerformance diesels, this one utilizes an oxidation catalyst placed close to the engine, a particulate filter housed in the same unit and an SCR (Selective Catalytic Reduction) catalyst with urea injection. This combination effectively reduces nitrogen oxides (NOx) through a chemical reaction in the exhaust system that’s initiated by injecting a small amount of urea called AdBlue. BMW says the ammonia generated in this process converts the NOx in the exhaust gas into environmentally friendly nitrogen and water vapour.

AdBlue is non-toxic and non-flammable and anyone can refill the easily accessible tank – you don’t have to take the vehicle back to the dealership.

The engine will not run if it is out of AdBlue. First a yellow warning light will signal that the level is getting low, then a red warning light will signal the car’s got about 300 km of travel left before the engine cannot be restarted.

Because AdBlue freezes at -12C, the 335d has two tanks – a larger one holding 17 litres that acts as the main reservoir and a smaller one holding six litres that is electrically heated. This technology has been used on large trucks for some time, so AdBlue is readily available at truck stops. The tank hold 23 litres, which should last the whole oil change cycle of 20,000-24,000 km.

Tom Baloga, VP of engineering for BMW North America, says his company’s clean engine strategy was developed first and foremost to reduce CO2 emissions while improving fuel economy and preserving driving performance.

Considerable engineering effort has gone into making this engine run more quietly for sensitive North American ears. For instance, all 335d models sold here will have a host of noise reduction features not necessary in Europe, including a panel under the vehicle that also improves aerodynamics.

The 3.0-litre diesel uses sequential twin turbo technology rather than the parallel turbochargers found on BMW’s gasoline engines. As a result, there’s no turbo lag evident when driving either this vehicle or the X5 xDrive35d. Both are mated to a six-speed automatic transmission normally used with V8s, in order to handle the diesel’s 425 lb.-ft. of torque at 1,750 rpm.

Totally unrelated to the diesel’s performance is the 335d’s ability in the snow, which is surprisingly good for a rear-wheel-drive vehicle. Riding on fat Bridgestone Blizzak winter radials, the 335d tracked (mostly) true through the snow-covered back roads of the Ottawa Valley. The only time it didn’t was the result of driver error when I forgot I was driving an RWD car and either neglected to slow down in tight corners or applied too much throttle and the rear end started to slide. But with traction control and dynamic stability control the sedan recovered nicely when I eased off the accelerator.

Like all 3 Series variants, the car has a hugely comfortable cabin with great seats that include power extenders to support the longer legs of taller drivers and front passengers.

Those who haven’t driven a modern diesel will be astounded at the quietness of the cabin and will also be amazed by the tremendous low-end torque and speed generated by this engine. I thought it felt remarkably robust (as it should with all that low-end torque), but also very fast.

BMW’s test data back up my driving impression. The 335i can sprint from 0-100 in 5.7 seconds and the 335d isn’t far behind, with a time of 6.2 seconds. And BMW says the diesel offers substantially improved fuel economy over the gas model – 35.3% more in the city and 26.9% on the highway.

BMW’s most popular car, worldwide, is the 320d sedan, so are there more oil-burners from Stuttgart in our future?

“We’d love to bring more diesels to North America,” says Baloga. “We’ll see how the market reacts to these.”

If consumers are smart – and I think they are these days – the 335d will be big successes.

Especially with a base MSRP of $49,700 – just $700 more than the gasoline-powered 335i.

Summary:

Year/Make/Model
2009 BMW 3-Series
Trim level
335d
Price range
$49,700 - $61,400
Freight
$1,995
Options
sport seats; sport suspension; heated steering wheel, navigation system; rear parking assist; audiophile sound package; auto-dimming exterior mirrors; burl walnut wood trim
Warranty (basic)
4 years/80,000 km (comprehensive)
Competitors
Mercedes-Benz E320 Bluetec

Strong Points

Weak Points

  • - fuel economy
  • - tons of torque
  • - low emissions
  • - price of diesel
  • - added maintenance

Editors Rating:

Fuel consumption
Outstanding, especially on the highway.
Value for price
High style plus lots of technology.
Styling
It's a 3 Series – nuff said.
Comfort
Quiet cabin; great seats; ease of operation.
Performance
Leaves most gas-burners in its wake.
overall
Will change your mind about diesels.

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