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F13 640d grand tourer — 380hp stage 1 remap, the best kept secret

OOlaf

@oilburner_olaf

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The F13 640d with the N57 3.0L diesel engine is one of the most underrated BMWs you can buy. Stock it makes 313hp and 630Nm. With a stage 1 ECU remap it pushes to 380hp and 750Nm. That is serious torque in a beautiful grand tourer.

I bought mine with 95k km for 18k EUR. After the remap, the car is transformed. The midrange pull is incredible — overtaking on the highway requires zero effort. The 8-speed ZF gearbox shifts smoothly and a TCU tune makes it even better.

Fuel economy is surprisingly good for a car this size — 7-8L per 100km on the highway at 130 km/h. The N57 diesel is efficient and the tall gearing helps.

The F13 6 Series is depreciating heavily which makes it a bargain. You get a beautiful GT car with a fantastic engine for the price of a new Golf GTI. The only downside is maintenance costs — it is still a big BMW with complex systems.

Common issues to watch: air suspension compressor failure, N57 timing chain wear at high mileage, and the usual diesel emissions system maintenance (DPF, EGR).

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  1. #1
    OOlaf

    @oilburner_olaf

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    The F13 640d is one of the best grand tourers BMW ever made. The N57 triple-turbo diesel in the 640d makes incredible torque — 630Nm stock, and with a stage 1 remap you can push past 700Nm easily. I had mine remapped to 370hp and the midrange pull is addictive. Watch out for the adaptive suspension — the air springs on the rear axle are known to leak after 80-100k km. Budget around 800 EUR per side for replacement. Also check the timing chain tensioner on the N57 — BMW issued a service action for early production models.

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    TTorqueTony

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    Owned an F06 640d Gran Coupe for 3 years. Beautiful car but maintenance costs are not cheap. The DPF on the N57 can be problematic — mine needed a forced regen every 500km towards the end. Eventually did a DPF delete with ECU remap and the car transformed. Fuel consumption dropped from 8.5 to 7.2L/100km and the exhaust note became much deeper. If you are buying used, get one with full BMW service history and check the turbo actuators — the electric wastegate motors fail and BMW wants 1200 EUR per turbo to replace them.

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