New BMW 4 Series 420i/430i Turbo – Ref. 49477-02407
- 100% secure online payment
- Delivery to your garage or home, anywhere in Europe
- 12-month parts warranty
- Reconditioned and checked turbo
- Part
- Turbo
- Part type
- New turbo
- Make
- BMW
- Model
- 4 Series
- Engine
- 420i, 428i xDrive, 430i, 430i xDrive
- Fuel
- Petrol
- Equivalent references
- 49477-02407, 49477-02401, 49477-02402, 49477-02403, 49477-02410, 49477-02411, 11657637593
- Warranty
- 12 months
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How a healthy turbo transforms your BMW 4 Series
On a BMW 4 Series fitted with the B48B20 petrol engine, a turbo in perfect condition delivers an immediate, crisp response from low revs, smooth linear power delivery all the way to the redline, and a complete absence of smoke or whistling under acceleration. Conversely, a worn turbo makes itself known through a noticeable loss of power, an unusual whistling noise under the bonnet, or excessive oil consumption. Fitting a new turbo compatible with reference 49477-02407 restores the original driving feel that makes this sporty saloon and coupé so rewarding.
Compatibility of the new turbo with the BMW 4 Series
This new turbo is compatible with the 420i, 428i xDrive, 430i and 430i xDrive petrol variants of the BMW 4 Series, fitted with the B48B20 engine with a capacity of 1998 cm3. Before placing an order, we strongly recommend checking the reference printed on the old turbo fitted to your vehicle to confirm exact compatibility with your engine code.
Warranty and delivery for the BMW 4 Series turbo
This new turbo is sold as a straightforward purchase with no exchange: there is nothing to return, your old turbo stays with you, and only one delivery is made. The new turbo comes with a 12-month parts warranty, subject to fitting by a qualified professional. Payment can be spread over multiple instalments, in up to 10 instalments.
Fitting and maintenance advice for the B48B20
On the B48B20 engine, premature turbo failure is most commonly caused by lubrication issues — poor-quality engine oil, missed oil changes, or a clogged air filter allowing contaminants to reach the compressor wheel. A cracked intercooler or a poorly secured hose can also cause pressure loss that is detrimental to the turbo's operation.
- Check the condition of the oil circuit and replace the filter before fitting
- Check the hoses and hose clips for leaks
- Inspect the air intake and intercooler to rule out any leaks
- Prime the turbo with oil before first start-up
- Drive gently during the first few kilometres after installation
This same turbo also fits
How a healthy turbo transforms your BMW 4 Series
On a BMW 4 Series fitted with the B48B20 petrol engine, a turbo in perfect condition delivers an immediate, crisp response from low revs, smooth linear power delivery all the way to the redline, and a complete absence of smoke or whistling under acceleration. Conversely, a worn turbo makes itself known through a noticeable loss of power, an unusual whistling noise under the bonnet, or excessive oil consumption. Fitting a new turbo compatible with reference 49477-02407 restores the original driving feel that makes this sporty saloon and coupé so rewarding.
Compatibility of the new turbo with the BMW 4 Series
This new turbo is compatible with the 420i, 428i xDrive, 430i and 430i xDrive petrol variants of the BMW 4 Series, fitted with the B48B20 engine with a capacity of 1998 cm3. Before placing an order, we strongly recommend checking the reference printed on the old turbo fitted to your vehicle to confirm exact compatibility with your engine code.
Warranty and delivery for the BMW 4 Series turbo
This new turbo is sold as a straightforward purchase with no exchange: there is nothing to return, your old turbo stays with you, and only one delivery is made. The new turbo comes with a 12-month parts warranty, subject to fitting by a qualified professional. Payment can be spread over multiple instalments, in up to 10 instalments.
Fitting and maintenance advice for the B48B20
On the B48B20 engine, premature turbo failure is most commonly caused by lubrication issues — poor-quality engine oil, missed oil changes, or a clogged air filter allowing contaminants to reach the compressor wheel. A cracked intercooler or a poorly secured hose can also cause pressure loss that is detrimental to the turbo's operation.
- Check the condition of the oil circuit and replace the filter before fitting
- Check the hoses and hose clips for leaks
- Inspect the air intake and intercooler to rule out any leaks
- Prime the turbo with oil before first start-up
- Drive gently during the first few kilometres after installation
This same turbo also fits
Frequently asked questions
Everything you need to know before ordering your part.
