BYD Song Max DM Parts
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Symptom Finder: Known Weak Points
| What you see or hear | Check first |
|---|---|
| The car will not charge from a plug | The charging socket, the cable and the 3.3 kW on-board charger. The car charges on alternating current only, so check these before suspecting the battery, then match by OE number. |
| Engine warning light while the petrol engine is running | Start with the lambda sensors and the turbo boost hoses. Read the build date first, since China 5 and China 6 cars can use different emission parts. |
| Harsh, slow or jerky gear changes | The dual-clutch gearbox fluid and filter first, then the clutch and its control parts. Have the gearbox checked before ordering clutch parts. |
| Parking brake warning, or the parking brake will not release | The electric parking brake motor on the rear caliper and its connector. Order a replacement caliper as the electric parking brake type for the correct side. |
| Brake discs rusting or scored rather than worn thin | Common on plug-in cars that brake mostly on the motor. Replace discs and pads as a set per axle, matched by OE number. |
| Coolant level falling or a temperature warning | Hoses, the expansion tank and the temperature sensors. The car cools a turbo engine as well as its hybrid hardware, so trace the leak to its circuit before ordering. |
| Knock or clunk from the rear over bumps | The torsion beam bushes and the rear dampers. The rear axle carries a full MPV load, so inspect the bushes for splits before ordering. |
Most Replaced Parts on the Song Max DM
- Coolant hoses, tanks and sensorsCooling for a turbo engine and hybrid hardware, so trace any leak to its circuit first
- Fuel tank, lines and filtersA full petrol system on a car that may run on electric power for weeks
- Brake discs and padsVentilated front discs, rear discs with the electric parking brake built into the caliper
- Springs and top mountsStrut springs and top mounts at the front, a torsion beam carrying the rear
- Gaskets and sealsA 1,497 cc turbocharged direct-injection engine that starts and stops many times a trip
About BYD Song Max DM Parts
The BYD Song Max DM is the plug-in hybrid version of the Song Max MPV. It was first shown at the Guangzhou motor show in November 2018 and went on sale in March 2019. It seats six or seven on a 2,785 mm wheelbase and drives the front wheels. The drive combines a 1,497 cc turbocharged petrol engine and a six-speed dual-clutch gearbox with a 110 kW electric motor, and the battery came in two sizes, 9.98 kWh and 15.98 kWh. That layout means the car needs two sets of parts. One is the oil, filters, fuel system and emission sensors of a turbo petrol engine. The other is the battery, charging and motor hardware of a plug-in car. In March 2022 the Song Max DM-i replaced it, keeping the body but not the drive. Every part on this page is listed by its OE number, and that number is the surest way to confirm a part fits.
What to know before buying BYD Song Max DM parts
Start by making sure the car is a Song Max DM. The petrol Song Max has no charging socket, so a charging flap narrows it to the DM or the DM-i that replaced it in March 2022. All three share the same basic MPV body on a 2,785 mm wheelbase, and the DM measures 4,680 mm long, 1,810 mm wide and 1,680 mm high, so the shape alone will not tell them apart. The build date on the identification plate will. Some body panels and trim may be shared across the family, but the engine, gearbox, battery and charging hardware are specific to the DM, so match those by OE number and never by model name.
Under the bonnet, the DM has a 1,497 cc turbocharged petrol engine with a six-speed dual-clutch gearbox. The DM-i uses a naturally aspirated engine and an E-CVT, so the DM's clutch, gearbox and turbo parts have no match on it, and DM-i service parts do not suit the DM.
Two engine ratings exist within the same 2019 model year. Early cars built to the China 5 emission standard have 113 kW, and cars built to China 6 use the BYD476ZQB engine at 118 kW. Emission sensors and some engine ancillaries can differ between the two, so read the build date on the identification plate before ordering anything on the engine side.
The battery came in two sizes, 9.98 kWh for 51 km of electric range and 15.98 kWh for 81 km. Both charge on alternating current only, through a 3.3 kW on-board charger. The packs are different parts, so confirm which one is fitted before ordering battery-side hardware.
Wheels came in two sizes, 225/55 R17 and 225/50 R18, so read the tyre sidewall rather than guessing from the trim. The brakes are ventilated discs at the front and discs at the rear, with an electric parking brake, so a rear caliper must be the electric parking brake type for the correct side.
Finally, check what varies from car to car. The DM was built with six or seven seats, and some versions have a powered tailgate while others do not. Check the seat count and how the tailgate opens before ordering cabin or tailgate parts. For painted panels, order by the colour code on the car rather than by colour name.
Before You Order: 8 Checks
- Look for a charging flap and read the build date on the identification plate. A plug-in Song Max built before March 2022 is a DM, so order drive parts for the DM rather than the DM-i.
- Match the OE number on the part you are replacing to the OE number on the listing. A matching number is the surest check that a part fits.
- Read the build date before ordering engine or emission parts, since China 5 cars have a 113 kW engine and China 6 cars a 118 kW engine.
- Confirm whether the car has the 9.98 kWh or the 15.98 kWh battery before ordering any battery or charging part.
- Read the tyre size on the sidewall, 225/55 R17 or 225/50 R18, before ordering tyres or rims.
- Order a rear caliper as an electric parking brake unit for the correct side.
- Count the seats and check whether the tailgate is powered before ordering cabin or tailgate parts.
- Order painted panels by the colour code on the car rather than by colour name.
Generations and Facelifts
The Song Max DM belongs to the Song Max family, and the petrol Song Max came first. That car, an MPV on a 2,785 mm wheelbase, went on sale in September 2017. The plug-in hybrid DM was first shown at the Guangzhou motor show in November 2018, opened for pre-orders on 12 March 2019 and went on sale later that month. It kept the petrol car's body and added BYD's third-generation DM drive: a 1,497 cc turbocharged engine and six-speed dual-clutch gearbox at the front, a 110 kW motor, and a 9.98 kWh or 15.98 kWh battery.
The first cars were built to the China 5 emission standard with a 113 kW engine. China 6 versions followed with the BYD476ZQB engine at 118 kW, and spec listings show them from July 2019. All of them were sold as 2019 model-year cars, so the model year cannot separate the two builds. Match engine and emission parts by build date and OE number.
The petrol Song Max was facelifted in August 2020. The sources we checked show no matching facelift for the DM, so confirm front-end body parts by OE number rather than assuming a petrol-car part suits the DM.
The DM went out of production in March 2022, when the Song Max DM-i replaced it. The DM-i keeps the MPV body but uses a naturally aspirated engine, BYD's E-CVT hybrid drive and a Blade battery, so none of the DM's engine, gearbox or battery parts carry across. Before ordering engine, emission or battery parts, read the build date on the identification plate.
BYD Song Max DM Parts: Frequently Asked Questions
How do I make sure a part fits my Song Max DM?
Match the OE number. Every part on this site is listed under the OE number printed on the original part, and if the number on the part you are replacing matches the listing, the part fits. That matters on the Song Max DM because it shares its body with the petrol Song Max and the later DM-i, while its engine, gearbox and battery are its own. If the old part is missing or its number is unreadable, send the details through the quote form and we will reply within 24 hours, usually sooner.
How can I tell a Song Max DM from the DM-i or the petrol Song Max?
Look for the charging flap first. The petrol Song Max has none, so a car with a charging socket is either the DM or the DM-i. The DM was sold from March 2019 until March 2022, when the DM-i replaced it, so the build date on the identification plate is the simplest way to separate the two plug-in cars. Under the bonnet, the DM has a turbocharged 1,497 cc engine with a six-speed dual-clutch gearbox. Once you know which car you have, confirm each part by its OE number.
Will Song Max DM-i parts fit my Song Max DM?
Not for the drive. The DM-i uses a naturally aspirated engine with BYD's E-CVT hybrid drive and a Blade battery. The DM has a turbocharged engine, a six-speed dual-clutch gearbox and its own battery packs. Treat the engine, gearbox, battery, charging and cooling hardware as specific to the DM. The body is similar across the Song Max family, with the same 2,785 mm wheelbase, so some panels and trim may be shared. Check every part by OE number rather than by model name before you order.
Is the Song Max DM a Blade battery car?
No. The Blade battery reached the Song Max with the DM-i in 2022. The DM carries an earlier pack of 9.98 kWh or 15.98 kWh, fitted under the floor below the front seats, and none of its battery parts come from the Blade range. Published sources disagree on the cell chemistry, so do not order battery parts on chemistry alone. Confirm which of the two capacities your car has, then match any battery-side part by the OE number on the old one.
What are the two battery sizes, and do their parts interchange?
The 9.98 kWh pack gives 51 km of electric range on the NEDC cycle, and the 15.98 kWh pack gives 81 km. Both charge through the same 3.3 kW on-board charger, taking about three hours and five hours respectively from empty. The two packs are different parts, so do not assume battery modules, covers or mounting hardware cross between them. The range quoted for the car or the capacity on the battery label tells you which pack is fitted. Once you know, match battery-side parts by OE number.
Can the Song Max DM use a DC fast charger?
No. The Song Max DM charges on alternating current only, through a 3.3 kW on-board charger, and the sources we checked list no fast-charging option. A full charge takes about three hours for the 9.98 kWh car and five hours for the 15.98 kWh car. The on-board charger is the only route from a plug to the battery, so a car that will not charge at all points first to the charging socket, the cable and that charger. Check those before suspecting the battery, and match the replacement by OE number.
Why are there two engine outputs, and which one does my car have?
Early cars built to the China 5 emission standard have a 1,497 cc turbo engine rated at 113 kW. Cars built to the China 6 standard use the BYD476ZQB engine at 118 kW. Both drive the front wheels through a six-speed dual-clutch gearbox, but emission sensors, catalysts and some engine ancillaries can differ between the two standards. The model year cannot separate them, since both were sold as 2019 cars. Read the build date on the identification plate and match engine-side parts by OE number.
What tyre sizes does the Song Max DM use?
Two sizes were fitted: 225/55 R17 and 225/50 R18. In the spec listings we checked, the 17-inch size appears on the 51 km car and the 18-inch size on the 81 km car, but that is not a firm enough rule to order from, so read the size on the tyre sidewall before ordering tyres or rims. Match brake discs by OE number rather than by wheel size. If you are buying a second-hand wheel, check it for kerb damage and corrosion before it goes on the car.
What should I know before ordering rear brake parts?
The Song Max DM has ventilated discs at the front, discs at the rear and an electric parking brake. The parking brake motor works on the rear caliper, so a replacement rear caliper must be the electric parking brake type, ordered for the correct side. When you fit new rear pads, wind the piston back with a diagnostic tool or the car's service mode rather than forcing it by hand. Match discs, pads and calipers by the OE numbers on the old parts before you order.
Does the dual-clutch gearbox need its own parts?
Yes. The DM pairs its turbo engine with a six-speed dual-clutch gearbox, and this type of gearbox needs its own fluid and service parts. The later DM-i has no such gearbox, so do not use DM-i service parts or schedules on a DM. Match gearbox fluid, filters, seals and clutch parts to the DM by OE number. If the car changes gear harshly or slowly, have the gearbox checked before ordering clutch parts, because worn fluid or a control fault can cause the same symptoms.
Was the Song Max DM a six-seater or a seven-seater?
Both were built. The six-seat car has three rows of two seats, and the seven-seat car uses a different seat layout behind the front row. Seats, seat rails, trim panels and seat belts in the rear rows can differ between the two layouts, and the trim level can also change covers and adjustment. Count the seats in the car before ordering anything for the cabin, and then order each seat part by the OE number on the part you are replacing.
Does every Song Max DM have a powered tailgate?
No. Some versions were fitted with a powered tailgate and others were not, so look at how the tailgate on the car opens before ordering struts, a motor or a switch. A powered tailgate uses different struts and control parts from a manual one, and the two sets do not interchange. The tailgate on an MPV is large and opens often, so its struts are worth checking on older cars. Match any tailgate part to the OE number on the old part before you order.