BYD Song Plus Buying Guide: What to Check Before You Buy

The BYD Song Plus is a compact plug-in hybrid and battery electric SUV that has been produced in China since September 2020, and the checks that matter before purchase are the same in every market: confirm which of the five powertrain versions the car actually is, verify battery condition with a dated health report, match the VIN to the paperwork, and remember that the same vehicle is sold abroad as the BYD Seal U in Europe and the BYD Sealion 6 in Australia, New Zealand and Southeast Asia. Production of the Song Plus for the Chinese domestic market ended in January 2026, when the nameplate was retired in favour of the Sealion 06, so buyers in 2026 are choosing from late-series cars, export stock and overseas-assembled units. This guide sets out a version map, a physical inspection checklist and a documentation routine that dealers, importers and private buyers can apply before money changes hands.

Know exactly which Song Plus is on the table

The Song Plus name covers two powertrains and five headline versions, and quoting the wrong one is the most common error in export negotiations. The plug-in hybrid DM-i line pairs a 74 kW naturally aspirated 1.5 litre petrol engine with a 160 kW, 260 Nm front electric motor, and it is offered with three battery sizes. The EV line is a pure battery electric drivetrain with two pack options. The table below lists the versions sold from the 2023 Champion Edition and the 2024 facelift onwards, with range figures on the standard each rating was published on.

Three points follow from this table. First, NEDC, WLTC and CLTC are different test cycles and the numbers are not interchangeable, so a quotation that mixes them is a quotation to re-check. Second, the wheelbase is 2,765 mm and overall length spans roughly 4,705 to 4,785 mm depending on the model year and bumper design, which places the car firmly in the compact SUV class rather than the mid-size class some listings claim. Third, the one-millionth Song Plus rolled off the line in July 2024, which means parts circulation for high-volume versions is deep, while low-volume combinations deserve a parts check before purchase.

The same car carries three names

Nameplate geography matters more on this model than on almost any other Chinese SUV. In Europe the car is marketed as the BYD Seal U, with the Comfort version using the 71.8 kWh pack and the Design version using the 87 kWh pack, and with WLTP rather than CLTC as the published cycle. In Australia, New Zealand and much of Southeast Asia it is the BYD Sealion 6, and an Extended variant announced for the Thai market in August 2026 pairs the 26.6 kWh battery with a 150 km electric range rating and 55 kW DC charging. In China the Song Plus badge was withdrawn from the domestic line-up in January 2026, with the Sealion 06 taking its place, although overseas sale of Sealion 6 versions continues.

Assembly location is the second layer of geography. The Song Plus has been built in Xi'an in China, at the UzAuto Motors plant in Uzbekistan since 2024, and at BYD's Rayong plant in Thailand since 2024. For an importer, the assembly country affects the certificate of origin, duty treatment and the language of the owner documentation, so the build plant shown in the VIN decode should match the trade paperwork. When a seller describes a "Seal U" that turns out to carry Song Plus documents, treat the mismatch as a finding to resolve, not a formality.

The pre-purchase inspection checklist

A structured inspection beats a walk-around opinion, particularly on a plug-in hybrid that may have covered uncertain mileage in electric mode. Work through the checklist below in order and photograph each item, because a dated photo file is the cheapest insurance in any cross-border purchase.

Checks that matter on every Song Plus

• Battery health report from a diagnostic tool, with state of health, cell balance and full-charge capacity, not just a dashboard state of charge.
• Charge test: one AC session and, if the seller permits, one DC session, recording delivered power against the rated figure for that version.
• Body and paint survey panel by panel, with a paint thickness gauge on the tailgate, rear quarters and roof edges where repair damage concentrates.
• Chassis and underbody inspection on a lift, covering the battery enclosure, coolant lines and suspension mounting points.
• Software version check on the infotainment system, and a note of any recalls or service campaigns the seller can evidence.
• Tyre brand, size, date codes and even wear across both axles.

Extra checks for DM-i versions

A DM-i car has two energy counters, and both matter. Record the total mileage, the electric-only mileage if the trip system exposes it, and any engine-hours reading a diagnostic tool can pull, because a hybrid that has run almost exclusively as an EV may still need engine-side servicing on the calendar. Check the fuel system by asking when the tank was last filled and cycled, inspect the engine oil condition on the dipstick, and confirm the engine engages smoothly when battery charge is deliberately drawn down during the drive. A DM-i that shudders, refuses to start its engine or shows a maintenance warning at low state of charge is a car to pause on.

Extra checks for EV versions

On the EV 520 and EV 605, the battery is the single largest value item, so the health report deserves extra scrutiny. Ask for a charge log or the vehicle's stored charging history if the software allows it, look for a consistent balance between cell groups, and confirm the heat management behaves sensibly on a fast charge rather than derating abruptly. Verify that the charge port, cable seals and the vehicle-to-load function where fitted all operate, because replacing charging hardware on an export unit is slower than checking it.

Paperwork: prove the car before you pay

Documentation failures cost more time than mechanical failures in cross-border used-car trade. For a Song Plus purchase, the minimum file contains the vehicle certificate or certificate of conformity appropriate to the assembly plant, an invoice that names the seller and the VIN, the maintenance record with stamps or digital entries, a battery health report dated close to the sale, and the export paperwork trail if the car is already outside its first market. Decode the VIN against the seller's claims for model year, assembly plant and drivetrain before the inspection, so the physical car can be checked against a written expectation rather than a memory of one.

Importers should also confirm destination-market questions on their side: homologation acceptance for a China-cycle CLTC rating, charging plug compatibility, warranty transferability, and service coverage for the specific version. None of these is the seller's problem to solve, and all of them are the buyer's problem to have solved before the deposit. AutoCN's sourcing guides and price frameworks cover these steps in more depth without inventing quotations.

A cost frame without invented numbers

No honest article can print "the" Song Plus price, because the figure the buyer cares about is a stack of four different numbers: the Chinese MSRP the version carried when new, the current transaction or export quotation, the freight and duty stack for the destination, and the total landed cost after registration. Chinese MSRP moved across the 2023 Champion Edition and 2024 facelift; export quotations vary with specification, order size and market; and duty treatment differs by assembly country. A useful discipline is to build a one-page landed-cost sheet per candidate car, leaving every cell empty until a document supports it, and to treat any seller who quotes a single global price as a seller who has not understood the question.

Where the numbers do exist, date them. A price from a 2024 launch is not a 2026 quotation, and a Chinese domestic promotion is not an export price. For a retired-in-China nameplate, expect the market to split between late-series new stock, low-mileage used units and locally assembled Sealion 6 equivalents, each with its own cost logic and each deserving its own spreadsheet row.

Frequently Asked Questions

Is the Song Plus the same car as the Seal U and Sealion 6?

Yes, in terms of core vehicle architecture. The Song Plus badge is used in China, the Seal U badge is used in Europe, and the Sealion 6 badge covers Australia, New Zealand and several Southeast Asian markets. Specification, range cycle and assembly plant differ by market, so confirm the exact version by VIN rather than by badge alone.

Which DM-i battery size makes sense for a dealer?

The 112 version is the middle option and historically the volume seller, which supports easier resale and parts availability. The 160 version suits buyers who drive longer daily distances on electricity. The 75 version is the value entry point. Fleet buyers should match the battery to the daily duty cycle rather than paying for range the route never uses.

What battery evidence should I demand before purchase?

Ask for a diagnostic health report generated close to the sale date, showing state of health and cell balance, plus a supervised charge session at the car's rated AC power. A dashboard percentage alone is not evidence, and a seller who cannot produce a report is a seller leaving price on the table for the buyer who asks.

Does it matter whether the car was built in China, Uzbekistan or Thailand?

It matters for paperwork more than for the vehicle itself. The assembly plant determines the certificate of origin, which feeds duty and tariff treatment, and it shapes the language of the manuals and warranty documentation. The engineering specification follows the version, so verify version first and origin second.

Is a Song Plus a sensible buy now that China retired the nameplate?

Retirement in China in January 2026 ended domestic-market supply but not the export line, and the one-million-unit production base supports continued parts circulation. The decision should rest on condition, documentation and landed cost, with one extra question asked of any long-term holding: confirm parts and service coverage for the version in the destination market before committing.

The short version

Buy the version, not the badge. Establish whether the car is a DM-i 75, 112 or 160 or an EV 520 or 605; demand a dated battery health report; test a real charge session; decode the VIN against every document in the file; and build a landed-cost sheet where no number appears without a source. The Song Plus rewards exactly this kind of patient verification, because its scale means most defects and most documentation gaps are findable before payment. AutoCN supports this process as a sourcing and research platform for Chinese vehicles, and the BYD brand pages plus the contact route are the practical next steps for buyers ready to shortlist specific units.