Product Specification

High-quality Auxiliary Coolant Water Pump A2218350064 for Mercedes-Benz W221 S-Class

This premium electronic auxiliary water pump with OE number A221 835 0064 is a vital cooling & heating system component exclusively for Mercedes-Benz W221 S-Class luxury sedan, widely stocked by Mercedes professional repair shops and cross-border auto parts wholesalers with stable aftermarket demand.

Core Selling Points

High-frequency maintenance cooling part with sustainable repeat bulk orders

Auxiliary water pumps are essential wearable electrical parts for W221 models. Original pumps easily suffer internal motor burnout, impeller abrasion, shaft seal aging and circuit contact failure under long-term high temperature and frequent startup. Failed pumps cause slow cabin heating in winter, engine overheating at idle, weak seat heating function and coolant leakage. Luxury car service garages and global spare parts distributors place recurring bulk orders all year round, bringing steady sales volume and attractive profit margins for dealers.

100% OE precise matching, plug-and-play direct installation without modification

Manufactured strictly according to Mercedes original mold specifications: pump housing shape, mounting hole spacing, coolant inlet/outlet caliber and wiring plug pin layout fully consistent with genuine OEM parts. No pipeline cutting, wiring refitting or extra programming required during replacement, directly fixed on the original vehicle pipeline to greatly save maintenance labor hours.

Compatible Vehicle Range

Mercedes-Benz S-Class W221 chassis (S300, S350, S400 Hybrid, S500, S600); also fits CL-Class C216 with matched cooling circuit structure.

Reinforced high-temperature waterproof durable structure

1. Corrosion-resistant engineering plastic pump body, compatible with all types of antifreeze, resistant to engine compartment high heat
2. Wear-resistant closed impeller, stable coolant circulation, not easy to jam by tiny impurities
3. Double-layer high-temperature mechanical sealing ring, effectively prevent coolant seepage and dripping
4. Fully sealed waterproof motor module, block dust and water vapor to avoid short circuit and motor burnout
5. Original standard plug connector, stable electrical signal transmission without triggering cooling system fault codes

Stable auxiliary circulation to optimize heating and engine heat dissipation

Independently drive coolant small circulation loop during idle or stop-start conditions. Accelerate cold engine warm-up, deliver continuous hot air for cabin heater and seat heating, assist heat dissipation to prevent abnormal temperature rise in traffic jams, effectively protect the engine and improve riding comfort.

Fully solve typical auxiliary water pump failure faults

Perfectly fixes common cooling system malfunctions:

• Slow or no hot air output inside the cabin in cold weather
• Engine water temperature surges when idling for a long time
• Coolant leakage at pump mounting position
• Continuous abnormal buzzing noise after vehicle ignition
• ECU stores cooling circuit fault codes

Rigorous multi-stage factory testing & sufficient spot stock

Each auxiliary water pump passes flow circulation test, water tightness leak test, high-low temperature cycle aging test and electrical conduction inspection before delivery, complying with TS16949 international automotive quality standards. Mass ready stock supports mixed one-stop bulk procurement with main water pumps, thermostats, cooling hoses and cooling system accessories. Custom neutral packaging and private label OEM services are available for cross-border wholesale customers.