News

What This Assembly Is — and What It Replaces

The A/C Radiator Cooling Fan Assembly for 2010–2015 Audi TTS Quattro is a direct-fit aftermarket replacement for the Audi TTS 8J (Typ 8J) platform. It fits 2010, 2011, 2012, 2013, 2014, and 2015 TTS Quattro models with the 2.0TFSI (EA113/CDLA) powertrain.

It cross-references five OEM numbers. The current number is 1K0959455ET, which supersedes 1K0959455CR, 1K0959455DH, 1K0959455Q, and 3C0959455G. The full supersession chain: 3C0959455G → 1K0959455Q → 1K0959455DH → 1K0959455CR → 1K0959455ET.

How it integrates with the 8J platform

The assembly connects to the factory J293 Coolant Fan Control Module through the car's CAN-bus architecture and supports both low-speed and high-speed fan stages. That two-stage operation holds coolant temperature on the 200 kW (268 hp) TTS Quattro under load. Because the unit is electrically identical to OEM, no VCDS or ODIS adaptation is needed after installation.

2026 Market and Compliance Context

The DC brushless cooling fan market is projected to reach USD 1,584 million, and SAE/ISO harmonized thermal management standards (ISO 4081:2016/mod) now extend to electrified platforms. This assembly is built to those prevailing aftermarket benchmarks. It aligns with ISO 16750-3:2023 (Road Vehicles — Environmental Conditions for Electrical Equipment) and the thermal endurance profiles in SAE J2931.

The wider market is growing fast: USD 3.01 billion in 2025, forecast to hit USD 4.4 billion by 2030 at a 7.9% CAGR, with Continental/VDO, Denso, and Bosch converging on the same architectures.

Materials: PA66-GF30 blades, PBT-GF20 housing

The fan blades are PA66-GF30 — 30% glass-fiber-reinforced polyamide 66 per SAE J1639 — rated 240°C continuous and 280°C peak. That sits well above the EA113 radiator outlet temperature of 105–115°C under load. The motor housing is PBT-GF20 with IP55 sealing per ISO 20653:2023.

Ford (HC3Z-8C607-A family), GM (Acdelco 15- series), and Toyota (16363-0A130) all moved to glass-reinforced thermoplastics in their 2026 cooling modules. The assembly conforms to ISO 16750-3 thermal cycling across a —40°C to +125°C ambient range.

Electrical: 12V / 400W BLDC and the 0.8–1.2 Ω winding window

The brushless DC motor runs at a nominal 12V / 400W with PWM speed control, matching the load signature the J293 module expects. The J293 monitors current draw to detect open-circuit and short-to-ground conditions, so electrical accuracy is not optional.

A unit that drifts from the OEM impedance of roughly 0.8–1.2 Ω at the motor winding triggers spurious DTCs — typically P0691 (Fan 1 Control Circuit Low) and P0692 (Fan 1 Control Circuit High). This assembly stays inside the ECM's expected electrical envelope, which is why it installs plug-and-play.

Specs Comparison: Koeep Assembly vs Audi OEM vs 2026 Benchmark

DTC Mapping for the 8J TTS

The assembly directly resolves two code ranges and can clear two secondary codes when poor radiator airflow is the root cause.

• Primary: P0480, P0481, P0482 (Cooling Fan 1/2/3 Control Circuit Malfunction) and P0691, P0692, P0693, P0694 (Cooling Fan Relay Control Circuit Low/High).
• Assembly failure indicators: P0480, P0481, P0691, P0692 first; P0482, P0693, P0694 secondary.
• May also clear: P00B7 (Engine Coolant Flow Low/Performance) and P2181 (Cooling System Performance).

Caution: P0480 plus P0691 together strongly correlate with J293 module failure. Check module health and the SAE J-case fuses before blaming the fan.

Three-step diagnostic before you order

1. Inspect the 40A and 60A SAE J-case fuses under the battery cover — known failure points on the 8J platform.
2. Check the J293 module on the fan shroud for corrosion or water ingress at the connector.
3. Run Output Test Mode with VCDS or a compatible scan tool. Module passes but fans don't spin: assembly failed. Module won't communicate: replace the J293 first.

Installation and Post-Install Verification

After the swap, clear all stored DTCs with a VCDS or OBD-II scan tool. Then heat-cycle the engine: idle until coolant reaches 105°C and verify both fans engage at low speed, then high speed.

Watch for stable regulation between 90–105°C. If you also replaced the thermostat, run the VCDS coolant bleed procedure to prevent air-lock overheating.

Service Life and Fitment

Beyond the TTS, the assembly is cross-compatible with Audi TT (8J) 2.0T, TTS 2.0TFSI, and TTRS 2.5TFSI models from 2008–2015 when equipped with the dual-fan configuration. These cars are now 11–16 years old — the window where fan assemblies and suspension parts tend to wear out together.

Refreshing the rest of an 8J chassis?

Cars this age usually need suspension work too. The 4Pcs Front Rear Air Suspension Shock Strut for Audi TT TTS TTRS MKII Quattro FWD covers all four corners, and the Pair Rear Shock Absorbers Magnetic Ride for 07–15 Audi TT MKII TTS TTRS Quattro handles magnetic-ride rear axles. For cooling parts in one place, browse the Engine Cooling Parts catalog.

Get Help Before You Order

Not sure the assembly matches your build? Send the OEM number from your old unit — 1K0959455ET or any superseded number — via the Request for Quote page, email support@koeep.com, or message the team on WhatsApp.

Koeep also publishes repair guides for other machinery — see the 2 Spindle Assembly guide for John Deere Scotts LT160 LT180 S1642 S1742 (AM126225) if you maintain a ride-on mower alongside the Audi.

Frequently Asked Questions