The Bosch 0986435360 is a common diesel injector for the Audi A3 2.0 TDI models built between 2008 and 2010.
Here are the specific details and important checks to ensure a perfect fit for your vehicle：
1. Technical Match
Part Number: Bosch 0986435360
Vehicle: Audi A3 (8P Chassis) 2.0 TDI
Years: 2008 – 2010 (Facelift model)
Engine Code(s): This part is primarily used for engines with codes CBAB and CFFB (which are common 2.0 TDI engines in that year range).
Injector Type: Solenoid Valve Injector (Piezo alternative exists, but this is the standard solenoid type).
2. Critical Checks Before Buying
While the part number is correct, you must verify a few physical details to avoid buying the wrong unit:
The "C" Revision: The original part number for your car likely ends with a letter, usually 0986435360C. The "C" indicates a revision. If your car currently has the "C" revision, you must install the "C" revision. Mixing revisions (e.g., an older "A" or "B" with a "C") can cause the engine to run rough or misfire.
Hydraulic Return Nipple: Ensure the injector you are buying has the correct fuel return line nipple on top. Some variations have a metal pipe fitting, others have a push-on hose nipple. The 0986435360 usually features the correct configuration for the Audi A3 8P.
3. Installation Requirements (Crucial)
Replacing injectors on this engine (PD TDI / Common Rail) is not just a plug-and-play job:
Coding Required: After installing new injectors (or even swapping them between cylinders), you must code them to the ECU using a diagnostic tool (VCDS, ODIS, or a high-end scanner). Each injector has a 4 or 5-digit code printed on top (the "IMA" or "IMV" code). If you do not code them, the engine will run rough, smoke, and have poor performance.
Bolt Torque: These injectors are held down by a single bolt/clamp. This bolt must be tightened to a specific torque (usually around 10 Nm + 180° or a specific angle). If over-tightened, you can crack the injector body or the cylinder head.
Seals: Always replace the Teflon seals and copper washers (if applicable) when installing. If the old Teflon seal is reused, compression will blow past the injector, causing a loud knocking noise and power loss.
4. Symptoms of Failure
If you are replacing these due to issues, common symptoms on the 2.0 TDI CBAB/CFFB engine include:
Hard starting (especially when hot or cold).
White smoke at idle.
Lack of power (limp mode).
Fuel in the engine oil (caused by bad internal seals).
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