2007 Acura P0305: What It Means & Is It Safe to Drive?
P0305 on the 2007 Acura: Cylinder 5 Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
Misfire on cylinder 5—present on V6, V8, and inline-5 engines only. On V6 engines, cylinder 5 is sometimes harder to access; factor labor into repair estimates.
Common causes on the 2007 Acura
- Fouled spark plug
- Failed ignition coil
- Leaking or clogged injector
- Low compression from valve or ring wear
Symptoms
- Check Engine Light
- Engine shaking or rough idle
- Power loss under acceleration
Typical fixes
- Replace spark plug and coil on cylinder 5
- Test and replace injector if needed
- Compression and leak-down test
Repair cost range
For a 2007 Acura, repairs for P0305 typically fall between $150 and $1000, depending on the root cause and labor rates in your area.
Known issues on Acura
Acura J-series V6 P0305 on rear-bank cylinder 5 requires intake manifold removal. Confirm the coil is faulty with a swap test to the front bank first. On the RL's J37A1, SH-AWD torque vectoring adds no additional complexity to the misfire diagnosis.
Most commonly affected models
TL J35Z 2004–2008MDX J35Z 2003–2006RL J37A1 2005–2012